公开(公告)号：US4074179A

公开(公告)日：1978-02-14

申请号：US587107

申请日：1975-06-16

申请人： Benjamin C. Kuo ,  John R. Frus ,  Gurdial Singh

发明人： Benjamin C. Kuo ,  John R. Frus ,  Gurdial Singh

IPC分类号： H02P8/12 ,  H02K37/00

CPC分类号： H02P8/12

摘要： Apparatus and controls for indicating the position of a stepping motor rotor as it successively steps and without the need for physically driven encoders or pulse generators, characterized by arrangements for sensing the current, or the rate of change of current, flowing in the motor windings. The intelligence indicating when the rotor reaches successive positions is applied advantageously to a utilization device such as a counter to signal the position of a driven load, and is used to control sequenced energization of the motor windings to create the advantages of a closed loop system but without a driven feedback device.