| 摘要 |
PURPOSE:To improve the heat sink property of a heat generator due to heat conduction by interposing main or auxiliary coil of different pole numbers which does not generate heat at the heating time in the intermediate between a main coil and an auxiliary coil of the same pole number. CONSTITUTION:When operating with the first pole number, the first main coil A and the first auxiliary coil B generate heat, and the second main coil C of the second pole number which does not generate heat is interposed in the intermediate between the coils A and B. Accordingly, since the heats from the first coils A and B of the heat generators are transmitted to the second main coil C in the intermediate, the heat sink from the heat generators can be improved. Then, when operating with 4 poles of the second pole number, the second main coil C and the second auxiliary coil D generate heat, but since the coil B is disposed in the intermediate between the coils C and D, the heat sink effect can be improved in the same manner as above. |
