| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor core structure that improves cooling efficiency and is reduced in diameter by embedding a cooling duct for air cooling into the outer circumferential edge of an annular core. SOLUTION: The motor core structure includes an annular core (1) having a protruding magnetic pole (2), a cooling duct (10) for air cooling which is embedded into the outer circumference (11) of the annular core (1), and a cylindrical case (6) provided on the outer circumference of the annular core (1). The annular core (1) is cooled with a cooling air circulating through the cooling duct (10) for air cooling. COPYRIGHT: (C)2009,JPO&INPIT
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