Motor control device for vehicular power mirror

Details Motor control device for vehicular power mirror Motor control device for vehicular power mirror

2006-01-03

2006-01-03

Duda, Rina (Department: 2837)

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

C388S805000, C388S912000, C318S600000, C318S603000, C318S632000

Reexamination Certificate

active

06983102

ABSTRACT:
When a signal level of a motor brush switching signal is low and thus dropouts or omission of the pulse signals converted by a waveform shaping part take place, so that an interval between a pulse signal to be currently counted and an immediately preceding pulse signal thereof becomes longer than a predetermined average interval, a pulse signal counter makes a correction of the number of counts by adding one pulse to the pulse to be counted. Therefore, even if the signal level of the motor brush switching signals generated from a vertical motion motor M2is low for some reasons, accurate control can be exercised over the number of rotations of the vertical motion motor M2.

REFERENCES:
patent: 5315442 (1994-05-01), Sato et al.
patent: 5475302 (1995-12-01), Mehnert et al.
patent: 6023136 (2000-02-01), Pinewski
patent: 6621062 (2003-09-01), Tamagawa et al.
patent: 2001-138812 (2001-05-01), None

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