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Patent Searching and Data


Title:
IPM ROTATING ELECTRIC MACHINE
Document Type and Number:
WIPO Patent Application WO/2005/076440
Kind Code:
A1
Abstract:
A technique enabling permanent magnets constituting the field of an IPM rotating electric machine to be embedded in a rotor core in a shallower depth. The IPM rotating electric machine includes a stator and a rotor. The rotor has a rotor core and permanent magnets forming the field. The rotor core has a side face facing the stator, and the permanent magnets are shallowly embedded in the rotor core such that the distance between its magnetic pole face and the side face of the rotor is reduced. Furthermore, two adjacent permanent magnets are positively separated to satisfy the relation of 0.3<(Lq-Ld)/Ld, where Lq is the q-axis inductance and Ld is the d-axis inductance of the rotor.

Inventors:
Fujiwara, Kenji c/o Kobe Shipyard & Machinery Works Mitsubishi Heavy Industries Ltd. (1-1, Wadasaki-cho 1-chome, Hyogo-k, Kobe-shi Hyogo 54, 65208, JP)
Kogure, Takatoshi c/o Kobe Shipyard & Machinery Works Mitsubishi Heavy Industries Ltd. (1-1, Wadasaki-cho 1-chome, Hyogo-k, Kobe-shi Hyogo 54, 65208, JP)
Nishio, Akira c/o Kobe Shipyard & Machinery Works Mitsubishi Heavy Industries Ltd. (1-1, Wadasaki-cho 1-chome, Hyogo-k, Kobe-shi Hyogo 54, 65208, JP)
Baba, Tutomu c/o Seiryo Engineering Co. Ltd. (1-14, Wadamiyatoori 7-chome, Hyogo-k, Kobe-shi Hyogo 63, 65208, JP)
Application Number:
PCT/JP2005/001597
Publication Date:
August 18, 2005
Filing Date:
February 03, 2005
Export Citation:
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Assignee:
MITSUBISHI HEAVY INDUSTRIES, LTD. (16-5, Konan 2-Chome Minato-ku, Tokyo 15, 10882, JP)
Fujiwara, Kenji c/o Kobe Shipyard & Machinery Works Mitsubishi Heavy Industries Ltd. (1-1, Wadasaki-cho 1-chome, Hyogo-k, Kobe-shi Hyogo 54, 65208, JP)
Kogure, Takatoshi c/o Kobe Shipyard & Machinery Works Mitsubishi Heavy Industries Ltd. (1-1, Wadasaki-cho 1-chome, Hyogo-k, Kobe-shi Hyogo 54, 65208, JP)
Nishio, Akira c/o Kobe Shipyard & Machinery Works Mitsubishi Heavy Industries Ltd. (1-1, Wadasaki-cho 1-chome, Hyogo-k, Kobe-shi Hyogo 54, 65208, JP)
Baba, Tutomu c/o Seiryo Engineering Co. Ltd. (1-14, Wadamiyatoori 7-chome, Hyogo-k, Kobe-shi Hyogo 63, 65208, JP)
International Classes:
H02K1/14; H02K1/22; H02K1/27; H02K21/16; H02K29/00; (IPC1-7): H02K21/16; H02K1/14; H02K1/22; H02K29/00
Foreign References:
JP2002153033A2002-05-24
JP2000228890A2000-08-15
JP2003284274A2003-10-03
JP2003199273A2003-07-11
Other References:
See also references of EP 1713163A1
Attorney, Agent or Firm:
Kudoh, Minoru (6F Kadoya Bldg, 24-10 Minamiooi 6-chom, Shinagawa-ku Tokyo 13, 14000, JP)
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