Title:
ROTOR STRUCTURE FOR ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2012/056921
Kind Code:
A1
Abstract:
A rotor structure for a rotary machine in which a rotor (10) is securely fastened to the outer periphery of a shaft (20) and a positioning key is formed on the inner wall of the rotor (10), while a key groove (21) that mates with positioning key (11) is formed on the outer periphery of the shaft (20), wherein curved sections (R) are formed on the side surfaces on both sides of the positioning key (11), thereby reducing stress at the angled sections of the rotor core to a greater extent than positioning keys of the prior art. At the same time, torque can be transmitted over the entire surface of an interference section of the shaft (20) thereby enabling torque to be reliably transmitted, and a magnetic path of a magnetic protrusion (d axis) to be ensured. A motor can thus be reduced in size.
Inventors:
NAITO YOSHIHARU (JP)
NAGATA KOJI (JP)
NAGATA KOJI (JP)
Application Number:
PCT/JP2011/073790
Publication Date:
May 03, 2012
Filing Date:
October 17, 2011
Export Citation:
Assignee:
MEIDENSHA ELECTRIC MFG CO LTD (JP)
NAITO YOSHIHARU (JP)
NAGATA KOJI (JP)
NAITO YOSHIHARU (JP)
NAGATA KOJI (JP)
International Classes:
H02K1/27; H02K1/28
Domestic Patent References:
| WO2008093622A1 | 2008-08-07 |
Foreign References:
| JPH07269478A | 1995-10-17 | |||
| JP2004032943A | 2004-01-29 | |||
| JP2008187804A | 2008-08-14 | |||
| JP2008312321A | 2008-12-25 |
Other References:
See also references of EP 2634893A4
Attorney, Agent or Firm:
MITSUISHI Toshiro et al. (JP)
Toshiro Mitsuishi (JP)
Toshiro Mitsuishi (JP)
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Claims: