The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 1976
Filed:
Feb. 10, 1975
Dann W Denny, Morrison, IL (US);
General Electric Company, Fort Wayne, IN (US);
Abstract
A control circuit for varying the speed of a dynamoelectric machine having a plurality of windings selectively energizable in different configurations for operation of the dynamoelectric machine at different speeds from an alternating current source. The control circuit has a phase control circuit for providing signals having a controllable phase relation to the alternating current source. A gate controlled full wave alternating current switch is connected in parallel with one of the windings, and the parallel combination of the one winding and the switch is connected in series with at least another of the windings whereby the switch conducts generally the full alternating current source voltage applied to the other winding. Means couples the phase control circuit to the gate of the switch to control the start of the conduction of the switch. A control circuit in a refrigeration system and a method of controlling speed of a dynamoelectric machine are also disclosed.