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. 07, 1983
Filed:
Sep. 19, 1980
Robert V Zigler, Holland, MI (US);
General Electric Company, Fort Wayne, IN (US);
Abstract
A single phase alternating current induction type motor is operative at more than one voltage level using the same winding circuitry. The motor has a main winding comprising two serially connected sections similarly formed and physically disposed in slots of a slotted stator core to define a number of primary magnetic poles. A second phase winding, such as a start winding, displaced in phase from the main winding sections, is connected in series with one of the main winding sections and in parallel with the other of the main winding sections. A thermistor is permanently connected in series with the start winding, the thermistor increasing in temperature in response to current flow therethrough to a preselected point where the effectiveness of the second phase winding becomes substantially less than during starting conditions regardless of the operating voltage. In addition, the first phase winding is formed such that at all rated voltage levels of operation, a generally balanced MMF pattern is produced for the primary magnetic poles, both during start and run conditions. To enhance this balance, the two winding sections of the main winding may be bifilarly wound.