Invention Grant
- Patent Title: Permanent magnet electric machine with moveable flux-shunting elements
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Application No.: US15860234Application Date: 2018-01-02
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Publication No.: US10541578B2Publication Date: 2020-01-21
- Inventor: Shawn H. Swales , Khwaja M. Rahman , Goro Tamai , Craig S. Ross
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn IP Law
- Main IPC: H02K1/28
- IPC: H02K1/28 ; H02K1/24 ; H02K1/27 ; H02K15/03

Abstract:
A permanent magnet electric machine (PM machine) for a vehicle or other system includes a rotor assembly, fixed permanent magnets, a stator, an actuator, and one or more repositionable/moveable flux-shunting elements. The flux-shunting element is repositioned to control flux at specific operating points of the PM machine. The rotor assembly has a rotor coaxially surrounding and coupled to a rotor shaft. The permanent magnets are mounted to or in the rotor, and the moveable flux-shunting element is positioned between the rotor shaft and a respective one of the permanent magnets. Inboard and outboard ends of each respective permanent magnet may be oriented toward the rotor shaft and stator, respectively. The actuator selectively positions the moveable flux-shunting element at one or more operating points of the PM machine to vary reluctance in a magnetic circuit formed by the stator and rotor assembly.
Public/Granted literature
- US20190207446A1 PERMANENT MAGNET ELECTRIC MACHINE WITH MOVEABLE FLUX-SHUNTING ELEMENTS Public/Granted day:2019-07-04
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