초록 ▼

Two rotors (3,4) and one stator (2) are arranged coaxially. A common coil unit (6) for individually driving two rotors (3, 4) is provided in a stator (2), and a composite current of an alternating current for driving the first rotor (3) and an alternating current for driving the second rotor (4) is

Two rotors (3,4) and one stator (2) are arranged coaxially. A common coil unit (6) for individually driving two rotors (3, 4) is provided in a stator (2), and a composite current of an alternating current for driving the first rotor (3) and an alternating current for driving the second rotor (4) is supplied to coil units (6). First salient poles (7B, 7C, 21C, 21D, 21E) facing the first rotor (3), and second salient poles (7D, 21F) facing the second rotor (4), are provided. By setting the number of these salient poles equal to the magnetic pole number ratio of the first rotor (3) and second rotor (4), the number of salient poles is reduced.

대표청구항 ▼

[What is claimed is:] [1.]a first rotor comprising plural magnetic poles and supported free to rotate;a second rotor comprising plural magnetic poles less than the magnetic poles of the first rotor and supported free to rotate relative to the first rotor;a stator having cores having plural first sal

[What is claimed is:] [1.]a first rotor comprising plural magnetic poles and supported free to rotate;a second rotor comprising plural magnetic poles less than the magnetic poles of the first rotor and supported free to rotate relative to the first rotor;a stator having cores having plural first salient poles facing the first rotor and plural second salient poles facing the second rotor, and coils wound onto the first salient poles, the ratio of the first salient poles and the second salient poles being equal to the ratio of the magnetic poles of the first rotor and the magnetic poles of the second rotor; and an electrical circuit for supplying a composite electrical current to the coils, the composite current comprising a first alternating current which produces a first rotating magnetic field which synchronously drives the first rotor and a second alternating current which produces a second rotating magnetic field which synchronously drives the second rotor.