CN102177766B - Driver circuit for a semiconductor light source (led) - Google Patents
Driver circuit for a semiconductor light source (led) Download PDFInfo
- Publication number
- CN102177766B CN102177766B CN200980139778.8A CN200980139778A CN102177766B CN 102177766 B CN102177766 B CN 102177766B CN 200980139778 A CN200980139778 A CN 200980139778A CN 102177766 B CN102177766 B CN 102177766B
- Authority
- CN
- China
- Prior art keywords
- driving circuit
- switching regulaor
- led
- voltage
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/401—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37036—Position normally, stop, measure position tool with second independent sensor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37559—Camera, vision of tool, compute tool center, detect tool wear
Abstract
The invention relates to a halogen replacement lamp (1) comprising a driver circuit (2) for a semiconductor light source (LED). The driver circuit (2) in turn comprises a switching controller (3) to which a power factor controller (PFC) is connected upstream. The power factor controller (PFC) is dimensioned such that the driver circuit (2) having a connected semiconductor light source (LED) appears as an ohmic load for a low voltage source (5) connected upstream.
Description
Technical field
The present invention relates to for driving circuit semiconductor light sources, that comprise switching regulaor, this switching regulaor has:
A) diode,
B) inductance,
C) pulse switch, and
D) for the control circuit portion of pulse switch.
Background technology
From having known LED, people make great efforts to replace halogen light-emitting device used till that time with it.LED has two significant advantage with respect to halogen light-emitting device, that is, the life-span is long and power consumption is less.
EP1147686B1 discloses the driving circuit of the semiconductor light sources especially consisting of LED for semiconductor light sources, and this driving circuit comprises the switching regulaor that is inaccessible current transformer form.The task of the driving circuit that this is known is the labyrinth of avoiding common so far.
Also cicada comprises that other halogen of LED substitutes lighting device, and it comprises step-down converter (Buck transducer) as switching regulaor.
For the known halogen that makes to comprise LED substitutes lighting device work, must supply for example low volt alternating voltage of 12V.Suggestion adopts the electronic transformer of being powered by AC network for this reason.Yet especially step-down converter is capacitive load because of needed auxiliary capacitor for electronic transformer, this may cause, and this electronic transformer is instantaneous draws high electric current from electrical network.Because most electronic transformer does not design for capacitive load, so this causes the uncontrollable high frequency interference in electrical network.
Summary of the invention
From above-mentioned driving circuit, the present invention is based on following task, design driven circuit like this, thus avoided last described shortcoming.
According to the present invention, so complete this task, before switching regulaor, be provided with a power-factor regulator (PFC), or in this switching regulaor an integrated power-factor regulator (PFC).Now, the specification of power-factor regulator (PFC) is set to, and this driving circuit shows as ohm load with the semiconductor light sources being connected for preposition voltage power supply device (especially low-voltage source or grid ac voltage).
Power-factor regulator is known and for example in GB1352464B1 and US6469917B1, describes to some extent.Power-factor regulator consists of bridge rectifier and the switching regulaor that is booster converter (booster converter) form that is connected on after bridge rectifier conventionally.The pulse switch of booster converter is so controlled conventionally, that is, the power-factor regulator of preposition alternating-current voltage source obtains high frequency input current, and its envelope forms the half-sine wave of 100Hz.Thus one, the mean value of input current is also semisinusoidal waveform and has the frequency of 100Hz.Such input current only causes little higher hamonic wave, has therefore met the required standard that limits uncontrollable interference.
Utilization, according to driving circuit of the present invention, can substitute light-emitting device to the halogen that comprises LED by the electronic transformer that is connected to alternating current pressure network and supply needed 12V alternating voltage.
This switching regulaor can be selected from:
-SEPIC
-uninsulated inaccessible current transformer,
-inverse excitation type converter (the inaccessible current transformer with potential isolation),
-step-down converter, or
-booster converter.
This switching regulaor can be worked according to critical conduction mode (boundary scheme).
This switching regulaor can be according to intermittent mode (intermittently conduction mode) work.
Another improvement project may be, before switching regulaor, is provided with an electronic transformer that will be connected to AC network, by electronic transformer, reduces line voltage, until it is this driving circuit, forms low-voltage source.
The pulsed frequency that is used for the pulse switch of power-factor regulator (PFC) should be 50KHz or 60KHz as far as possible, thereby can be formed for the above-mentioned half-sine wave of input current.
Another improvement project may be, this driving circuit is positioned in the lamp socket for this LED together with a LED or a plurality of LED.
The invention still further relates to halogen and substitute light-emitting device, it is characterized in that having the driving circuit of semiconductor light sources and the semiconductor light sources especially being formed by one or more LED and type described above.
Accompanying drawing explanation
Below with reference to accompanying drawing, embodiments of the invention are described, wherein:
Fig. 1 represents to comprise that the halogen of the first embodiment of driving circuit substitutes the first embodiment of light-emitting device; And
Fig. 2 represents to comprise that the halogen of the second embodiment of corresponding driving circuit substitutes the second embodiment of light-emitting device.
Embodiment
Fig. 1 shows halogen and substitutes light-emitting device 1, and its luminophor is for example a LED, or comprises the LED assembly of a plurality of LED.Before LED, be equipped with driving circuit 2.This driving circuit comprises the switching regulaor 3 that is step-down converter (Buck transducer) form.Active (chopping) power-factor regulator 4 is set before this step-down converter, and this power-factor regulator 4 produces corresponding DC voltage in its 12V low-voltage of supply, these direct voltage drive switching regulaor 3 work.
Active PFC is transducer, and it is conventionally given capacitor charging and has by an inductance and series circuit and for example, a switch (FET) by control circuit (preferably integrated circuit, ASIC) chopping that diode forms.
Described 12V is low, and volt alternating voltage is produced by electronic transformer 5, and this electronic transformer 5 is connected in AC network itself.If there is no power-factor regulator (PFC) 4, the step-down converter (Buck transducer) that forms switching regulaor 3 will form the capacitive load of electronic transformer 5, and this may cause, and this electronic transformer 5 is instantaneous draws high electric current from electrical network.Thus one, high frequency interference is by spuious in electrical network, and this is unallowed.Power-factor regulator (PFC) 4 has prevented this phenomenon and has been the semisinusoidal waveform with frequency 100Hz for making the mean value of the input current of driving circuit 2.Thus one, avoid spuious higher hamonic wave in electrical network as far as possible.
Fig. 2 shows the driving circuit 2 that halogen substitutes lighting device 1 slightly particularly.As light source, at this, a plurality of LED are set.The driving circuit 2 low volt alternating voltage driving work with 12V by electronic transformer 5 as in Fig. 1 again.
Low volt alternating voltage is rectified device 6 rectifications.For fear of interference, before rectifier 6, be also connected to high frequency filter 7.Alternating voltage through rectifier 6 rectifications passes through capacitor C1 by copped wave, to eliminate radio interference.In other words the DC voltage that occurs, pulse on capacitor C1.This DC voltage is supplied to switching regulaor 3.Switching regulaor 3 is comprised of inverter (also referred to as fall-booster converter or inaccessible current transformer) in the case.It is included in the tandem tap S in longitudinal branch road, is also included in the inductance L in the first transverse legs, and the diode D joining with it in longitudinal branch road, is finally included in the second capacitor C2 for copped wave in the second transverse legs.Here, feature is in particular for avoiding the power-factor regulator (PFC) 4 of spuious high frequency interference in electrical network to be so integrated in switching regulaor 3, that is, pulse switch S is common to inverter and power-factor regulator (PFC) 4.
PFC4 has the PFC regulator 4a that is for example IC form, wherein this PFC regulator 4a can be supplied to feedback signal (input voltage for example, current over-zero when switch disconnects, the output voltage of PFC), and PFC regulator 4a is identified for the switching information of switch S thus.
This switch is with the driven work of pulsed frequency of 50kHz or 60kHz.
The driving circuit that comprises switching regulaor 32 that substitutes light-emitting device 1 for halogen can so form, and can be directly connected in AC network.For its work, driving circuit 2 must be designed to have higher withstand voltage properties.In the case, user can select the substitute that whether the alternative light-emitting device 1 of halogen will be connected to electronic transformer 5 or substitute light-emitting device as high volt halogen to be directly connected to AC network.
The switch of the switch of PFC and Buck transducer is controlled by control circuit.That this control circuit can be supplied to is different, for the measuring-signal of beat, such as the output voltage of the change curve of electrical network supply voltage or zero passage, PFC, flow through the electric current etc. of the inductance of PFC.
Switching regulaor 3 can be according to discontinuous current mode (intermittently conduction mode) work.Therefore, it is preferably according to voltage-tracing work pattern (only measure output voltage or LED electric current and adjust accordingly, not needing to measure input voltage).Discontinuous current mode always has the intermittence after inductance L demagnetizationization, wherein in this intermittence, does not have electric current to flow in switching regulaor 3.In general, this inductance L when pulse switch S connects by excitation, and pulse switch S can or open when reaching predetermined current value by pulse switch S, or for example, open because regulate parameter (depending on the regulating loop for output voltage or LED electric current).Subsequently, start the demagnetization of inductance L.If demagnetizationization finishes, as mentioned above, be exactly and then temporary transient intermittence, then, this pulse switch S is switched on not only (closing) and inductance L but also by excitation.
As according to the switching regulaor of discontinuous current mode 3, for example, can adopt inaccessible current transformer, inverse excitation type converter (the inaccessible current transformer with potential isolation), step-down converter or the booster converter of non-isolation.
In inverse excitation type converter (the inaccessible current transformer with potential isolation, passes through transformer isolation), inductance (L) is the armature winding of transformer.
Switching regulaor 3 can be according to critical conduction mode work (the critical work between discontinuous current mode and non-discontinuous current mode).On the one hand, preferably measure output voltage or LED electric current and regulate accordingly, also will monitor inductance L is in which moment quilt demagnetizationization.Once find that inductance L is by demagnetization, pulse switch S is switched on.Pulse switch S can open again when reaching predetermined current value by pulse switch S, or for example, according to regulating parameter (depending on the regulating loop for output voltage or LED electric current) to open again.Can additionally there is the measurement of this input voltage.
As the switching regulaor 3 of the critical work between discontinuous current mode and non-discontinuous current mode, for example, can use inaccessible current transformer, inverse excitation type converter (the inaccessible current transformer with potential isolation), step-down converter or the booster converter of non-isolation.
In addition, when switching regulaor 3 is worked according to critical conduction mode, this switching regulaor can also have other a plurality of inductance and/or electric capacity, they utilize resonance behavior together with other existing inductance of switching regulaor and/or electric capacity under the pulsed frequency of pulse switch S, and therefore reduce switching loss.
In inverse excitation type converter (the inaccessible current transformer with potential isolation, passes through transformer isolation), inductance (L) is the armature winding of transformer.
In a simple flexible program, capacitor C2 can have only very little electric capacity, or is even saved completely.Thus one, driving circuit 2 shows as ohm load with plain mode together with connected semiconductor light sources (LED) for preposition voltage power supply device.
The adjusting of LED electric current also can be carried out in conjunction with the output voltage of grasped LED voltage or switching regulaor 3.LED voltage now can for example be realized by difference measurement, and here, two voltages in output loop are measured, and its difference shows LED voltage (for example output voltage of switching regulaor 3 and the voltage under LED).
Design driven circuit 2 like this, this driving circuit is not only connected to low-voltage source 5 or grid ac voltage, and can be by its driving work.
The driving circuit 2 of belt switch regulator 3 can be arranged on printed circuit board.
Can so form halogen and substitute light-emitting device 1, it comprises radiator, heat conduction shell and/or heat conduction lamp socket.
The printed circuit board with the driving circuit 2 of belt switch regulator 3 can heat be couple on radiator, heat conduction shell and/or heat conduction lamp socket.
Can so form halogen and substitute light-emitting device 1, all parts that are included are integrated in a common lamp socket with vial.
Can adopt for example for example E14 or E27 of B15d, BA15, GU10, GZ10, GU24 or thread lamp socket of bayonet cap.
Claims (12)
1. the driving circuit for semiconductor light sources (LED) (2), this driving circuit (2) comprises switching regulaor (3), this switching regulaor (3) has:
A) diode (D),
B) inductance (L),
C) pulse switch (S), and
D) for the control circuit portion of pulse switch (S),
Wherein, before this switching regulaor (3), be equipped with power-factor regulator (4), or in this switching regulaor (3), be integrated with power-factor regulator (4), wherein this power-factor regulator (4) is designed to, described driving circuit (2) shows as ohm load together with connected semiconductor light sources (LED) for preposition voltage power supply device, it is characterized in that, at this driving circuit (2), be provided with the electronic transformer (5) that will be connected with AC network above, by this electronic transformer, reduce line voltage, until being this driving circuit (2), this electronic transformer (5) forms low-voltage source, and described power-factor regulator (4) consists of bridge rectifier and described switching regulaor (3).
2. driving circuit according to claim 1 (2), is characterized in that, described switching regulaor (3) is selected from:
-SEPIC；
The inaccessible current transformer of-non-isolation;
-inverse excitation type converter, this inverse excitation type converter is the inaccessible current transformer with potential isolation;
-step-down converter; Or
-booster converter.
3. driving circuit according to claim 2, wherein, described switching regulaor (3) is with boundary scheme work.
4. driving circuit according to claim 2, wherein, described switching regulaor (3) is with conduction mode work at intermittence.
5. according to the driving circuit described in any one in claim 1 to 4 (2), it is characterized in that, described power-factor regulator (PFC) is integrated in described switching regulaor (3), wherein, described pulse switch (S) is common to described power-factor regulator (PFC) and described switching regulaor (3).
6. driving circuit according to claim 1 (2), it is characterized in that, at described switching regulaor (3), be provided with the electronic transformer (5) that will be connected with AC network above, by this electronic transformer (5), reduce line voltage, until this electronic transformer is configured to the low-voltage source of described driving circuit (2).
7. driving circuit according to claim 1 (2), is characterized in that, for the pulsed frequency of the pulse switch (S) of described power-factor regulator (PFC) higher than 50KHz.
8. driving circuit according to claim 1 (2), is characterized in that, described driving circuit is arranged on the lamp socket for this LED together with LED.
9. driving circuit according to claim 1 (2), wherein, described voltage power supply device is low-voltage source (5) or grid ac voltage.
10. for an operating means for light-emitting device, this operating means has according to the driving circuit described in any one in claim 1 to 9.
11. operating means for light-emitting device according to claim 10, wherein, described light-emitting device is LED.
12. 1 kinds of halogens substitute luminophors (1), it is characterized in that, this halogen substitutes that luminophor (1) has semiconductor light sources (LED) and according to the driving circuit described in any one in claim 1 to 9 (2).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202008013397U DE202008013397U1 (en) | 2008-10-09 | 2008-10-09 | Driver circuit for a semiconductor light source (LED) |
| DE202008013397.1 | 2008-10-09 | ||
| PCT/EP2009/007264 WO2010040542A1 (en) | 2008-10-09 | 2009-10-09 | Driver circuit for a semiconductor light source (led) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102177766A CN102177766A (en) | 2011-09-07 |
| CN102177766B true CN102177766B (en) | 2014-02-26 |
Family
ID=42055434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980139778.8A Expired - Fee Related CN102177766B (en) | 2008-10-09 | 2009-10-09 | Driver circuit for a semiconductor light source (led) |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102177766B (en) |
| DE (2) | DE202008013397U1 (en) |
| WO (1) | WO2010040542A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2936932B1 (en) * | 2012-12-21 | 2020-07-22 | Tridonic GmbH & Co. KG | Radio transmission between modules in a potential-separated led converter |
| TWI505748B (en) * | 2013-06-18 | 2015-10-21 | Univ Ishou | Light emitting diode driving circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5661645A (en) * | 1996-06-27 | 1997-08-26 | Hochstein; Peter A. | Power supply for light emitting diode array |
| CN101199239A (en) * | 2005-03-22 | 2008-06-11 | 美国快捷半导体有限公司 | Single-stage digital power converter for driving LEDs |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL39348A (en) | 1971-06-25 | 1977-06-30 | Stauffer Chemical Co | N-t-butyl-alpha-(3,5-disubstituted phenoxy)butyramides and their use as herbicides |
| WO2001005193A1 (en) | 1999-07-07 | 2001-01-18 | Koninklijke Philips Electronics N.V. | Flyback converter as led driver |
| US6469917B1 (en) | 2001-08-16 | 2002-10-22 | Green Power Technologies Ltd. | PFC apparatus for a converter operating in the borderline conduction mode |
| PT1984667T (en) * | 2006-02-10 | 2018-01-03 | Philips Lighting North America Corp | Methods and apparatus for high power factor controlled power delivery using a single switching stage per load |
-
2008
- 2008-10-09 DE DE202008013397U patent/DE202008013397U1/en not_active Expired - Lifetime
-
2009
- 2009-10-09 WO PCT/EP2009/007264 patent/WO2010040542A1/en active Application Filing
- 2009-10-09 CN CN200980139778.8A patent/CN102177766B/en not_active Expired - Fee Related
- 2009-10-09 DE DE112009002150T patent/DE112009002150A5/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5661645A (en) * | 1996-06-27 | 1997-08-26 | Hochstein; Peter A. | Power supply for light emitting diode array |
| CN101199239A (en) * | 2005-03-22 | 2008-06-11 | 美国快捷半导体有限公司 | Single-stage digital power converter for driving LEDs |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102177766A (en) | 2011-09-07 |
| DE202008013397U1 (en) | 2010-03-25 |
| DE112009002150A5 (en) | 2011-09-29 |
| WO2010040542A1 (en) | 2010-04-15 |
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Granted publication date: 20140226 Termination date: 20191009 |
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