公开(公告)号：US4075541A

公开(公告)日：1978-02-21

申请号：US426650

申请日：1973-12-12

申请人： Takanori Shibata ,  Katsuji Marumoto

发明人： Takanori Shibata ,  Katsuji Marumoto

IPC分类号： B60L11/18 ,  B60L15/08 ,  H02P7/29 ,  H02P5/00

CPC分类号： B60L15/08 ,  H02P7/29 ,  Y02T10/645 ,  Y02T10/646 ,  Y02T10/648

摘要： A direct current motor control device for use in battery automobiles comprises a direct current motor to be driven by a plurality of battery groups each battery group delivering an equal voltage. The device comprises a battery change-over thyristor circuit inclusive of a chopper circuit and can control the voltage applied to the motor by means of the chopping operation of the chopping circuit and the series-parallel change-over operation for the battery groups. The series-parallel change-over operation of the battery groups is automatically effected in response to the signal for controlling the control signal of time ratio for the chopper circuit.