Title:
CAGE ROTOR AND METHOD OF MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/1990/006013
Kind Code:
A1
Abstract:
Slotted conductors (1e) and end rings (1d) of a cage rotor core (1) are formed by filling a rotor core shell with molten aluminum at a flow rate not more than 1.5 m/sec, and then solidifying the filled aluminum under a high pressure of not less than 400 kg/cm2, whereby the density of the aluminum is raised to 2.64-2.70 g/cm3. Thus the size and weight of the motor can be reduced greatly, and a cage rotor having improved torque characteristics, quality and reliability can be obtained.
Inventors:
YOSHIDA AKIO (JP)
KAWAGUCHI KENJI (JP)
OURA ENKICHI (JP)
OKADA TAKASHI (JP)
KAWAGUCHI KENJI (JP)
OURA ENKICHI (JP)
OKADA TAKASHI (JP)
Application Number:
PCT/JP1986/000341
Publication Date:
May 31, 1990
Filing Date:
July 03, 1986
Export Citation:
Assignee:
YOSHIDA AKIO (JP)
KAWAGUCHI KENJI (JP)
OURA ENKICHI (JP)
OKADA TAKASHI (JP)
KAWAGUCHI KENJI (JP)
OURA ENKICHI (JP)
OKADA TAKASHI (JP)
International Classes:
B22D19/00; H02K15/00; H02K17/16; (IPC1-7): B22D17/00; B22D19/00; H02K15/02; H02K17/16
Foreign References:
| JPS58207848A | 1983-12-03 | |||
| JPS59189055A | 1984-10-26 | |||
| JPS57151255A | 1982-09-18 |
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