Circuit and method for controlling speed of an alternating curre

Details Circuit and method for controlling speed of an alternating curre Circuit and method for controlling speed of an alternating curre

1976-08-18

1978-06-06

Rubinson, Gene Z.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318229, 318230, H02P 540

Patent

active

040938999

ABSTRACT:
A circuit for controlling the speed of an alternating current motor. The circuit has a gate controlled full wave alternating current switch coupled in series relation with the motor, and a phase control circuit coupled in parallel relation with the switch is operable generally for providing signals indicative of the occurrence of a preselected condition. Means is provided for transmitting the indicative signals to the gate of the switch to control the duration of the conduction thereof in either direction and thereby vary the energy delivered to the motor so as to control its speed in accordance with the occurrence of the preselected condition.
A method of controlling the speed of an alternating current motor is also disclosed.

REFERENCES:
patent: 3196629 (1965-07-01), Wood
patent: 3403314 (1968-09-01), Maynard
patent: 3415071 (1968-12-01), Kompelien
patent: 3613391 (1971-10-01), Harter

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