Vehicle drive system

A vehicle drive system comprising:

• a motor that has a cylindrical stator and a cylindrical rotor rotatably provided in the stator to be coaxial with a center axis of the stator and that drives a drive wheel of a vehicle by rotation of the rotor,
• the stator having primary conductors that extend in an axial direction and are aligned in a circumferential direction,
• the rotor having:
• secondary conductors that extend in the axial direction and are aligned in the circumferential direction in a radially outer portion;
• and permanent magnets that extend in the axial direction and are aligned in the circumferential direction in a portion on a radially inner side of the secondary conductors,
• circuitry configured to generate a rotating magnetic field in the stator through a current supply to the primary conductor and set a drive mode of the motor to an asynchronous operation mode in which the rotor is rotated by using an induced current generated in the secondary conductor, wherein in the asynchronous operation mode, a number of poles of the stator is different from a number of poles of the permanent magnets, and
• the circuitry is configured to determine whether a surrounding travel environment of the vehicle satisfies a predetermined condition, and after it is determined that the predetermined condition is satisfied, intentionally switch the motor to the asynchronous operation mode to generate a controlled torque pulsation as a functional output.