| 摘要 |
<p>An electric motor comprising: a ring-shaped stator having a plurality of windings, and a plurality of stator cores arranged between permanent magnets arranged with spaces therebetween in the circumferential direction; a ring-shaped outside rotor provided with a plurality of first salient pole parts, the outside rotor being arranged on the outside of the stator and having a line through the center of the stator as the rotational axis thereof; and a ring-shaped inside rotor provided with a number of second salient pole parts equal to the number of first salient pole parts, the inside rotor being arranged on the inside of the stator and connected coaxially with the outside rotor; wherein each of the permanent magnets extends in the radial direction of the stator and is magnetized in the circumferential direction of the stator, and both sides thereof in the radial direction are covered by the stator cores; each of the windings is wound in a concentrated winding on teeth formed by the permanent magnets and portions of each of two stator cores arranged on both sides in the circumferential direction of the respective permanent magnet; and the first salient pole parts and the second salient pole parts are arranged in positions offset from each other in the circumferential direction of the stator.</p> |
