| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for reducing aerodynamic noise of a main motor, by reducing wind noise at each part of a plurality of cooling ducts provided in a rotor by improving the shape of each part of the plurality of cooling ducts provided in the rotor. SOLUTION: The method for reducing aerodynamic noise inside a main motor is configured, such that each inclined surface 8 as a face for reducing wind noise is formed, by chamfering each rotor core presser 3A, and each inclined surface is formed at each inlet part 6 of a plurality of cooling ducts provided in each rotor core 3. COPYRIGHT: (C)2010,JPO&INPIT
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