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:
May. 10, 1988
Filed:
Nov. 06, 1985
Thomas M Jahns, Schenectady, NY (US);
Vytautas Janonis, Cleveland, OH (US);
Gould Inc., Rolling Meadows, IL (US);
Abstract
An electric drive system uses a multiphase alternating current motor and inverter to convert power from a battery source to provide propulsion. The phase sets defined by the motor stator winding are excited by a corresponding plurality of inverters. Time harmonic currents in the windings are effectively suppressed by providing the drive motor in a configuration having high leakage inductance in the stator winding. The windings are arranged in sets of multiples of three-phase windings. In the illustrated embodiment, the inverters are arranged to define three-phase inverters for exciting m sets, where m.gtoreq.2, of three-phase windings of the motor stator. The number of multiphase winding sets is determined in a manner that eliminates the need for paralleling of inverter switching devices.