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Power output apparatus and method of controlling the same

  • US 5,903,113 A
  • Filed: 04/26/1996
  • Issued: 05/11/1999
  • Est. Priority Date: 05/19/1995
  • Status: Expired due to Term
First Claim
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1. A power output apparatus comprising:

  • an output shaft for receiving power from an engine and for being rotated by said engine in a first direction;

    a drive shaft, for transmitting power to a load;

    a first motor comprising a first rotor connected with said output shaft and a second rotor connected with said drive shaft, said second rotor being coaxial to and rotatable relative to said first rotor, said first and second rotors being electromagnetically coupled with each other to transmit power between said output shaft and said drive shaft via the electromagnetic coupling of said first and second rotors;

    a first motor-driving circuit that exchanges electric currents with said first motor to vary the electromagnetic coupling of said first rotor with said second rotor;

    a second motor comprising a stator and a third rotor connected with said drive shaft, said stator being electromagnetically coupled with said third rotor;

    a second motor-driving circuit that exchanges electric currents with said second motor to vary the electromagnetic coupling of said stator with said third rotor;

    a storage device that stores electric power; and

    a controller that sends signals to said first motor-driving circuit and said second motor-driving circuit to control said first motor-driving circuit to enable said first motor to regenerate electric power, and to control said second motor-driving circuit to supply the regenerated electric power and the electric power stored in said storage device to said second motor to drive said second motor to make said drive shaft rotate in a second direction, which is opposite to said first direction.

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