Open/close body drive device

Details Open/close body drive device Open/close body drive device

2006-05-23

2009-10-27

Duda, Rina I (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

C318S280000, C318S466000, C318S459000, C049S026000, C049S028000

Reexamination Certificate

active

07609017

ABSTRACT:
The open/close body drive device is capable of restarting a brushless motor, without using magnetic pole sensors, so as to securely drive an open/close body in an arbitrary direction when any of the magnetic pole sensors has failed. When a CPU (1) detects an abnormal logic as a detection pattern of the magnetic pole sensors (9), the CPU (1) determines that the sensor has failed and temporarily stops drive of a DC brushless motor (5), and a motor drive unit (4) generates a phase switching signal to prolong one of electric connection patterns for performing sensorless drive when restarting the DC brushless motor (5).

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patent: 6082433 (2000-07-01), Vafaie et al.
patent: 6390520 (2002-05-01), Holzer
patent: 2004/0251868 (2004-12-01), Sato et al.
patent: 5-236791 (1993-09-01), None
patent: 2001-112282 (2001-04-01), None
patent: 2002-349137 (2002-12-01), None

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