Invention Grant
- Patent Title: Motor including permanent magnet rotor with flux barrier
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Application No.: US14692875Application Date: 2015-04-22
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Publication No.: US09893577B2Publication Date: 2018-02-13
- Inventor: Ryosuke Matsuda , Shinichi Noda
- Applicant: Nidec Corporation
- Applicant Address: JP Kyoto
- Assignee: NIDEC CORPORATION
- Current Assignee: NIDEC CORPORATION
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, LLP
- Priority: JP2014-127645 20140620
- Main IPC: H02K1/27
- IPC: H02K1/27 ; H02K21/12

Abstract:
A rotating portion of a motor includes magnets and a rotor core that holds the magnets in holding holes. Each of the magnets includes a first magnet element and two second magnet elements. The two second magnet elements are located on opposite circumferential sides of the first magnet element, and a coercivity of the two second magnet elements is smaller than the first magnet element. The rotor core includes a flux barrier including a void located on a radially inner side of the first magnet elements. A width of the magnets in a direction perpendicular or substantially perpendicular to a radial direction passing through a center of the corresponding first magnet element is larger than a width in the same direction of the corresponding flux barrier within a plane perpendicular or substantially perpendicular to the center axis.
Public/Granted literature
- US20150372578A1 MOTOR Public/Granted day:2015-12-24
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