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. 26, 2019
Filed:
Sep. 11, 2014
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Wisconsin Alumni Research Foundation, Madison, WI (US);
Kensuke Sasaki, Madison, WI (US);
Takashi Fukushige, Kanagawa, JP;
Takashi Kato, Kanagawa, JP;
Robert D. Lorenz, Madison, WI (US);
Apoorva Athavale, Madison, WI (US);
Nissan Motor Co., Ltd., Yokohama, JP;
Wisconsin Alumni Research Foundation, Madison, WI (US);
Abstract
A permanent magnet synchronous motor includes a stator with a stator winding, a rotor with a rotor core rotatable relative to the stator, and a magnetic structure with at least one permanent magnet mounted to the rotor core. The magnetic structure produces a magnetic flux that flows between different magnetic poles of the magnetic structure through a main magnetic flux path that passes through the stator winding of the stator via an air gap and a leakage magnetic flux path that is located within the rotor core about an end portion of the permanent magnet near the air gap. The stator, the rotor and the magnetic structure being further configured to satisfy predetermined relationships in regards to the magnetic resistance of the main magnetic flux path and the leakage magnetic flux path, the magnetomotive force of the magnets and the stator.