Motor driving apparatus and control method thereof

Details Motor driving apparatus and control method thereof Motor driving apparatus and control method thereof

2006-11-16

2008-10-07

Arani, Taghi T. (Department: 4193)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S801000, C318S809000, C318S811000

Reexamination Certificate

active

07432678

ABSTRACT:
A motor driving apparatus includes a speed control circuit for outputting a speed control signal on the basis of a target speed command and rotating speed information of a motor, a PWM signal generating circuit for generating and outputting a PWM signal on the basis of the speed control signal, a switching circuit for feeding power to motor windings on the basis of the PWM signal, and a protection circuit including a full torque detecting circuit for detecting a full torque status in which the speed control signal is a signal for instructing maximum torque. The protection circuit outputs a signal for stopping the switching circuit when the full torque detecting circuit detects a full torque status continuously for a specified time.

REFERENCES:
patent: 5327064 (1994-07-01), Arakawa et al.
patent: 5448154 (1995-09-01), Kanke et al.
patent: 6525506 (2003-02-01), Jin
patent: 05-122834 (1993-05-01), None

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