Modular drive brushless dc motor

A modular drive brushless DC motor comprising:

• a plurality of stators mechanically coupled to each other, each of plurality of stators having stator windings wound on an inner surface of said each of the plurality of stators;
• a plurality of rotors mounted on a rotor shaft, each of the plurality rotors has a plurality of permanent magnets disposed on the outer surface of said each of the plurality of rotors facing the respective stator windings of said each of the plurality of stators;
• a plurality of slave control and commutation units for commutating the plurality of stators and for controlling amount of current and voltage supplied to the plurality of stators;
• and
• a master control unit operatively coupled to the plurality of slave control and commutation units for individually actuating the plurality of slave control and commutation units to cause generation of desired torque and speed at the output of the rotor shaft.

A traction drive system for an electric/hybrid vehicle, comprising:

• a plurality of modular motors operable to drive a vehicle, wherein each of the plurality of modular motors comprises:
• one or more stators mechanically coupled to each other, each of one or more stators having stator windings wound on an inner surface of said each of the one or more stators;
• and
• one or more rotors mounted on a rotor shaft, each of the one or more rotors has a plurality of permanent magnets disposed on the outer surface of said each of the one or more rotors facing the respective stator windings of said each of the one or more stators;
• a plurality of slave control and commutation units for commutating the plurality of modular motors and for controlling amount of current and voltage supplied to the plurality of modular motors;
• and
• a master control unit operatively coupled to the plurality of slave control and commutation units for individually actuating the plurality of slave control and commutation units to cause generation of desired torque and speed at the output of the plurality of modular motors.