Abnormality detection circuit for a motor for use in a copier

Details Abnormality detection circuit for a motor for use in a copier Abnormality detection circuit for a motor for use in a copier

1993-10-18

1995-05-02

Shoop, Jr., William M.

Electricity: motive power systems

Limitation of motor load, current, torque or force

318798, 318799, 318805, H02K 1732

Patent

active

054122953

ABSTRACT:
An electric circuit provided with an abnormal condition detector for a motor, for use in a toner image forming apparatus, includes a current detection circuit for detecting a presence of a current when a power supply circuit is switched OFF; a test circuit for confirming a line connection between a control circuit and a switch by transmitting a test signal between the control circuit and the switch and a control circuit for determining an abnormal section causing an abnormal condition of a motor.

REFERENCES:
patent: 4641067 (1987-02-01), Iizawa et al.
patent: 5225751 (1993-07-01), Kusano et al.
patent: 5241255 (1993-08-01), Oshima et al.
patent: 5303156 (1994-04-01), Matsuoka et al.

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