Electric golf car with low-speed regenerative braking
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02P-007/42
H02P-005/34
출원번호
US-0262224
(2002-10-01)
발명자
/ 주소
Cochoy, John
Hearn, Carlton W.
출원인 / 주소
Textron Inc.
대리인 / 주소
Harness, Dickey & Pierce, P.L.C.
인용정보
피인용 횟수 :
15인용 특허 :
4
초록▼
A control system for an electric vehicle, such as a golf car, that includes a plurality of power MOSFETs. The vehicle includes a shunt wound motor including an armature coil and a field coil. One of the MOSFETs is connected in parallel across the armature coil and another MOSFET is connected in seri
A control system for an electric vehicle, such as a golf car, that includes a plurality of power MOSFETs. The vehicle includes a shunt wound motor including an armature coil and a field coil. One of the MOSFETs is connected in parallel across the armature coil and another MOSFET is connected in series with the armature coil. The MOSFET across the armature coil includes a freewheel diode. When the motor is operating below its base speed, i.e., when the back EMF is below the power supply voltage, a current flow can be induced by momentarily turning on the series MOSFET, shorting the armature coil. Because of the residual inductance in the motor, a current flow in the counter clockwise direction is initiated at which point the series MOSFET is turned off. Consequently, a large voltage spike across the motor occurs which results in current flow back into the battery pack. By quickly turning the series MOSFET on and off the current flow can be maintained, and the regenerative braking can occur even at slow speeds. The control system also allows the vehicle to be operated at speeds below its base speed, and provide field current control by measuring the armature current in the negative quadrant of the field map.
대표청구항▼
A control system for an electric vehicle, such as a golf car, that includes a plurality of power MOSFETs. The vehicle includes a shunt wound motor including an armature coil and a field coil. One of the MOSFETs is connected in parallel across the armature coil and another MOSFET is connected in seri
A control system for an electric vehicle, such as a golf car, that includes a plurality of power MOSFETs. The vehicle includes a shunt wound motor including an armature coil and a field coil. One of the MOSFETs is connected in parallel across the armature coil and another MOSFET is connected in series with the armature coil. The MOSFET across the armature coil includes a freewheel diode. When the motor is operating below its base speed, i.e., when the back EMF is below the power supply voltage, a current flow can be induced by momentarily turning on the series MOSFET, shorting the armature coil. Because of the residual inductance in the motor, a current flow in the counter clockwise direction is initiated at which point the series MOSFET is turned off. Consequently, a large voltage spike across the motor occurs which results in current flow back into the battery pack. By quickly turning the series MOSFET on and off the current flow can be maintained, and the regenerative braking can occur even at slow speeds. The control system also allows the vehicle to be operated at speeds below its base speed, and provide field current control by measuring the armature current in the negative quadrant of the field map. 0, Deamer; US-5806181, 19980900, Khandros et al.; US-5832601, 19981100, Eldridge et al.; US-5834946, 19981100, Albrow et al.; US-5838060, 19981100, Comer; US-5838072, 19981100, Li et al.; US-5844803, 19981200, Beffa; US-5848467, 19981200, Khandros et al.; US-5854507, 19981200, Miremadi et al.; US-5878486, 19990300, Eldridge et al.; US-5885849, 19990300, DiStefano et al.; US-5892287, 19990400, Hoffman et al.; US-5897326, 19990400, Eldridge et al.; US-5900738, 19990500, Khandros et al.; US-5905382, 19990500, Wood et al., 324/755; US-5915752, 19990600, DiStefano et al.; US-5927193, 19990700, Balz et al.; US-5929651, 19990700, Leas et al.; US-5936847, 19990800, Kazle; US-5942246, 19990800, Mayhew et al.; US-5943213, 19990800, Sasov; US-5949246, 19990900, Frankeny et al.; US-5950070, 19990900, Razon et al.; US-5950304, 19990900, Khandros et al.; US-5959462, 19990900, Lum; US-5977640, 19991100, Bertin et al.; US-5984691, 19991100, Brodsky et al.; US-6002178, 19991200, Lin; US-6024275, 20000200, Takiar; US-6032356, 20000300, Eldridge et al.; US-6034332, 20000300, Moresco et al.; US-6046600, 20000400, Whetsel; US-6049467, 20000400, Tamarkin et al.; US-6050829, 20000400, Eldridge et al.; US-6053395, 20000400, Sasaki; US-6064213, 20000500, Khandros et al.; US-6069026, 20000500, Terrill et al.; US-6080264, 20000600, Ball; US-6080494, 20000600, Abbott; US-6082610, 20000700, Shangguan et al.; US-6083773, 20000700, Lake; US-6098278, 20000800, Vindasius et al.; US-6101100, 20000800, Londa; US-6104202, 20000800, Slocum et al., 324/754; US-6133070, 20001000, Yagi et al.; US-6136681, 20001000, Razon et al.; US-6137299, 20001000, Cadieux et al., 324/754; US-6147400, 20001100, Faraci et al.; US-6154371, 20001100, Oba et al.; US-6218910, 20010400, Miller; US-6242279, 20010600, Ho et al.; US-6242932, 20010600, Hembree; US-6246247, 20010600, Eldridge et al.; US-6275051, 20010800, Bachelder et al.; US-6281046, 20010800
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이 특허에 인용된 특허 (4)
Jimbo Yoshiji (Katsuta JPX) Amikura Seiki (Katsuta JPX), Control apparatus for electric vehicles.
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