WO2003107510A2

WO2003107510A2 - Single body motor/generator dual function device

Info

Publication number: WO2003107510A2
Application number: PCT/US2002/015155
Authority: WO
Inventors: Show-Jong Yeh; Yu-Ta Tu
Original assignee: Sunyen Co., Ltd.
Priority date: 2002-06-14
Filing date: 2002-07-19
Publication date: 2003-12-24
Also published as: GB2405266A; WO2003107510A3; GB0426720D0; JP2006505234A; DE10297746T5; AU2002367746A1; JP4372003B2; GB2405266B; CN1306685C; CN1636306A

Abstract

A dual function motor/generator includes a rechargeable battery, a mode switching device, a dual function rotor/stator structure, at least two transmission devices and a clutch device for selecting one of the two, transmission devices depending on whether a motor or generator mode is selected. When the dual function motor/generator is used as a motor, power is supplied from the rechargeable battery controlled by the mode switching device to a driven load through the rotor/stator structure and one of the taansmission devices, and when used as a generator, the battery is recharged by applying an external force to the load such that the load drives the other transmission device to rotate the rotor in a direction opposite a direction of rotation of the rotor in the motor mode, and thereby induce an electric current in the rotor/stator structure to recharge the battery.

Description

Single body motor/generator dual function device

BACKGROUND OF THE INVENTION

I, Field of the Invention

The invention related to a djiial --unction motor/generator device, and particularly to a single device having dual functions of being able to be us^d as a motor and generator.

Description of the Related Art

Conventionally, an engine or a motor drives an apparatus using an additional power system for supplying electricity. Driving of the load, which is achieved by sucfr engihe and motor, normally needs individual generator means and driving apparatus,. Therefore-- it requires tremendous space and has a high cost. Moreover, it s poor industrial a pHca ihty-

To solve the problems j-nentioned above, a motor with one additional armaturp and one additional winding thereon associated with- switching device has been developed and produced to add generator fttnetions to the motor. HoweVer, the hange of connection between motor and generator circuits causes electrical problems, and the manufacture of motor with one' addition l armature and! one winding thereon is complicated, is subject to manufacturing defects and increases the manufacturing cøst. Consequently, it has been desired to develop a single device having dual -functions of being able to be used as both a motor and a

SUMMARY OF THE INVENTION

An object of the p-resent invention is, therefore, to provide a single device having the dual functions of being able to be used as a motor and a generator without any of the prόblen s mentioned above. The invention provides a single, shared component piotor/genera br 4ual function device comprising a rechargeable, battery, a switehi-ig means, a dual function

two transmission devices-and a brward/reverse clutch means for alternately engaging said transmission devices. When the dual function motoι-/generatpr means i$ used as a motor_s power is supplied from the rechargeable battery under control of a swftbhh-g means to tlr-e stator or rotor and tό_^a driven lo d thi-ough first transmission device selected by the forward/reverse clutch means, and when useα^* .as a generator, the battery is recharged by apt-lying an external -force to the driven load, such that the load drives a second transmissiQn device to drive the rotor in a direction opposite the first direction of rotation when operated as a motor, and induce an. electromotive force through magnetic coupling between the statpr and rotor to recharge the batter^.

It is also an object of the present invention td provide a single body motor/generator dual function device co rising a rechargeable battery, a -switching means, a dual function motor/generatpr means including a rotor and stator, and rotor rotating-direction selection means, wherein the stator is made from permanent magnetic material and the rotor 1-jas coil windings.

Another object of the present invention is to provide a single body -nOtor/generatpr dual function device of the above-mentioned type, wherein the stator is made from permeable material wound by coil windings and the rotor is rnade frorn permanent magnetic material.

According to another aspect of the present invention there is-provided a single body rnotør/generatOr dual funςtion device, wherein the stator and TQtoi are both fnade froin permeable material wound by coil windings, and the device further comprises at least a starting switch, a feedback switch, and a rectifier. The two switches are initially closed at the same t me wj-eή the device fe used as a generator. The rechargeable battery provides a potential to windings <->f the rotor throu h the starting switch, and the induced potential -hrther contributies to the .magnetic fjeld of the stator/rotor structure. As the rotor moves in a pre-deter ined direction relative to the, statof a first portion of the electrornotive forςe induced by the magnetic field feeds bac- to the coil windings of file rotor through the rectifier and the feedback swftch. Then, the starting switch is openeα- and the main portion of the electromotive force is used to- charge the battery through the above-described switching means hile the first portion of the electromotive force continues to be fed back to the rojtor winding. The starting switch remains opened #fter starting until stoppa e of the external force applied to the driven load. ϊn accordance with a further aspept of the present invention there is provided a single body motor/generator dual function device of the above-desprjbed: type that further includes a oϋfferential, torque converter, dnd/or additional transmission device for enabling a change of torque, velocity, dl ectipn, or other required --unctions.

Furthermore, according to- another aspect of the present invention there is provided a single body motor/generator dual function device of the above-described ty e, wherein the rotating-direction selection jneans can interlock with the switching means or be independently pontroHed.

Other objects, features and advantages of the present invention will become apparent to those skilled in the art front the following det il d description.

Brief Description of the Drawing

figure 1 is a schematic drawing of the singje bo4y moto /genepator dual function device accosting to a first erάbodiment of the present invention.

figure 2 i$ a Schematic drawing of the sihgle body rnotor/generator dual function device according to a -fecon^ embodiment of thei preseht invention. Figure 3 is a schematic drawing of the single body motor gene ator dual function device according to a 1hird embodiment of the present invention.

DETAILED DESCRIPTION OF

EMBODIMENTS

A single body motor/generator dual functipn device^ s shown in Figure 1, includes a dual-functional motor/generator de ice 1, a Switching eans 2 for switching between a motor mode and a generator mode, a rechargeable battery 3, a first transmission device 4A* a second transmission device 4B, a difierential or third transmission device 4C and a fprwat*d/reverse clutch means 5. The duakfrinctional motor/generator device 1 has a §tatpr 11 made from a perinanent niagnet, a rotor 12 wound by coil windings, a brush 13 and a commutator 14. The two ends bf shaft 15 of the, rotor 12 connect with the differential 4C through the first transmission device 4A and the second transmission device 4B respectively. The differential 4C connects with a load 6 such a-, a wheel.

The switching means 2 includes a switch and preferably controls the forward/reverse clutch means 5 through an interlock control device (not shown). Namely, the forw-ird reverse clutch means 5 is changed to a first position, in wjhich the second transmission device 4B is engaged, through the interlock control deviςe when the switching nreans 2 is located at the motor-driving position B. The forward/reverse ølutch means 5 is changed to a second position, jn which transmission device ,4A is e gage l, through the interlock control device when the switching means 2 is located at the generator position A and simultaneously the driven load 6 rotates. Alternatively, the switching means 2 and the forward/reverse clutch means 5 can be operated individually.

A rectifier 3A and voltage/current regulator 3B can be set at the front of the rechargeable battery 3. The dual-functional motor/generator device 1 is eonne-cted to a driving contrpller such as speed regulatof 7 so aS to control the velocity of shaft 15. It will be appreciated that speed regulator 7 xaaf provide all necessary motor driving and control functions including starting and stopping control, torque regulation, phase control, voltage and current control, and so forth.

When the switching means 1 is located at the motor-driving position B for selecting a motor mode, the rechargeable battery 3 supplier powe through speed regulator 7, a connecting wire , brush 13, and commutator 14 to the coil windings of rotor 12 of the dual-fimctional motor/generator device 1 so as to apply an electromotive force which causes the røtor 12 to rotate due to magnetic coupling with the magnetic field of permanent magnet 11, in a pre-deter ined first direction such as clockwise. At this stage, according to Fleming's Left Hand Rule, tfye dual-functional motor/generator device 1 is used as a motor so as to drive the franSmission device 4B by p-ieans of shaft 15,- and then to drive he driyeii load 6 through differential 4C. Furthόr, th$ differential 4C may have functions for controlling torque./ velocity, direction Or other required functions. When the switching means 2 is located at the generator position A for selecting a generator mode, the forwarqVfeverse clutch means 5 is simultaneously changed to another location by interlocking or other operation. The driven load. 6 rotates upon application of an external force, and the transmission device 4 A engages shaft 15. Thereby, the rotor 12 rotates in a second direction opposite the direction of position B, and an electromotive force is generated by coupling between the magnetic fiel of permanent magnet 11 and the magnetic field induced in the (-_joil winding of rotor 12. At this stage, according to the Fleming's Left fe-and Rule, the dual-functional motor/generator device 1 is used as an electric generator. The resulting electromotive force ϊέ cpupled thtough commutator 14 and brusfh 13, and the voltage output through brus 13 is supplied to a connecting Wire W and switching means 2 at pbsition A and then c-frectly to rectifier 3A. Further, the voltage is adjusted into a stable ahd specific voltageVcurrent through voltage/current regulator 3B ar- then applied to recharge the rechargeable battery 3.

The drawing shown in Figure 2 is the illustration of the second embodiment according to the preseht invention. The same symbols of elemehts have; the same meahing as shown on Figure 1. In this embodiment, all elemepts are the same except that the stator includes a coil winding 11A wound on a magnetically permeable material 11B, and the rotor is made from a permanent magn t, coil v-findihg 11 A being connected directly to wire W without the commutator and brus

When switching means % is located at the motpr-driving position , the rechargeable battery 3 supplies power through speέd regulatp-r¹ 7 to coil winding 11A of the stator to generate a m gnetic field which couples with the ma ic field of the permanent magnet of rotor 12 and thereby causes the rotor to rotate so as to drive the trar-srnissioh device 4p. Subsequently, the driven load 6 rotates through differential 4C.

When the switching means 2 is located at generator position A, the forward reverse clutch means 5 is changed to a second position. Then, when the load 6 is rotated by applying an external force,, in the same manner as embodiment 1, the rotpr 12 rotates in a second direction Opposite to the motor-driving direction by means of rotation of the transmission device 4A, and generates an electromotive force induced by the coupling of the magnetic field of permanent magnet II A with the magnetic field of the coil winding. Subsequently, the electromotive fo ce recharges the rechargeable battery 3.

The rawing shown in Figure 3 i& the third embodiment according to the present invention, in which the structure of stator is the same as embodiment 2, and the rotor is wound with coil winding 12B located on magnetically permeable material 12C. Further, this embodiment includes a rectifier 8, and a starting switch $. The coal winding 1IB of the stator connects with the input of the rectifier 8 through the first wire WR1. I e output of rectifier $ chnnects with starting switch 9 through the second wire WR2. The starting switch ^ consists of a starting switch $W1 and a feedback switch SW2, which connect with bru?h 13 through the starting power line WS. When used aS a motor, in th, same manner as the embodiment mentioned ahόve, rechargeable battery 3 supplies power through speed regulator 7 to coil i di 11 A of the stator to generate a magnetic field which couples with the magnetic field induced in t e coil winding and permeable magnetic material of rotor 12. Thereby, the fotόr rotates ifr a predetermined first direction so as to drive the fr- smission device 4B.

However, when the motor/generator device is used as an electric generator, the switching means 2 is S t at the position A and simultaneously causes the switches l and SW2 to be initially closed. The rechargeable battery 3 supplies a voltage to coil windings 12 B of the rotor through the starting power line WS, brush 13 and rectifier 1 , and thereby generates a magnetic field. The rotor thus rotates in a predetermined second direction ppposite the first direction ,and causes a magnetic field to be induced in the stator. The resulting coupling of the stator and rotor fields causes an elechomotive fprce to be generated in the stator winding 1 Ϊ- _* portioh of the resulting electromotive force is transn itted to the rectifier 8 through the first wire R1 and fed back to rotor 12B through the second wire WK2, switch SW2 and Starting wire WS so that electric power is generated continuously. At this stage, the starting switch SW1 may be opened On the other hand, the feedback switch remains in a closed condition to continue to supply power to the rotor and the main portidp of power is supplied to the battery through switching means 2 until the e ernal force applied to driven load 6 is stopped, ana^* then starting switch SW1 is closed again during re-start;. In accordance with the illustration of embodiments mentioned above, the technical concept, according to the present invention, is to provide a single motor/generator dual function device cop-prising a rechargeable battery, a switching means; transmission devices, forward/reverse clutch means, and a driven load by using the principle of nature that a t r rotates in one direction but an electric generator rotates in an opposite direction.

It should be understood, however, that the detailed description and specific examples, While indicating preferred e bodiments of the present invention, are given by way of illustration and not limitation. Many c an es and modifications, such as adding an indicator Of current to the rechargeable battery 3, optionally including an over-charging device, battery, etc., or any Modification of the frar-^miSsion device, connecting means and so on are within the scope of the jpre^ent invention and may be made without dera in from the spirit thereof, and the invention includes all such modification.

Reference Characters of the Drawing

1 dual function motor/generator meari

2 switch-ngmeans

3 rechargeable battery

4A, 4B, 4C transmission device

5 forward reverse clutch means (rotating direction selection device)

6 driven load

7 speep. regulator

8 rectifier

9 starjing switch

il

Claims

What is claimed is:

1. A single body motor/generator dual function device comprising a rechargeable battery, a ^witching- means for switching between a motor mode anq¹ a generator mode, a rotor and stator structure including a rotor and a stator, at least two fransn-ission devices and a forward/reverse clutch means for selecting one of said two transrnission devices corresponding to a selected one of said modes, wherein when the switching means is located at a first position, the rotor and stator structure is used as a motor, wherein power is supplied frpm the rechargeable battery to a driven load through the rotor add stator structure and one of the transmission ø-evices, ^^ _when the switching means is located at the second position, the rotor and έtator structure is us_jed as a generator, wherein the battery is rechargέd upon applying externaj force to the load and selecting the other of said two tøn$mission vices such that the load drives the transmission device to rotate the rotor and induce an electromotive force that recharges the battery.

2. The single body motor/generator dual -unction device as claimed in claim 1, wherein the stator is made from permanent magnetic material and the rotor has coil windings.

3. The single body møtof/generator dual function device as claimed in claim 1, wherein the stator is made from permeable material wound by coil windings and the rotor is rnade from permanent rhagnetic material.

4. The single body mptor/generator dual function device as claimed in claim 1, wherein the stator and rotor are both ade from permeable material wound by coil windings, and the device - ϋther comprises at least a starting switch, a feedback switch find a rectifier^ Whefein the two switches are initially closed at the s^rne time when the device is used as a generator and an extei-nal force is applied to the load, at which time the rechargeable battery provides a potential to windings o-^the rotor through the starting switchand causes the rotor to move in a pre-detemiined direction relative to the stator, and wherein a first portion of electromotive force induced in the stator windings is fed back to the coil windings of the rOtor through the rectifier and the feedbac-k switch, and wherein the Starting switch is then opened so that the main portion of the electromotive force is supplied to the battery through the switching means while the first portion of the electromotive force continues to be fed back to the coil windings of the rotor to generate power by induction until the stoppage of the external force applied to the load.

5. The single body motor/generator dual function device as claimed in any one of claims 1 tα 4, further comprising a differential, torque converter, third transmission device or a Combination of the differential, tprqiie converter of third transmission device for providing a change of torque, velocity, direction or other required -functions.

6. The single body motor/generator dual function device a-, claimed in claim 1, wherein the forward/reverSe clutch means is interlocked with the switehing means,,

7. The single body motor/generator dual function device as clain-ted in claim 1, wherein the foi-warαTre verse clutch means is controlled independently of the switching means.