Motor control apparatus

Details Motor control apparatus Motor control apparatus

2005-12-30

2010-02-23

Benson, Walter (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Hysteresis or reluctance motor systems

C318S721000, C318S724000, C318S568240

Reexamination Certificate

active

07667427

ABSTRACT:
Presence/absence of a failure in a feedback control system of a motor is monitored. When a failure is detected in the feedback control system, the motor is driven by switching to an open-loop control. During the open-loop control, the motor is rotated by sequentially switching the motor current supply phase without feeding back encoder count information. The position count is incremented or decremented every time the current supply phase is switched. When the position count has reached a target count, it is determined that the rotor has reached a target position, whereupon the open-loop control is finished.

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