Protection circuit for a power window apparatus

Details Protection circuit for a power window apparatus Protection circuit for a power window apparatus

1988-06-09

1990-02-13

Shoop, Jr., William M.

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318286, 318266, H02P 122

Patent

active

049009940

ABSTRACT:
An automatic window glass elevating apparatus for moving a motor normally or reversely by drive control by a switch actuation to move a window glass in a closing or opening direction which has a resistor connected in series with the motor, first detector for detecting the locking time point of the motor from a point for crossing a first waveform signal representing a variation in a potential generated across the resistor by the driving current of the motor and a second waveform signal delayed from the first waveform signal for a first time and added with a first level thereto by obtaining the first waveform signal and the second waveform signal, and second detector for detecting a point for crossing a third waveform signal delayed for a second time from the first waveform signal and subtracted by a second level thereform and the first waveform signal by obtaining the third waveform signal to enable an automatic operation. Thus, the apparatus can operate an automatic circuit when the motor current decreases in a motor starting range.

REFERENCES:
patent: 4328451 (1982-05-01), Barge
patent: 4347465 (1982-08-01), Goertler et al.
patent: 4481450 (1984-11-01), Watanabe et al.
patent: 4628234 (1986-12-01), Mizuta et al.
patent: 4641067 (1987-02-01), Iizawa et al.
patent: 4712053 (1987-12-01), Numata
patent: 4746845 (1988-05-01), Mizuta et al.

Affiliated with

Also associated with

Rating

Protection circuit for a power window apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Protection circuit for a power window apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protection circuit for a power window apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1170523