Variable resistance output motor controller

Details Variable resistance output motor controller Variable resistance output motor controller

1987-12-04

1988-07-05

Dobeck, Benjamin

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318334, 318480, H02P 300

Patent

active

047557303

ABSTRACT:
In a thermostatic control system a solid state motor controller is provided by reproducing a potentiometer tracking with a CPU producing appropriate complimentary square wave signals having the duty cycle thereof proportional to a sensed temperature. The square wave signals are fed to circuits which are disposed across two output resistors and the effective resistance of the two resistors are varied in response to the duty cycle.

REFERENCES:
patent: 4216421 (1980-08-01), Dupont
patent: 4221996 (1980-09-01), Kaisha
patent: 4225812 (1980-09-01), Kraus
patent: 4426604 (1984-01-01), Doeman et al.
patent: 4599548 (1986-07-01), Schultz
patent: 4722669 (1988-02-01), Kundert
Automatic Control Principles--Honeywell, Minneapolis, Minnesota, Form No. 71-97152, pp. 32-35.

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