| 摘要 |
PROBLEM TO BE SOLVED: To provide a drive unit which has a dust-proof function and a cooling function. SOLUTION: In the drive unit, coils 24, 25 are wound, and a magnetic pole 11 which causes to flow a magnetic flux in one of opposite directions of magnetic pole pieces 11b, 11c facing in a first direction and a magnetic pole 12 which causes to flow a magnetic flux in the other of opposite directions of magnetic pole pieces 12b, 12c facing in a first direction are alternately disposed. The drive unit includes a primary side 10 wherein a void 18 penetrating in a disposing direction of the magnetic pole is formed by space between the opposing magnetic pole pieces of each magnetic pole, a secondary side 30 that has magnetism and is disposed in the void 18, and a means to feed a gaseous medium to the void 18. COPYRIGHT: (C)2003,JPO
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