System for driving electric vehicles

A system for converting electric power of a battery and mechanical power of an engine into driving power of an output shaft at a prescribed rotating torque and rotational speed, said system comprising:

• a housing;
• a first rotor having a first control coil;
• a first stator fixed to said housing having a second control coil;
• a second rotor disposed between said first rotor and said first stator and having a first magnetic member for providing magnetic field interlinking said first control coil and a second magnetic member for providing magnetic field interlinking said second control coil;
• a first inverter, connected to said battery for controlling electric power to be supplied to said first control coil according to angular speed difference between said first and second rotors;
• a second inverter, connected between said second control coil and said battery, for controlling electric power to be supplied to said second control coil according to torque generated between said first stator and said first rotor;
• a second stator fixed to said housing and having a coil connected to said first inverter;
• and
• a third rotor carried by said first rotor and disposed to couple with said second stator, said third rotor having a coil connected to said first control coil for transmitting said electric power controlled by said first inverter from said coil of said second stator to said first control coil.

A system for driving a vehicle which converts electric power of a battery and mechanical power of an engine into driving power of an output shaft at a prescribed rotating torque and rotational speed, said system comprising:

• a housing;
• a first rotor having a permanent magnet for providing a magnetic field;
• a stator fixed to said housing and having a second control coil for providing a second rotating magnetic field;
• a second rotor disposed between said first rotor and said stator and having a first control coil interlinking said magnetic field of said first rotor and a permanent magnet for providing a magnetic field interlinking said second control coil, said second rotor disposed coaxially with said first rotor to rotatably support said first rotor;
• and
• means having slip rings fixed to said second rotor and brushes fixed to said housing for supplying electric power from said battery to said first coils;
• wherein said first rotor and said second rotor form a first electric synchronous machine, and
• said stator and said second rotor form a second electric synchronous machine.

A system for driving a vehicle which converts electric power of a battery and mechanical power of an engine into driving power of an output shaft at a prescribed rotating torque and rotational speed, said system comprising:

• a speed-torque converter having a housing, an input shaft disposed in said housing and connected to said engine, a first rotor having a first control coil, a stator fixed to said housing and having a second control coil disposed around said first rotor, a second rotor disposed between said stator and said first rotor and having a first permanent for generating magnetic field interlinking said first control coil and a second permanent magnet for generating magnetic field interlinking said second control coil, said output shaft disposed coaxially with said input shaft;
• first means for detecting rotational positions of said first rotor and said second rotor;
• second means, connected to said battery, said first control coil and said first means, for supplying said first control coil with electric current according to a difference in said rotational position between said first and second rotors;
• and
• third means, connected to said battery, said second control coils and said first means, for supplying said second control coils with electric current according to said rotation of second rotors.

A system for driving a vehicle which converts electric power of a battery and mechanical power of an engine into driving power of an output shaft at a prescribed rotating torque and rotational speed, said system comprising:

• a speed-torque converter having a housing, an input shaft disposed in said housing and connected to said engine, a first rotor having a first control coil, a stator fixed to said housing and having a second control coil disposed around said first rotor, a second rotor disposed between said stator and said first rotor and having a first ferro-magnetic member for generating a first magnetic field interlinking said first control coil and a second ferro-magnetic member for generating magnetic field interlinking said second control coil, said output shaft disposed coaxially with said input shaft;
• wherein
• said first and second ferro-magnetic members provide variable magnetic resistance to change inductances of said first and second control coils when they rotate;
• thereby forming a pair of electric reluctance motors in combination with said first control coil and said second control coil.