Controlling device for electric motor vehicle

Abstract

Abstract PURPOSE: To reduce the number of equipment used in a main circuit by a method wherein a high speed current reducing device for regeneration is also used as a chopper shortening switch when a vehicle is on a power run. CONSTITUTION: When the vehicle is on a power run, cam switches P1 and P2 are closed and current supply to a motor M is controlled by a chopper CH. When the revolution of the motor M increases to cause the current flow rate through the chopper CH to approach 1, a chopper shortening command signal closes a high speed current reducing device or breaker L3. Application of a brake closes cam switches B1 and B2 and the motor current is regenerated into a load LW via the high speed current reducing device or breaker L3. A large currency due to unsuccessful commutation by the chopper CH at the time of regeneration is reduced by the opening of the high speed current reducing device or breaker L3. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Toshiaki Awano

Bibliographic Details