Low-loss and high-speed integrated flywheel energy storage motor

Abstract

The present invention discloses a low-loss and high-speed integrated flywheel energy storage motor. The motor comprises a flywheel outer rotor, an excitation permanent magnet, an inner rotor, a motor bearing and a hollow core stator. The flywheel outer rotor is configured to store energy when rotation, the excitation permanent magnet is pasted at the surface of the inner side of the flywheel outer rotor to supply an excitation field for a motor; the hollow core stator is arranged between the inner rotor and the flywheel outer rotor, the air-gap winding in the hollow core stator is arranged along the direction of a rotation shaft, the motor bearing comprises a magnetic suspension bearing and a spiral groove bearing, the bottom of the inner rotor is connected with the rotation portion of the spiral groove bearing, and the upper portion of the boss of the inner rotor is connected with the rotation portion of the magnetic suspension bearing. The low-loss and high-speed integrated flywheel energy storage motor employs a mode of combination of an outer rotor structure, the excitation permanent magnet, the air-gap winding, the passive magnetic suspension bearing and the spiral groove bearing to allow the motor to reach low loss while high-speed operation and zero load energy storage maintenance.

Description

technical field [0001] The invention belongs to the field of flywheel energy storage motors, and more specifically relates to a low-loss high-speed integrated flywheel energy storage motor. Background technique [0002] Flywheel energy storage motor is a power source that converts electrical energy and rotor rotational mechanical energy to achieve the purpose of charging and discharging. Flywheel energy storage requires the motor to have a high speed, usually tens of thousands of revolutions per minute, and at the same time maintain the energy storage process without load. The loss is small. In order to meet the above requirements, the flywheel energy storage motor often adopts the structure of induction motor, reluctance motor or permanent magnet synchronous motor. Induction motors and reluctance motors require magnetic materials such as silicon steel sheets, which have low strength, which limits the size and speed of the motor, and limits the power density. At the same ti...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a low-loss high-speed integrated flywheel energy storage motor, thereby solving the technical problems of the prior art with large loss and limited motor speed

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