VEHICLE DRIVE SYSTEM
DRIVE
December 31, 2025
[Task] To provide a vehicle drive system that includes a motor capable of suppressing demagnetization of a permanent magnet section.[Solution] A vehicle drive system 5 includes a motor 2 that has a cylindrical stator 17 and a cylindrical rotor 19 provided in the stator 17 to be coaxially rotatable with a center axis of the stator 17 and drives a front wheel FW of a vehicle 1 by rotation of the rotor 19. The rotor 19 has a cage section 31 and a permanent magnet section 28 provided on an inner circumferential side of the cage section 31 and formed of a rare earth magnet. The vehicle drive system 5 further includes a controller 13 that executes a synchronous operation mode when a temperature of the permanent magnet section 28 is lower than a predetermined temperature, and executes an asynchronous operation mode when the temperature of the permanent magnet section 28 is equal to or higher than the predetermined temperature. In the synchronous operation mode, the rotor 19 is rotated by using a magnetic force of the permanent magnet section 28. In the asynchronous operation mode, the rotor 19 is rotated by using an induced current generated in the cage section 31.
Discussion in the ATmosphere