DRIVE SYSTEM FOR ELECTRIC VEHICLE AND ELECTRIC VEHICLE PROVIDED WITH THE SAME

• Main Authors: KUSHIDA TAKATOSHI, SUGIMOTO SHINJI, ITO HIROTAKA, FUJII KATSUHIKO, HARA TAKEKI
• Format: Patent
• Language: English; Japanese
• Published: 19.12.2023
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL

To provide a drive system which controls so as to satisfy a required brake torque even in a coil switching period during regeneration of a rotary electric machine.SOLUTION: A drive system for an electric vehicle includes an inverter 3 which supplies an electric power to a rotary electric machine 1, a mechanical type coil switching device 8 which switches a connection state of a rotary electric machine 1 when a rotation speed of the rotary electric machine 1 arrives at a rotary speed threshold and a controller 4 which controls the rotary electric machine 1, the inverter 3 and the mechanical type coil switching device 8. The controller 4 includes an inverter control device 9, a coil switching control device 10 which controls the mechanical type coil switching device 8 and a mechanical brake control device 11 which controls a mechanical brake 16. The inverter control device 9 controls so as to turn the inverter 3 off when switching connection state of the rotary electric machine 1. The mechanical brake control device 11 causes the mechanical brake 16 to compensate a regeneration brake torque of the rotary electric machine 1 which disappears due to turning-off of the inverter 3 upon regeneration state of the rotary electric machine 1.SELECTED DRAWING: Figure 1 【課題】本発明は、回転電機の回生中の巻線切替期間においても要求ブレーキトルクを満たすように制御する。【解決手段】回転電機１に電力を供給するインバータ３と、回転電機１の回転速度が回転速度閾値に達した場合に、回転電機１の結線状態を切り替える機械式巻線切替装置８と、回転電機１とインバータ３と機械式巻線切替装置８を制御するコントローラ４と、を備える。コントローラ４はインバータ制御装置９と、機械式巻線切替装置８を制御する巻線切替制御装置１０と、機械式ブレーキ１６を制御する機械式ブレーキ制御装置１１とを備える。インバータ制御装置９は、回転電機１の結線状態切替え時に、インバータ３をオフするよう制御する。機械式ブレーキ制御装置１１は、回転電機１が回生状態時に、インバータ３のオフによって消失する回転電機１の回生ブレーキトルクを機械式ブレーキ１６に補償させる。【選択図】図１