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Title:
PERMANENT MAGNET SYNCHRONOUS MACHINE
Document Type and Number:
Japanese Patent JP2014131373
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To make it possible to improve torque and efficiency in a permanent magnet synchronous machine to which a ferrite magnet is applied and a drive system using the machine.SOLUTION: A permanent magnet synchronous machine is a permanent magnet type motor comprising: a rotor having ferrite magnets arranged so as to configure a plurality of poles inside; and a stator arranged so as to have a predetermined gap between the stator and the rotator. The permanent magnet synchronous machine is configured so that a gap facing surface of each pole of the rotator has a shape having a salient to the side of the gap, a circumferential width of the salient is θp, and a part of the gap between the stator and the rotator in the θp is smaller than a part of the gap outside the θp; and is configured so that the electrical angle θp has relation of 80°<θp<135°.

Inventors:
TAKAHASHI AKIFUMI
MARUYAMA ERI
Application Number:
JP2012286611A
Publication Date:
July 10, 2014
Filing Date:
December 28, 2012
Export Citation:
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Assignee:
HITACHI APPLIANCES INC
International Classes:
H02K1/27
Domestic Patent References:
JPH05236688A1993-09-10
JP2007074898A2007-03-22
JP2012135100A2012-07-12
JPH11146584A1999-05-28
JP2008072854A2008-03-27
JP2006006067A2006-01-05
JP2012016189A2012-01-19
JP4666726B22011-04-06
JP2005354798A2005-12-22
Attorney, Agent or Firm:
Manabu Inoue
Yuji Toda
Shigemi Iwasaki