Motor drive control apparatus and method having motor...

Details Motor drive control apparatus and method having motor... Motor drive control apparatus and method having motor...

2006-08-01

2006-08-01

Duda, Rina (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S132000, C318S254100, C318S434000, C318S430000, C318S432000

Reexamination Certificate

active

07084594

ABSTRACT:
A direct current motor for an engine throttle control is driven with a motor current of 100% duty ratio, when a throttle valve is to be moved from one throttle position to another or when the movement of the throttle valve is to be braked. The motor current is limited to a limit level, when the motor locks, that is, when the motor current continues to be in excess of the limit level for more than a predetermined period. The motor may be driven with a limited current at initial stages of moving the throttle valve, and with a further limited current when the motor lock is detected. The motor current is finally shut off, when the throttle valve is not rotated to the target position after the continuation of the limitation of the motor current for more than a predetermined period.

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Office Action in JP 10-328249, Jun. 6, 2005.

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