Title:
PERMANENT MAGNET MOTOR, PERMANENT MAGNET MOTOR MANUFACTURING METHOD, AND COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2019/073579
Kind Code:
A1
Abstract:
In this permanent magnet motor, the number S of slots formed on the stator and the number P of poles of the rotor satisfy the relationship of S > P. The rotor has a multistage skew structure in which rotor constituent bodies of respective stages arranged in the axial direction of a rotating shaft are disposed by being shifted in the circumferential direction. When θs is given by 360º/(the least common multiple of S and P) and θp_MAX is given by 360º/(2 x P), the skew angle θskew between the rotor constituent bodies at the highest and lowest stages satisfies the relationship of θs – (θp_MAX
–θs) <θskew ≤ θs + (θp_MAX
– θs). In addition, a method for manufacturing the permanent magnet motor forms a rivet insertion hole formed in a rotor core in an elongated hole shape along the circumferential direction about the rotational axis of the rotor and gives a skew to the rotor core after inserting a rivet into the rivet insertion hole.
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Inventors:
TAMURA YUKI (JP)
WATANABE TAKANORI (JP)
MASUMOTO KOJI (JP)
DOMOTO SHOJIRO (JP)
WATANABE TAKANORI (JP)
MASUMOTO KOJI (JP)
DOMOTO SHOJIRO (JP)
Application Number:
PCT/JP2017/037028
Publication Date:
April 18, 2019
Filing Date:
October 12, 2017
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02K21/14; H02K1/27; H02K15/03
Domestic Patent References:
WO2015104956A1 | 2015-07-16 |
Foreign References:
JP2010207090A | 2010-09-16 | |||
JP2002315285A | 2002-10-25 | |||
JP2005057942A | 2005-03-03 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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