Motor drive device

Details Motor drive device Motor drive device

2011-03-01

2011-03-01

Benson, Walter (Department: 2837)

Electricity: motive power systems

Motor-reversing

C318S265000, C318S266000, C318S282000, C318S434000

Reexamination Certificate

active

07898195

ABSTRACT:
The present invention presents a motor drive device capable of detecting jamming accurately without falsely detecting jamming when a movable part contacts with other members. Jamming by a backrest is detected by judging whether the value of a period of one pulse P1and a period of the next pulse P2(P2/P1) integrated for 150 times (integrated value: 150) exceeds a specified threshold (160) or not. Accordingly, if the backrest rubs against a backrest of an adjacent seat, and the motor speed suddenly drops for a short period, such “warp” is not falsely detected as jamming, and only actual jamming can be detected securely.

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