Controller for an electric motor that operates on direct current

Details Controller for an electric motor that operates on direct current Controller for an electric motor that operates on direct current

1991-10-18

1993-08-24

Ro, Bentsu

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Starting and/or stopping

318 66, H02P 154

Patent

active

052392414

ABSTRACT:
This invention relates to a speed control circuit for an electric motor. It includes a controller having a plurality of input circuits and an output circuit adapted to be connected to one of a plurality of direct current motors. The controller includes means responsive to an alternating signal on a selected one of said input circuits for generating and maintaining a unidirectional motor-energizing voltage of predetermined magnitude in the output circuit whereby the speed of said one motor may be controlled. The controller further includes Hall cell devices coupled to a plurality of motors, respectively, for generating the alternating signal in response to energization of a selected motor.

REFERENCES:
patent: 4289997 (1981-09-01), Jung et al.
patent: 4641069 (1987-02-01), Fujioka et al.
patent: 4743811 (1988-05-01), Katayama
patent: 4776528 (1988-10-01), West
patent: 4988273 (1991-01-01), Faig et al.
patent: 5055750 (1991-10-01), Fukui et al.
patent: 5077506 (1991-12-01), Krause

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