Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
ELECTRIC MOTOR AND ELECTRIC COMPRESSOR USING SAME
Document Type and Number:
WIPO Patent Application WO/2012/141085
Kind Code:
A1
Abstract:
Provided is an electric motor configured in such a manner that the size of magnets is reduced to reduce cost and the density of magnetic flux is adjusted to effectively utilize magnet torque and reluctance torque. As a result of the configuration, the efficiency of the electric motor is increased, and the electric motor is compact and has reduced cost. An electric motor is provided with a rotor (12) comprising: a cylindrical rotor core (40) in which main magnetic poles (41) and auxiliary magnet poles (42) are alternately arranged in the circumferential direction; substantially V-shaped magnet insertion holes (43) each provided so as to correspond to each of the main magnetic poles (41) in such a manner that the center of the magnet insertion hole (43) is on a d-axis passing through the center (O) of the rotor and through the center of the main magnetic pole (41) in the circumferential direction and that the protrusion of the magnet insertion hole (43) faces the center (O) of the rotor; and magnets (46), each two of which being provided to each pole so as to be embedded in a substantially V-shape in each of the magnet insertion holes (43). The protrusion of each of the magnet insertion hole (43) is provided with a magnetism shielding space (45) which shields the gap between poles of the adjacent magnets (46). Each of the magnetism shielding spaces (45) has a predetermined width in the circumferential direction and is formed so as to protrude to both the outer and inner sides in the radial direction relative to the magnet insertion hole (43).

Inventors:
HATTORI MAKOTO (JP)
ISOBE SHINICHI (JP)
Application Number:
PCT/JP2012/059468
Publication Date:
October 18, 2012
Filing Date:
April 06, 2012
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
HATTORI MAKOTO (JP)
ISOBE SHINICHI (JP)
International Classes:
H02K1/27
Foreign References:
JP2005086955A2005-03-31
JP2005110485A2005-04-21
JPH11341719A1999-12-10
JP2004135375A2004-04-30
JP2000050546A2000-02-18
JP2007274798A2007-10-18
JP2003116235A2003-04-18
JP2007252018A2007-09-27
JP3913205B22007-05-09
JP2010098830A2010-04-30
Other References:
See also references of EP 2698900A4
Attorney, Agent or Firm:
FUJITA, Takaharu et al. (JP)
Takaharu Fujita (JP)
Download PDF:
Claims: