| 摘要 |
PROBLEM TO BE SOLVED: To obtain a low-cost DC series motor which can restrain elevation of the number of revolutions during low load operation. SOLUTION: The DC series motor includes a rotor, a yoke, a plurality of magnetic cores arranged side by side in the rotational direction of the rotor on the inside of the yoke, a field winding wound, respectively, around the plurality of magnetic cores, and an auxiliary permanent magnet which is arranged between two adjoining magnetic cores and magnetized in the rotational direction of the rotor. COPYRIGHT: (C)2010,JPO&INPIT
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