Circuit for preventing the erroneous operation of a motor contro

Details Circuit for preventing the erroneous operation of a motor contro Circuit for preventing the erroneous operation of a motor contro

1986-10-16

1988-05-24

Ro, Bentsu

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318266, 318469, H02P 122

Patent

active

047468459

ABSTRACT:
An automatic window regulator for automobiles includes a drive motor for lifting and lowering the window glass, and a detector for detecting when there is a foreign object jammed between the window glass as it is lifted or lowered and a window frame. The detector includes sensor means for measuring motor characteristic values of the drive motor and comparator means for comparing a first motor characteristic value measured by the sensor means with a second motor characteristic value measured by the sensor means a prescribed period of time prior to the first motor characteristic value and for generating a detected signal indicative of the jammed foreign object when any difference between the compared first and second motor characteristic values is greater than a predetermined range.

REFERENCES:
patent: 4220900 (1980-09-01), Mintz
patent: 4533901 (1985-08-01), Lederle
patent: 4561691 (1985-12-01), Kawai et al.
patent: 4563623 (1986-01-01), Matsuka
patent: 4628234 (1986-12-01), Mizuta et al.
patent: 4641067 (1987-02-01), Iizawa et al.

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