Copying apparatus equipped with brushless DC motor

Details Copying apparatus equipped with brushless DC motor Copying apparatus equipped with brushless DC motor

1985-03-06

1987-01-13

Shoop, Jr., William M.

Electricity: motive power systems

Nonrunning, energized motor

318 40, 318254, 355 14R, H02K 2906

Patent

active

046366970

ABSTRACT:
A copying apparatus equipped with a brushless DC motor for driving a light source, a photoreceptor drum, etc. and including a motor locking circuit for locking the DC motor. The motor locking circuit, when an external force has been applied to a rotor of the DC motor while the DC motor is not being actuated, causes an electric current to flow through a stator coil of the DC motor such that the electric current produces a reaction force counteracting the external force.

REFERENCES:
patent: 3854080 (1974-12-01), Bambara et al.
patent: 4416536 (1983-11-01), Itoh et al.
patent: 4447768 (1984-05-01), Terui
patent: 4455515 (1984-06-01), Uzuka
patent: 4494051 (1985-01-01), Bailey

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