Electronic control device for a direct current electric motor ha

Details Electronic control device for a direct current electric motor ha Electronic control device for a direct current electric motor ha

1994-11-18

1996-04-30

Cabeca, John W.

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318285, 318257, H02P 140

Patent

active

055128076

ABSTRACT:
A drive motor for a motor vehicle screen wiping apparatus operates with repeated reversals of its direction of rotation, and is controlled by a control circuit which is connected to a transistor arranged in the power supply path for the motor, in series with it. The transistor is put into conduction at a time, and in a manner, such as to reduce the audible noise caused by the repeated reversals.

REFERENCES:
patent: 4412158 (1983-10-01), Jefferson et al.
patent: 4581565 (1986-04-01), Van Pelt et al.
patent: 4980838 (1990-12-01), Daggett et al.

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