Invention Grant
- Patent Title: End ring and rotor bar for line start permanent magnet motor
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Application No.: US16106728Application Date: 2018-08-21
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Publication No.: US10651764B2Publication Date: 2020-05-12
- Inventor: Robert F. McElveen , Richard J. Budzynski
- Applicant: Baldor Electric Company
- Applicant Address: US AR Fort Smith
- Assignee: Baldor Electric Company
- Current Assignee: Baldor Electric Company
- Current Assignee Address: US AR Fort Smith
- Agency: Leydig, Voit & Mayer, Ltd.
- Main IPC: H02P1/50
- IPC: H02P1/50 ; H02K17/16 ; H02K21/46 ; H02P1/16 ; H02K1/27

Abstract:
A rotor for an LSIPM comprises a plurality of permanent magnets defining a number of poles (“P”) of the LSIPM, and a plurality of rotor bars spaced about the rotor defining a rotor bar area (“BA”). The rotor bars are formed of a conductive material having an associated conductivity (“σRB”). End members are disposed on axial opposite ends of the rotor core. The end members are in electrical contact with the rotor bars. The end members are formed from a material having an associated conductivity (“σEM”). Each end ring member has a minimum geometric cross sectional area (“ERA”) and outer diameter that generally corresponds to the rotor core outer diameter. The ERA is greater than 0.5 times the rotor bar area per the number of poles (BA/P) times a ratio of the rotor bar material conductivity to the end member material conductivity (σRB/σEM).
Public/Granted literature
- US20190058421A1 Eng Ring and Rotor Bar for Line Start Permanent Magnet Motor Public/Granted day:2019-02-21
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