FLYWHEEL ENERGY STORAGE SYSTEM HAVING PERMANENT MAGNET TRANSMISSION

Provided in the present disclosure is a flywheel energy storage system having a permanent magnet transmission. The flywheel energy storage system comprises an electric motor, a flywheel rotor, a permanent magnet transmission and a generator. The electric motor is connected to the flywheel rotor to drive the flywheel rotor to rotate. The permanent magnet transmission comprises a permanent magnet rotor and a conductor rotor, which are coaxially arranged, wherein the permanent magnet rotor and the conductor rotor are opposite in an axial direction and form an air gap; and the flywheel rotor is drivingly connected to one of the permanent magnet rotor and the conductor rotor to drive same to rotate, so as to drive the other one of the permanent magnet rotor and the conductor rotor to rotate. The permanent magnet transmission further comprises a displacement device, which is used for adjusting the size of the air gap, such that the rotation speed of the other one of the permanent magnet rotor and the conductor roto