Motor control circuit

Details Motor control circuit Motor control circuit

1988-09-12

1991-02-05

Shoop, Jr., William M.

Electricity: motor control systems

Open loop speed control system for dc motor with commutator

Analog armature control

388832, 388915, 318806, H02P 762

Patent

active

049900021

ABSTRACT:
A control circuit for maintaining power output of a motor, irrespective of amplitude changes in line voltage. The output of an amplifier is indicative of the line voltage. A ramp generator generates a ramp voltage which is consistent and repetitive, irrespective of changes in the line voltage. A comparison is made between the ramp voltage and the amplifier output, causing a triac to fire when the two are equal. The equalization point is a point at which sufficient power can be derived from the remainder of the line voltage to assure consistent and repetitive operation.

REFERENCES:
patent: 3891902 (1975-06-01), Konrad
patent: 4152758 (1977-09-01), Bailey et al.
patent: 4191914 (1980-03-01), Lecluse
patent: 4298834 (1981-11-01), Opfer
patent: 4410842 (1983-10-01), Owen
patent: 4439718 (1984-03-01), Nola
patent: 4445078 (1984-04-01), Lange
patent: 4568193 (1986-02-01), Contri et al.
patent: 4677353 (1987-06-01), Shieh

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