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Power plant

  • US 8,564,146 B2
  • Filed: 07/23/2010
  • Issued: 10/22/2013
  • Est. Priority Date: 10/13/2009
  • Status: Active Grant
First Claim
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1. A power plant for driving driven parts, including:

  • a heat engine including an output portion for outputting motive power;

    a first rotating machine;

    a second rotating machine capable of converting supplied electric power to motive power and outputting the motive power from a rotor thereof, and also capable of converting motive power input to said rotor to electric power; and

    a controller for controlling operations of said heat engine and said first and second rotating machines,wherein said first rotating machine comprises a first rotor having a magnetic pole row that is formed by a predetermined plurality of magnetic poles arranged in a circumferential direction, and has each two magnetic poles thereof adjacent to each other so disposed as to have respective polarities different from each other, said first rotor being rotatable in the circumferential direction, an unmovable stator having an armature row that is disposed in a manner opposed to said magnetic pole row and is for generating a predetermined plurality of armature magnetic poles to thereby cause a rotating magnetic field rotating in the circumferential direction to be generated between said armature row and said magnetic pole row, and a second rotor having a soft magnetic material element row that is formed by a predetermined plurality of soft magnetic material elements arranged in the circumferential direction in a manner spaced from each other, and is disposed between said magnetic pole row and said armature row, said second rotor being rotatable in the circumferential direction,wherein a ratio between the number of the armature magnetic poles, the number of the magnetic poles, and the number of said soft magnetic material elements is set to 1;

    m;

    (1+m)/2 (m≠

    1.0),wherein one of said first and second rotors is mechanically connected to said output portion whereas the other of said first and second rotors is mechanically connected to the driven parts, and said rotor is mechanically connected to the driven parts, andwherein in starting said heat engine, when a rotational speed of said output portion is not lower than a first predetermined value, said heat engine is started by said controller in a state where the rotational speed of said output portion is not increased.

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