Title:
INTERIOR PERMANENT MAGNET MOTOR AND ROTOR THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/176802
Kind Code:
A1
Abstract:
Provided is a rotor for an interior permanent magnet motor capable of improving performance by increasing interlinkage magnetic flux. The present invention provides a rotor for an interior permanent magnet motor in which permanent magnets (3) are enclosed in slots (12) of a rotor core (1) made of a magnetic material. The rotor core has a non-magnetic region (110) on the outside of frame edge in at least one of the one or more slots. This non-magnetic region is unevenly distributed on the far side from a magnetic pole center (Pc) with reference to a frame edge center (Ps) of the slot. The non-magnetic region may be provided in a bridge located on the outer peripheral side of the slot or in a rib between adjacent slots. The non-magnetic region is formed, for example, by non-magnetically modifying a part of an electromagnetic steel sheet. At least part of the non-magnetic region may consist of a narrowed portion in which the radial width of the bridge or spacing between adjacent ribs is smaller than in the surroundings thereof.
Inventors:
HAMADA NORIHIKO (JP)
ITO KAZUNORI (JP)
ITO KAZUNORI (JP)
Application Number:
PCT/JP2023/009745
Publication Date:
September 21, 2023
Filing Date:
March 14, 2023
Export Citation:
Assignee:
AICHI STEEL CORP (JP)
International Classes:
H02K1/276
Domestic Patent References:
| WO2016021651A1 | 2016-02-11 |
Foreign References:
| JP2000270503A | 2000-09-29 | |||
| JP2014093802A | 2014-05-19 | |||
| JP2013143791A | 2013-07-22 | |||
| JPH08331784A | 1996-12-13 |
Attorney, Agent or Firm:
MORIOKA Masayuki et al. (JP)
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