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:
Sep. 30, 1997
Filed:
Aug. 16, 1994
William Harry Kemp, Fallbrook, CA;
Victor Joseph Shideler, Carleton, CA;
ITT Corporation, New York, NY (US);
Abstract
A power supply for a variable speed AC motor includes a waveform generator for generating a periodic pulsed waveform according to a desired motor speed, an adjustable source of DC potential, and an inverter coupled to the waveform generator and to the source of DC potential. The inverter provides an AC pulse train to the AC motor, the pulse train having waveform characteristics according to the pulsed waveform generated by the waveform generator to obtain the desired speed. The voltage amplitude of the pulse train provided to the motor is proportional to the DC potential whereby motor currents can be controlled at the desired motor speed by varying the DC potential.