Jamming protection device for moving member

Details Jamming protection device for moving member Jamming protection device for moving member

2005-03-15

2005-03-15

Ip, Paul (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S280000, C318S283000, C318S469000

Reexamination Certificate

active

06867563

ABSTRACT:
When abnormal current due to jamming is detected through motor current (ID), the motor current (ID) performs an operation in which an ON/OFF operation and a continuous ON operation are repeated, so that increment of the motor current (ID) is restrained. At this time, determination of jamming is performed based on the ON/OFF operation and the continuous ON operation. When the jamming is determined, the motor current (ID) is stopped, and the motor is reversed.

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