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:
Nov. 09, 1976
Filed:
Dec. 12, 1974
Applicant:
Inventors:
Leonhard Katz, Winchester, MA (US);
Lawrence A Ormord, West Lynn, MA (US);
Assignee:
Astro Dynamics, Inc., Burlington, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318227 ; 318231 ; 321 60 ; 321 61 ; 321 / ;
Abstract
This disclosure deals with a motor technique for enabling the running at speeds higher than 3600 r.p.m., for 60 c.p.s. excitation, without the previously required commutators, brushes, gear boxes or frequency changers, through novel sequence switching of different selected portions of three-phase power, controlled to cause multiple magnetic pole energization at different times from different power phases in order to produce successive phase-displaced resultant waveforms that are substantially sinusoidal but of a multiple of 60 c.p.s.