Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1991-04-26
1992-12-15
Ro, Bentsu
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
318266, 318286, 318466, H02P 122
Patent
active
051720370
ABSTRACT:
A dc motor switching circuit is disclosed, and the circuit includes: a forward revolution switching circuit section 1; a reverse revolution switching circuit section 2; a constant voltage section 3; a switching circuit section 4; an automatic circuit section 5; a manual circuit section 6; a resetting circuit section 7; and upper and lower limit detecting sections 8a, 8b. The dc motor switching circuit of the present invention can be applied to the power window switch of an automobile in a simple manner. Even in the case where upper and lower limits are set up as in a closing/opening device of a garage shutter, a universal application is possible. In all such cases, its constitution is simple, and the circuit is capable of preventing any undesirable result (such as degradation, burning and the like). Further, the automatic and manual operations can be carrier out in a convenient manner.
REFERENCES:
patent: 4279490 (1981-07-01), Mashimo et al.
patent: 4481452 (1984-11-01), Kitano et al.
patent: 4562387 (1985-12-01), Lehnhoff
patent: 4800324 (1989-01-01), Kuttner
patent: 4899063 (1990-02-01), Suck
patent: 4983896 (1991-01-01), Sugiyama et al.
Nawrocki Lawrence M.
Ro Bentsu
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