Motor/generator with multiple rotors
AssigneeNissan Motor Co., Ltd.
InventorMasaki Nakano
Life of this patent
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Abstract
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.
Claims6
A motor/generator, comprising:
- 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.
A motor/generator, comprising:
- a first rotor comprising plural magnetic poles, the rotor being supported so as to be freely rotatable about an axis;
- a second rotor comprising plural magnetic poles, the second rotor being supported so as to be freely rotatable about the axis;
- a stationary stator which is co-axial with the first rotor;
- a coil unit which comprises plural coils disposed at equal angular intervals about the stator and which forms a plurality of first rotating magnetic fields equal in number to the number of magnetic poles of the first rotor in response to the supply of a first alternating current and a plurality of second rotating magnetic fields of equal number to the number of magnetic poles of the second rotor in response to the supply of a second alternating current, the coil unit generating first salient poles facing the first rotor and second salient poles facing the second rotor, wherein the ratio of the first salient poles and second salient poles is set equal to the ratio of a magnetic pole number of the first rotor and a magnetic pole number of the second rotor;
- and
- an electrical circuit for supplying a composite electrical current comprising the first alternating current and the second alternating current to the coil unit,
- wherein the number of the first salient poles is larger than the number of the second salient poles,
- wherein the second salient poles are divided by a large resistor provided in the stator, and
- wherein the first salient poles are divided by the resistor, and slits formed in the stator.
Dependencies are inferred from the claim text.