CN102468759A - Resonant converter, and resetting method and device thereof - Google Patents
Resonant converter, and resetting method and device thereof Download PDFInfo
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- CN102468759A CN102468759A CN2010105383191A CN201010538319A CN102468759A CN 102468759 A CN102468759 A CN 102468759A CN 2010105383191 A CN2010105383191 A CN 2010105383191A CN 201010538319 A CN201010538319 A CN 201010538319A CN 102468759 A CN102468759 A CN 102468759A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention provides a resonant converter, and a resetting method and a resetting device thereof. The resetting method and the resetting device are used for limiting or eliminating residual energy in a resonant network before the resonant converter is restarted. According to the idea of the invention, an energy resetting module is assembled to the resonant converter and is used for limiting peak current generated in a switching circuit by resetting the residual energy in a resonant circuit of the closed resonant converter after the resonant converter is closed.
Description
Technical field
The present invention relates to a kind of remapping method and device thereof, relate in particular to a kind of remapping method and device thereof that is applied to the resonant mode transducer.
Background technology
Because day by day to the concern of environment and energy resource consumption; The consumer constantly seeks to have more the product of energy efficiency; The designer of electronic product utilizes the flexible topology of switching to improve the usefulness of electronics and electric equipment products, and these products can be moved with higher frequency.Yet switch cost but becomes an obstacle of conserver power source, especially when carrying out the high frequency operation.For this reason; Resonant mode transducer (resonantconverter) can be in order to provide the zero voltage switching technology; Reduce the switch cost that electronic equipment takes place when opening or cut out conversion, can in higher switching frequency, move compared to other transducers so as to making it.The resonant mode transducer includes switch element and resonant inductance capacitance network.
Basic switch element by one include with a diode and a transistor the electronic component that gets of parallel connection, like typical power metal oxide semiconductor field-effect transistor (MOSFET).Specifically, the resonant mode transducer switches this switch element when switch element is in zero current or no-voltage point, with stress and the reduction radio interference that reduces switch element.(zero-voltage switching ZVS) refers to that when switch the switches magnitude of voltage on the switch is zero or one to approach zero low voltage value, just can reduce the consume in the Circuits System thus to zero voltage switching.
The resonant mode transducer is logical when controlling through the switching frequency that changes its switch element.It similarly is that DC changes high-frequency AC inverter, resonant mode DC-DC transducer, resonant mode inverter or produces the rectifier, resonant mode AC-DC transducer, resonant mode AC-AC transducer etc. of line frequency (line-frequency) AC that common resonant mode transducer comprises.Common application for instance, comprises PC, server, telecommunication system, mobile phone, automobile, Medical Devices, recreation electronic game and industrial equipment etc.
In some application example, as when this resonant mode transducer restarts, switch element flows through a big peak current.The infringement switch element yet this big peak electricity fails to be convened for lack of a quorum, and this peak current is after this resonant mode transducer is closed, the residual energy person of causing in the resonant network by this resonant mode transducer.
Technological deficiency " the known technology summary of the invention
Restriction and defective in view of known technology; The present invention proposes a kind of " remapping method of resonant mode transducer and device thereof "; With before the resonant mode transducer restarts, the interior rudimental energy of resonant network that limits or prevent, and then solve the insurmountable problem of known technology.
This part outline some characteristic of the present invention, other characteristics will be described in follow-up paragraph.The present invention is through additional claim definition, and it is herein incorporated paragraph as a reference.
Main purpose of the present invention is remapping method and the device that a kind of resonant mode transducer is provided, and through before the resonant mode transducer restarts, the interior rudimental energy of resonant network that limits earlier or prevent avoids it that element in this resonant mode transducer is caused damage.
For reaching above-mentioned purpose, a preferred embodiments of the present invention is that a kind of remapping method that is applied to the resonant mode transducer is provided, and it comprises step: close a resonant mode transducer; And through being refitted in the rudimental energy in the resonant circuit of closing the resonant mode transducer, with a peak current that is generated in the switching circuit that limits this resonant mode transducer.
For reaching above-mentioned purpose; Another preferred embodiments of the present invention is that a kind of reset apparatus that is applied to a resonant mode transducer is provided, and this resonant mode transducer comprises a switching circuit and a resonant circuit, and this reset apparatus comprises a control module; Be coupled to this switching circuit; And be closed this switching circuit of back control in this resonant mode transducer, with through being refitted in rudimental energy in the buttoned-up resonant mode transducer, and limit a peak current that is generated in this resonant mode transducer.
For reaching above-mentioned purpose, another preferred embodiments of the present invention comprises a switching circuit for a resonant mode transducer is provided, and receives an input voltage; One resonant circuit is coupled to this switching circuit, and comprises the connection that is one another in series of a resonant inductance, a resonant capacitance and a magnetizing inductance; One transformer is coupled to this resonant circuit and receives the output of this resonant circuit; One rectification circuit is coupled to this transformer, and the output of reception and this transformer of rectification is to produce the output of this resonant mode transducer; And a driver, be coupled to this switching circuit and control this switching circuit, after being closed with this resonant mode transducer, through being refitted in rudimental energy in the buttoned-up resonant mode transducer, and limit a peak current that is generated in this switching circuit.
The present invention can avoid the problem of the peak current of contactor when restarting, and reaches low consumed effect.
The present invention explains through attached drawings and embodiment, makes clearer understanding.
Description of drawings
Fig. 1: it discloses the block diagram that example embodiment assembly of the present invention has the resonant mode transducer of energy replacement module;
Fig. 2 A: it discloses in the example embodiment of the present invention circuit diagram with the LLC serial-resonant transducer of energy replacement module controls;
Fig. 2 B: the waveform sketch map that its resonant mode transducer that discloses example embodiment of the present invention moves in a normal mode;
Fig. 2 C: the waveform amplification sketch map of resonant capacitance voltage and resonant inductance electric current in its this real example embodiment resonant mode transducer of announcement;
Fig. 3 A: it discloses the equivalent circuit diagram of resonant network in the example embodiment of the present invention;
Fig. 3 B: it discloses condenser type and switches gained sketch map as a result;
Fig. 4 A: it discloses the operational flowchart of example embodiment of the present invention;
Fig. 4 B: it discloses in the example embodiment of the present invention with respect to the operational illustration yet that drives flow process in Fig. 4 A;
Fig. 4 C: disclose among each embodiment mains switch at different drain current (I
D) to draining to source voltage (V
D) operator scheme sketch map in the pattern;
Fig. 4 D: it discloses the operator scheme sketch map of arbitrary switch Q1～Q4 in the example embodiment of the present invention;
Fig. 4 E: the equivalent circuit diagram of switching circuit and resonant network in its announcement example embodiment of the present invention;
Fig. 4 F: it discloses the operation chart of reset system when t0=t1 in the example embodiment of the present invention;
Fig. 4 G: it discloses the operation chart of reset system when t2=t3 in the example embodiment of the present invention;
Fig. 5: it discloses the flow chart that limits or eliminate rudimental energy in resonant network before this resonant mode transducer is reset in the example embodiment of the present invention;
Fig. 6 A: the resonant mode transducer reset system circuit diagram of tool serial-resonant transducer and energy replacement module in its announcement example embodiment of the present invention;
Fig. 6 B: it discloses the element waveform sketch map of this energy replacement module in the example embodiment of the present invention;
Fig. 6 C: it discloses in the example embodiment of the present invention the grid voltage waveform sketch map of this serial-resonant converter switch under different Dead Times operations;
Fig. 7 A: it discloses the resonant mode transducer reset system circuit diagram that has a series connection resonant mode transducer and an energy replacement module in another example embodiment of the present invention;
Fig. 7 B: it discloses the element waveform sketch map of this energy replacement module in another example embodiment of the present invention;
Fig. 7 C: it discloses in another example embodiment of the present invention the voltage waveform view of this serial-resonant converter switch under different R1 operations;
Fig. 8 A: it discloses the resonant mode transducer reset system circuit diagram of tool serial-resonant transducer in the example embodiment of the present invention;
Fig. 8 B: it discloses the operating system sketch map of the system circuit diagram of Fig. 8 A in the example embodiment of the present invention.
Description of reference numerals in the above-mentioned accompanying drawing is following:
100: resonant mode converter structure block diagram
101: the resonant mode transducer
103: switch element
105: resonant network
107: energy replacement module
200: the serial-resonant transducer
201: switching circuit
203: resonant network
205: transformer
207: rectification circuit
220: the waveform sketch map
240: the waveform sketch map
300: the resonant network equivalent circuit diagram
301: the rectangular wave input
310: the resonant network equivalent circuit diagram
311: the rectangular wave input
320: the resonant network equivalent circuit diagram
330: condenser type switches sketch map
400: drive flow process
401: start-up period
403: operated in saturation
405: linear operation
407: drive signal produces
410: operational illustration yet
420: the operator scheme sketch map
430: the operator scheme sketch map
431: linear (switch) pattern
433: saturation mode
440: equivalent electric circuit
441: symmetrical rectangular wave input
450: operation chart
460: operation chart
500: flow chart
501～507: step
600: the reset system circuit diagram
610: the serial-resonant transducer
620: energy replacement module
621: driver
623: control module
625: the single end
627: Enable Pin
630: the waveform sketch map
640: grid voltage waveform sketch map
700: the reset system circuit diagram
710: the serial-resonant transducer
720: energy replacement module
721: driver
723: control module
725: the single end
727: Enable Pin
729: amplifier
730: the waveform sketch map
740: voltage waveform view
800: the reset system circuit diagram
820: the operating system sketch map
Cin: input capacitance
Cd: electric capacity
Co: output capacitance
Cr: resonant capacitance
Cs: electric capacity
IQ3: electric current
I
D: drain current
Ir: electric current
Im: electric current
Lm: magnetizing inductance
Lr: resonant inductance
MOSFET: mos field effect transistor
Q1～Q4: mains switch
Q5～Q6: synchronous rectification switch
Qd: switch
Qs: switch
R: resistance
R1～R3: resistance
RL: load
Rd: resistance
Ro: resistance
V
D: source voltage
V
IN: input voltage
V
DS: voltage
V
GS: voltage
V
T: voltage
V
OUT: output voltage
Vc: voltage
Vcc: accessory power supply supply voltage
Vcc_ref: reference voltage
Vcr: initial voltage
Vo: output voltage
Vth: voltage
S1: drive signal
S2: drive signal
T: transformer
T1: Dead Time
T2: Dead Time
ZVS: zero voltage switching
n
2RL: load
T0～t3: time point
T0 '～t2 ': time point
Embodiment
Some exemplary embodiments that embody characteristic of the present invention and advantage will be described in detail in the explanation of back segment.Be understood that the present invention can have various variations on different modes, it does not depart from the scope of the present invention, and explanation wherein and accompanying drawing be used as the usefulness of explanation in itself, but not in order to restriction the present invention.
Fig. 1 discloses the block diagram that example embodiment assembly of the present invention has the resonant mode transducer of energy replacement module (energy resetting module), and it is in order to consume the dump energy of this transducer before restarting this resonant mode transducer.As shown in the figure, resonant mode transducer 101 is a kind of power supply changeover device that is applied to electronic equipment.In one embodiment, this resonant mode transducer 101 includes a switch element 103, a resonant network 105 and an energy replacement module 107.This resonant mode transducer 101 receives input voltage VIN; Produce output voltage VO UT; And use the electric capacity of resonant network 105 and inductance to mould the whole electric current of a given switch element 103 or the waveform of voltage of passing through, wherein this switch element 103 can be Mosfet, elements such as IGBT.This resonant network 105 is also referred to as a resonant circuit (resonant circuit) or a resonant slots (resonant tank).In theory, when after this resonant mode transducer 101 is closed, restarting, the ifs circuit energy is absorbed fully passes through this switch element 103 with no current or voltage.Yet, as previously mentioned, after closing this resonant mode transducer 101, still have remaining energy in this resonant network 105.And this energy replacement module 107 promptly is used to consume or reset before this resonant mode transducer 101 starts remain in the dump energy in this resonant network 105, to limit the peak current of this switch element 103.This energy replacement module 107 alternative output drive signal S1 and S2 are to this switch element 103 and/or this resonant network 105 again.
Fig. 2 A discloses in the example embodiment of the present invention circuit diagram with energy replacement module controls LLC serial-resonant transducer.Shown in Fig. 2 A, this LLC serial-resonant transducer 200 includes the switching circuit that is made up of mains switch Q1～Q4 201, a resonant network 203, a transformer T 205, and a rectification circuit 207.Wherein, LLC is meant and includes a resonant inductance Lr, a resonant capacitance Cr in the resonant circuit, and the magnetizing inductance Lm connection that is one another in series.And this resonant mode transducer 200 also includes an input capacitance Cin.This transformer 205 is isolated with this rectification circuit 207 with this switching circuit 201 and this resonant network 203 through the secondary side coil of a primary side coil and two series connection.In one embodiment, this rectification circuit 207 comprises a pair of synchronous rectification switch Q5～Q6, and it is connected to an output capacitance Co and a load RL.In Fig. 2 A, this switch Q5 and Q6 can adopt like MOSFET and implement.The source terminal of this switch Q5 and Q6 is connected to the negative electrode (cathode) of this capacitor C o, and the drain electrode end of the drain electrode end of this switch Q5 and this switch Q6 is connected to this secondary side coil.The common tie point of twice level coils then is connected to the anode (anode) of this capacitor C o and the positive pole of an output voltage V o.
This resonant mode transducer 200 receives an input voltage vin, and produces an output voltage V o.This resonant mode transducer 200 has a parameter designing and opereating specification, and (zero-voltage switching is ZVS) under the state to guarantee working in a zero voltage switching by this switch Q1～Q4; Even make this rectifier switch Q5～Q6 work in zero current switching (zero current switching, ZCS) state.The main function of zero voltage switching makes switch element before unlatching, guarantees that the voltage on this switch is zero, and then reduces the switch consume.
The waveform sketch map that the resonant mode transducer 200 of Fig. 2 B announcement example embodiment of the present invention moves in a normal mode.In Fig. 2 B, the drive signal of S1 representation switch Q1 and Q4, the drive signal of S2 representation switch Q2 and Q3, ir and im then represent the electric current of flow through this resonant inductance Lr and this magnetizing inductance Lm respectively.When switch Q1 and Q2 are closed, the im value be respectively Im and-Im.Vc is the voltage of this resonant capacitance Cr.The reference direction of ir, im and Vc then is disclosed in Fig. 2 A.Difference between ir and im is the primary side electric current of this transformer T.In regional A and B, energy is sent to primary side by primary side.In addition, this exciting curent im is more or less the same under a light-load conditions and a heavy duty condition.
At time point t0 ', because primary side current i r is opposite in its reference direction, switch Q1/Q4 opens under zero voltage condition.And the interval between time point t0 ' and t1 ', therefore rectifier switch Q6 conducting does not participate in resonance at this magnetizing inductance, increases so this exciting curent im is linear.Because the resonance between Lr and Cr, the current i Q6 through Q6 appears with quasi sine (quasi-sine) waveform.At time point t1 ', Q6 closes, because switch periods is longer than the harmonic period between Lr and Cr, makes that before Q1/Q4 was closed, ir fell progressively to im.Then, Cr, Lr and Lm participate in resonance.In order to simplify parsing, suppose Lm＞＞Lr, then Ir in t1 ' to being a straight line between t2 ' approximately.At time point t2 ', Q1/Q4 closes.And at time point t3 ', Q2/Q3 then no-voltage opens.In the interval of t3 ' to the interval of t4 ' and t4 ' to t5 ', also can be like preceding parsing.The mode of operation of electric current I Q5 and waveform are all identical with IQ6.IQ5 and iQ6 constitute the output rectified current.Three shut-in times that waveform sketch map 220 among Fig. 2 B also discloses when this resonant mode transducer is closed are put t1, t2 and t3.Certainly this resonant mode transducer can be put in any time and be closed.
In Fig. 2 A, produce a rectangular wave through opening and turn-off between A point and B point of switch Q1～Q4, and provide to resonant circuit 203.If circuit working is at resonant frequency point, then the electric current of this resonant circuit 203 then is close to a sine curve.Between A point and B point, this sinusoidal current waveform lags behind voltage waveform between this A point and the B point, so when voltage waveform reached its zero crossing, current value was a negative value still, thereby reaches zero voltage switching.
The waveform amplification sketch map 240 of resonant capacitance voltage and resonant inductance electric current in Fig. 2 C announcement example embodiment resonant mode transducer 200 of the present invention.When this resonant mode transducer 200 (be transducer at t0 ' afterwards not to its load conveying capacity) after time point t0 ' (shut-in time point 241) closes, restart (be transducer at t1 ' afterwards again to its load conveying capacity) in time point t1 ' (replacement time point 243).Certainly, this resonant mode transducer can be restarted after closing immediately, and promptly time point t0 '=t1 ' makes that time interval 245 is zero.And exist the regular hour poor between putting in time point that restarts under the general situation and shut-in time, i.e. t1 '＞t0 '.Behind time point t1 ', the voltage Vc of resonant capacitance Cr then vibrates along oscillation center 247, and is begun decay and in several duty cycle, decayed to zero by a certain magnitude of voltage, as reducing to 0v from 120v.Fig. 2 C indicates has first duty cycle 249.Shown in Fig. 2 C,, in resonant network 203, have rudimental energy and stay no matter when this resonant mode transducer 200 is closed (as at time point t0 ').This rudimental energy that is present among this Cr and/or the Lr can't be consumed fast.Therefore, this resonance current Ir has direct current biasing (DC bias).If this resonant mode transducer 200 restarts between time interval t1 '-t2 ', then switch Q1/Q4 or Q2/Q3 will produce high current peak because of the direct current biasing of ir and cause the circuit infringement.Therefore, before this resonant mode transducer 200 of resetting, be necessary to solve earlier this special problem.
Fig. 3 A discloses the equivalent circuit diagram of resonant network in the example embodiment of the present invention.The equivalent electric circuit 300 of this resonant network 203 is in order to analyze this operation of resonant network 203 between time interval t1 and t2.This circuit 300 have one by this switching circuit 201 produce and have certain value (as+/-400v) symmetrical rectangular wave input 301.For simulating the operation of this resonant network 203, this equivalence circuit 300 can further be divided into two equivalent electric circuits 310 and 320.This circuit 310 has a symmetrical rectangular wave input 311, but does not have the initial voltage Vcr of this resonant capacitance and the initial current Ir of this resonant inductance.On the other hand, this circuit 320 has initial voltage Vcr or initial current Ir, but does not have input signal.In circuit 320, this initial voltage Vcr and initial current Ir can be reset in the switching manipulation time.The resonance current of circuit 300 then comprises the reset current of circuit 320 and the switching current of this circuit 310.
This circuit 310 and 320 can pass through general business software, like the SIMULINK in the MATLAB, the simulation waveform of this voltage Vcr and this electric current I r is provided.In this emulation, this resonant mode transducer 200 restarts in time point t1 '.Fig. 2 C discloses in the example embodiment of the present invention, the waveform 240 of the resonant capacitance voltage Vcr of this resonant mode transducer 200 and resonant inductance electric current I r.Behind time point t1 ', this voltage Vcr is descended by a certain magnitude of voltage (like 120v) vibration, and this electric current I r has direct current biasing in this process.Because the direct current biasing of this electric current I r, this switch Q1-Q4 need to such an extent that bear the result that capacitive is switched.Fig. 3 B then discloses the sketch map 330 that capacitive is switched.For instance, in the moment that Q1 opens, the body diode drag flow overcurrent of Q3.Because of Q1, Q3 is in same brachium pontis again, and therefore, the capacitive switching result makes and short circuit can take place and produce very big loss under this situation, and this may damage switch Q1～Q4.Shown in Fig. 3 B, the simulated current peak value of the simulation of this electric current I Q3 possibly promptly increased (as surpassing 20A) widely in a short time.
For solving this problem, the driving flow process 400 of an energy replacement module 107 is imported into this resonant network energy of before restarting this resonant mode transducer 200, resetting earlier.Shown in Fig. 4 A, it discloses the operational flowchart of example embodiment of the present invention.In particular, drive flow process 400 by starting stages 401 beginning, and judge whether to close this resonant mode transducer 200.To keep operating state (as before time point t0) if judge this resonant mode transducer 200, then this driving flow process 400 can make this transducer work in a linear working state 405.If judge that this resonant mode transducer 200 is closed (as between time interval t1～t2), then this driving flow process 400 can make this transducer work in a saturated 403, to consume the energy of resonant network.Then, step 407 produces drive signal S1 and S2 to Q1～Q4 according to the output result of step 403 or 405.Fig. 4 B discloses in the example embodiment of the present invention operational illustration yet 410 with respect to Fig. 4 A flow process 400.Switch Q1～Q4 works in saturation condition in step 403 (between time interval t1-t2), and in step 405 (time point＜t0 and＞the locating of t3), works in linear condition with switch Q1～Q4.
Fig. 4 C is the drain current (I of a switch (like MOSFET) among each embodiment
D) and drain to source voltage (V
DS) concern sketch map 420.The boundary of linear (ohm) pattern and saturation mode is with the crooked parabola (V of a rising
DS=V
GS-V
T) represented.In linear model, when this MOSFET was in conducting state, this MOSFET was like a very little resistance (in full to hundreds of m Ω).
Linear model: work as V
GS＞Vth and VDS＜(VGS-Vth).
And be under the saturation mode, when the MOSFET conducting, it is controlled by its gate-source voltage just as a rheostat (rheostat), and it has very large resistance (in full to hundreds of or thousands of Ω).
Saturation mode: work as V
GS＞Vth and V
DS＞(V
GS-Vth).
Fig. 4 D discloses the operator scheme sketch map 430 of arbitrary switch Q1～Q4.In a linearity (switch) pattern 431, for example, Q3 controls its conducting and shutoff as a switch application by the drive signal on its gate-source, and Q3 has very little conduction resistance value (in full to hundreds of m Ω).And in a saturation mode 433, Q3 is like a rheostat, by the horizontal V of different gate-source voltage
GS(like 2-20V) its conduction resistance value of control control, and have big resistance value (as greater than dozens of Ω).Be the operation of simulation Q1～Q4 under saturation mode 433, this switching circuit 201 and resonant network 203 change with 440 expressions of the equivalent electric circuit shown in Fig. 4 E, and as shown in the figure, this equivalence circuit 440 includes a load Q1/Q2, a load Q3/Q4, and a load n
2RL, wherein this load Q1/Q2 or Q3/Q4 represent the resistance value of Q1～Q4 under saturation mode.This equivalence circuit 440 has a symmetrical rectangular wave input 441 that is produced by switching circuit 201.Under saturated, Q1～Q4 with as the pattern of big resistance by V
GSThe control operation, but not move like switch.Therefore, saturation mode can limit the electric current of the Q1～Q4 that flows through, and as resistance, consumes resonant energy.This flow process 400 just can be avoided before having discussed and produce the current peak problem on the switch.
Any time point after the saturation operation mode (step 403) between time interval t1 to t2 can be put t0 in the shut-in time and between before restarting time point t3 takes place.Fig. 4 F discloses the operation chart 450 of system 400 when t0=t1 in the example embodiment of the present invention.In this embodiment, this resonant mode transducer 200 opens and gets into saturation operation mode immediately at once after time point t0 is closed.Fig. 4 G then discloses the operation chart 460 of system 400 when t2=t3 in the example embodiment of the present invention.In this embodiment, this resonant mode transducer 200 works in saturation mode with the energy in the consumption circuit and at time point t3 (t2) quilt unlatching again between time interval t1 to t2 (t3).After the moment, this resonant mode transducer 200 can be restarted down in zero initial condition at t3, and the problem that does not have capacitive to switch produces.
Fig. 5 discloses the flow chart 500 that limits or eliminate rudimental energy in resonant network before this resonant mode transducer is reset in the example embodiment of the present invention.For instance, this flow process 500 can be carried out by the energy module 107 of resetting.For example, in step 501, this energy replacement module 107 is closed a resonant mode transducer.In step 503, this energy replacement module 107 limits a peak current that betides in this resonant mode converter switch circuit through the rudimental energy in this resonant mode transducer resonant circuit of resetting.This energy replacement module 107 can one or more resistance consume rudimental energy in this resonant mode transducer through being controlled in.In one embodiment, controlled one or more resistance are included in one or more switches of operating in the saturation mode (like Q1～Q4) in this resonant mode transducer.These one or more switch elements can be driven (by a driver) and remove to control this switch through the duty ratio of controlling this drive signal through a drive signal is provided works in saturation mode, and wherein the duty ratio of the drive signal of this switch element ratio under saturation mode is little down at normal mode (as being operated under the linear model when transducer).These one or more switch elements also can be through reducing a driving voltage be driven to go to control works in saturation mode, and wherein the driving voltage under this switch element circuit is lower than and in a normal mode, moves under saturation mode.In another embodiment, but in this resonant circuit one or more resistance also Be Controlled remove consumed energy.The embodiment that can be disclosed referring to Fig. 8 A.Connect into resonant network after these one or more resistance and the switch element parallel connection, turn-off and make resistance string link resonant network to consume the residual amount of energy of resonant network through controlling this switch element.In step 505, this energy replacement module 107 has been closed in resetting and has been opened this resonant mode transducer in the resonant circuit behind the rudimental energy at last.
And aforesaid flow process causes Q1～Q4 to be able between time interval t1 to t2, move with saturation mode, and after will further being specified in.The circuit diagram of the resonant mode transducer reset system 600 of tool serial-resonant transducer and energy replacement module in Fig. 6 A announcement example embodiment of the present invention.This serial-resonant transducer 610 has resonant mode transducer 200 components identical shown in Fig. 2 A, and this energy replacement module 620 is then according to the identical process flow operation as being disclosed among Fig. 4 A to Fig. 4 G.This energy replacement module 620 has a driver 621, a resonant mode transducer control module 623 and an accessory power supply Vcc, and wherein this driver 621 is in order to provide a drive signal S1 and remove to drive Q1 (Q4) and a drive signal S2 removes to drive Q2 (Q3).Before restarting this serial-resonant transducer 610, this energy replacement module 620 provides the drive signal of a little duty ratio to work in saturation mode with control Q1～Q4.Especially, a single input (one-shot pin) 625 of this control module 623 removes to control a Dead Time (deadtime), and an Enable Pin 627 of this control module 623 removes to control the magnitude of voltage of Vcc.For instance, can be by the MC33607 of ON
manufacturing as the usefulness of this resonant mode transducer control module 623.
Fig. 6 B discloses the waveform sketch map 630 of this energy replacement module 620 in the example embodiment of the present invention.After time point t0 closed, an enable voltage Ven was provided to this control module 623 through this Enable Pin 627 at this serial-resonant transducer 610.This Enable Pin 627 is connected to the grid of a switch Qd through a resistance R d and a capacitor C d.This accessory power supply Vcc then is connected to Qd and Qs through a resistance R 1.
The acting as of this single end 625 makes output signal S1 and S2 be in low level simultaneously, with at a Dead Time that provides between S1 and the S2.This single end 625 is connected in parallel to ground wire through a resistance R o, a capacitor C o and a capacitor C s (with the Qs polyphone).
Fig. 6 B discloses the waveform of an enable voltage, switch Qs grid voltage and switch Qd grid voltage in the embodiment of the invention.In linear mode operation, this single terminal voltage is controlled to provide a normal Dead Time, and the output switch of enabling signal S1 and S2, and simultaneously main electric current promptly begins to be reversed before changing polarity.To the no-voltage mode of resonance, this converter switch cycle is set and is equal to or more than this single cycle.
For this switch Q1～Q4 is worked under the saturation mode, Qs opens between time interval t0-t1, the Co of Ro and parallel connection, and Cs has confirmed a Dead Time T2, it is greater than a normal Dead Time T1.Fig. 6 C discloses in the example embodiment of the present invention the grid voltage waveform sketch map 640 of this serial-resonant transducer 610 switch Q1～Q4 under different Dead Times operations.Under the situation of identical operating frequency; Big Dead Time T2 makes the duty ratio of output signal S1 and S2 less than the duty ratio under normal Dead Time T1 situation, thus make driving voltage value at S1, S2 at big Dead Time to the magnitude of voltage level (like 12v) that is lower than (being normal Dead Time T1) under the general operate as normal.Therefore, lower driving voltage (as～4v) make Q1～Q4 get into this saturation mode.Behind time point t1, Qs closes, and the Dead Time T1 under the given normal condition of Ro and Co, this normal Dead Time T1 make the magnitude of voltage of signal S1 and S2 be in a normal voltage levvl (like 12v).Whereby, after opening again, the electric current I Q1 of the switch Q1 of this serial-resonant transducer 610 has a small leak electric current, and less than 10A, it is by due to big T2 dead time (i.e. a little driving load) like a peak current value.In other words, previous embodiment makes this peak current IQ1 be reduced to a smaller value (as less than 10A) by a high value (as greater than 20A) through disposing a bigger Dead Time.
Fig. 7 A discloses the resonant mode transducer reset system circuit diagram 700 that has a series connection resonant mode transducer and an energy replacement module in another embodiment of the present invention.This serial-resonant transducer 710 has resonant mode transducer 200 components identical shown in Fig. 2 A.This energy replacement module 720 is then according to the identical process flow operation as being disclosed among Fig. 4 A to Fig. 4 G.This energy replacement module 720 has a driver 721, a resonant mode transducer control module 723 and an accessory power supply Vcc, and wherein this driver 721 is in order to provide a drive signal S1 and remove to drive Q1 (Q4) and a drive signal S2 removes to drive Q2 (Q3).Disclose different being with Fig. 6, the energy replacement module 720 among Fig. 7 A directly reduces the driving voltage of Q1～Q4 drive signal by means of control Vcc voltage and makes Q1～Q4 work in saturation mode.Especially, before restarting this serial-resonant transducer 710, this energy replacement module 720 controlling resistance R1 remove to control Vcc voltage.
Fig. 7 B discloses the waveform sketch map 730 of this energy replacement module 720 in another example embodiment of the present invention.After time point t0 closed, an enable voltage Ven was provided to this control module 723 through an Enable Pin 727 at this serial-resonant transducer 710.This Enable Pin 727 is connected to the grid of a switch Qd through a resistance R d and a capacitor C d.One single end 725 is connected in parallel to ground through a resistance R o and a capacitor C o.Between time interval t0 to t1, the Dead Time in the saturated mode operation keep with linear mode operation in normal Dead Time T1 identical.This accessory power supply Vcc then is connected to the inverting input of an amplifier 729 through a resistance R 3, and reference voltage Vcc_ref then is connected to amplifier 729 in-phase input ends.Fig. 7 C discloses in the example embodiment of the present invention the voltage waveform view 740 of this serial-resonant transducer 710 switch Q1～Q4 under different R1 operating and settings.Before time point t0, the Qd conducting makes R1 by short circuit, and in view of the above, Vcc is by R2 and R3 decision.And between time interval t0 to t1, Qd turn-offs, and Vcc is by R1, R2 and R3 decision.For instance:
When the Qd conducting,
Vcc＝Vcc_ref*(R2+R3)/R2＝12v (1)
When the Qd shutoff,
Vcc＝Vcc_ref*(R2+R3+R1)/(R2+R1)＝4v (2)
Because S1 and S2 voltage peak between time interval t0 to t1 are merely 4v, switch Q1～Q4 will be like resistance handling row to consume the resonant slots energy.Because lower driving voltage effect, wherein the peak current value of switch (like Q1) is lowered as reducing to and is lower than 10A.The foregoing description also can reduce to a smaller value (as less than 10A) by a higher value (as greater than 20A) with the peak current of switch Q1～Q4.
Fig. 8 A discloses the resonant mode transducer reset system circuit diagram 800 that has the serial-resonant transducer in the example embodiment of the present invention.Because this embodiment does not need special transducer control method, the control system of any existence (not shown) is combining to serial-resonant transducer all.One big resistance is added into this serial-resonant transducer to consume the resonant slots energy.For instance, a resistance R and this resonant slots 203 are connected in series, and a switch Qs is then parallelly connected with this resistance R.This resistance R can be made up of one or more resistance.Fig. 8 B discloses the operating system sketch map 820 of the system circuit diagram 800 of Fig. 8 A in the example embodiment of the present invention.In this embodiment, this serial-resonant converter circuit system 800 includes a driver, and this driver also includes a control module and is coupled to this resistance R and switch Qs.Between time interval t1 to t2, when Q1/Q4 closed, Q3/Q2 was unlocked (1); Perhaps (2) when Q3/Q2 closed, Q1/Q4 was unlocked.Simultaneously, this switch Qs closes (i.e. open circuit (open)) by this control module, and this resistance R is in consumption resonant slots energy under the normal operating state at Q1～Q4.After t3 restarted this resonant mode transducer constantly, Qs Be Controlled module started (promptly closed circuit (close)) with this resistance R short circuit.
The demonstration system of disclosed discussion and application technology can be provided in to restart the preceding short-cut method that consumes resonant mode converter circuit interior resonance groove energy of resonant mode transducer.Through this resonant circuit 101 of assembly and an energy replacement module 107, this resonant mode transducer can be before restarting, and restriction or elimination remain in the energy in the resonant network.Therefore, example embodiment of the present invention is meeting the change frequency scope and is designing under the consideration, can when restarting, avoid the problem of the peak current of contactor, and reach low consumed effect.
Aforesaid advantage all can be overlapped the assembly that is used for the resonant mode transducer, comprises like LLC, LCC, parallel connection, series connection, series parallel resonance and combination person thereof, but is not limited to this.Moreover; The DC current gain of control resonant mode transducer is with the program of the resonant slots energy that consumes the resonant mode transducer before this is described in replacement resonant mode transducer, more can be further through software, hardware, firmware or combine software and/or firmware and/or hardware to carry out.Through this program, the rudimental energy in resonant network is promptly effectively limited and is eliminated before replacement resonant mode transducer.But and in this described program also application specific integrated circuit (Application Specific Integrated Circuit, ASIC) and field programmable gate array (FieldProgrammable Gate Array FPGA) waits and to reach.
Technology of the present invention has practicality, novelty and progressive, files an application in accordance with the law.Can appoint by those skilled in the art even if the present invention has been described in detail by the above embodiments and to execute that the craftsman thinks and be to modify as all, yet not take off as attaching the scope of claim institute desire protection.
Claims (19)
1. remapping method that is applied to the resonant mode transducer, it comprises step:
Close a resonant mode transducer; And
Through being refitted in the rudimental energy in the resonant circuit of closing the resonant mode transducer, with a peak current that is generated in the switching circuit that limits this resonant mode transducer.
2. remapping method as claimed in claim 1, this energy of wherein resetting also comprises step: control one or more resistance in this resonant mode transducer, to consume this rudimental energy.
3. remapping method as claimed in claim 2, control wherein that one or more resistance also comprise the following step in this resonant mode transducer:
One or more switch elements of this switching circuit are worked in the saturation mode.
4. remapping method as claimed in claim 3, one or more switch elements of this switching circuit are moved also comprise in a saturation mode the following step at least one of them:
One drive signal of this switching circuit is provided, the duty ratio of this drive signal when the duty ratio of this drive signal was less than operation in a normal mode when it was moved in a saturation mode; And
Reduce the driving voltage deliver to this switching circuit, so that the driving voltage of this switching circuit when this driving voltage moves in a normal mode less than it when in a saturation mode, moving.
5. remapping method as claimed in claim 1 also comprises step:
After being refitted in the rudimental energy of closing in the resonant circuit, this resonant mode transducer of resetting.
6. reset apparatus that is applied to a resonant mode transducer, this resonant mode transducer comprises a switching circuit and a resonant circuit, and this reset apparatus comprises:
One control module is coupled to this switching circuit, and is closed this switching circuit of back control in this resonant mode transducer, with through being refitted in rudimental energy in the buttoned-up resonant mode transducer, and limits a peak current that is generated in this resonant mode transducer.
7. reset apparatus as claimed in claim 6, wherein this control module is through controlling in this resonant mode transducer one or more resistance to consume this rudimental energy.
8. reset apparatus as claimed in claim 7, wherein in this resonant mode transducer one or more resistance also comprise following at least one of them:
One or more switch elements in this switching circuit, this this switch element of control module control runs in the saturation mode.
9. reset apparatus as claimed in claim 7; Wherein this resonant circuit also comprises one or more resistance, an electric capacity, an inductance and a switch element; Wherein this resistance is connected with this electric capacity and this inductance; This switch element is parallelly connected with this resistance, and this control module is closed this switch element of back control in this resonant mode transducer, with rudimental energy in the buttoned-up resonant mode transducer of resetting.
10. reset apparatus as claimed in claim 8, wherein this control module assembly moves one or more switch elements of this switching circuit in a saturation mode, its through the following step at least one of them:
One drive signal of this switching circuit is provided, the duty ratio of this drive signal when the duty ratio of this drive signal was less than operation in a normal mode when it was moved in a saturation mode; And
Reduce the driving voltage deliver to this switching circuit, so that its this driving voltage driving voltage when in a normal mode, moving when in a saturation mode, move.
11. reset apparatus as claimed in claim 6, this resonant mode transducer also comprises:
One transformer is coupled to this resonant circuit and receives the output of this resonant circuit; And
One rectification circuit is coupled to this transformer, and the output of reception and this transformer of rectification is to produce the output of this resonant mode transducer.
12. reset apparatus as claimed in claim 6, wherein this resonant mode transducer is one or its combination of a LLC resonant mode transducer, a LCC resonant mode transducer, a parallelly connected resonant mode transducer, a series connection resonant mode transducer.
13. a resonant mode transducer comprises:
One switching circuit receives an input voltage;
One resonant circuit is coupled to this switching circuit, receives the square-wave signal that this switching circuit produces;
One transformer is coupled to this resonant circuit and receives the output of this resonant circuit;
One rectification circuit is coupled to this transformer, and the output of reception and this transformer of rectification is to produce the output of this resonant mode transducer; And
One driver; Be coupled to this switching circuit and this resonant circuit and control this switching circuit or this resonant circuit; After being closed, through being refitted in rudimental energy in the buttoned-up resonant mode transducer, and limit a peak current that is generated in this switching circuit in this resonant mode transducer.
14. resonant mode transducer as claimed in claim 13, wherein this driver comprises a control module, controls this switching circuit, and is closed this switching circuit of rear drive in this resonant mode transducer, and it is run in the saturation mode.
15. resonant mode transducer as claimed in claim 14; Wherein this control module is controlled a drive signal of this switching circuit; One Dead Time of the drive signal through controlling this switching circuit, and short when the duty ratio of this drive signal works in a normal mode than this transducer when this resonant mode transducer is moved in a saturation mode.
16. resonant mode transducer as claimed in claim 14, wherein this control module is controlled to a driving voltage of this switching circuit, so that its this driving voltage when a saturation mode works in when the normal mode little than this transducer.
17. resonant mode transducer as claimed in claim 13, wherein this resonant circuit also includes:
One resonant inductance;
One resonant capacitance;
At least one resistance is connected in series with this resonant inductance;
At least one switch is connected in parallel with this at least one resistance; And
Wherein this driver comprises a control module, is coupled to this at least one resistance and this at least one switch.
18. resonant mode transducer as claimed in claim 17, wherein this control module is closed this at least one switch after this resonant mode transducer is closed, and makes the energy in this this resonant circuit of at least one resistance consumption; And this this at least one switch of control module unlatching, with under one zero initial conditions, restart a normal running.
19. resonant mode transducer as claimed in claim 13, wherein this resonant mode transducer is one of a LLC resonant mode transducer, a LCC resonant mode transducer, a parallelly connected resonant mode transducer, a series connection resonant mode transducer or its combination.
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| CN201010538319.1A CN102468759B (en) | 2010-11-01 | 2010-11-01 | Resonant converter, and resetting method and device thereof |
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| CN201010538319.1A CN102468759B (en) | 2010-11-01 | 2010-11-01 | Resonant converter, and resetting method and device thereof |
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Cited By (1)
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| CN103904757A (en) * | 2012-12-31 | 2014-07-02 | 比亚迪股份有限公司 | Wireless charging system of electric automobile |
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