Vehicle transmission system with variable speed drive

A transmission system comprising:

• a first permanent-magnet motor-generator comprising a first rotor and a first stator, said first rotor containing permanent magnets and said first stator containing electrical windings, said first stator having an outer diameter larger than its width, and said first rotor being operably connected to input of transmission;
• a second permanent-magnet motor-generator comprising a second rotor and a second stator, said second rotor containing permanent magnets and said second stator containing electrical windings, said second stator having an outer diameter larger than its width;
• torque transmitting means consisting of at least one planetary gear mechanism having at least three rotating elements, one element of which is operably connected to first motor-generator, a second element of which is operably connected to second motor-generator;
• a multispeed gearbox which is operably connected to a third element of the planetary gear mechanism;
• a housing surrounding the stators of the motor-generators which contains an integrated cooling passage;
• and
• means for sensing movement of at least one of the rotating elements in the differential gear mechanism.

A transmission system comprising:

• a first permanent-magnet motor-generator comprising a first rotor and a first stator, said first rotor containing permanent magnets and said first stator containing electrical windings, said first stator having an outer diameter larger than its width, said first rotor being operably connected to and coaxial with input shaft of transmission;
• a second permanent-magnet motor-generator comprising a second rotor and a second stator, said second rotor containing permanent magnets and said second stator containing electrical windings, said second stator having an outer diameter larger than its width, said second rotor being coaxial with input shaft of transmission;
• torque transmitting means consisting of at least one planetary gear mechanism having at least three rotating elements, one element of which is operably connected to first motor-generator, a second element of which is operably connected to second motor-generator;
• a multispeed gearbox which is operably connected to a third element of the planetary gear mechanism;
• a housing surrounding the stators of the motor-generators which contains an integrated cooling passage;
• means for sensing movement of at least one of the rotating elements in the differential gear mechanism;
• and
• a power transducer for controlling the flow of power through motor-generators.