High-integration flywheel energy storage device with novel horizontal self-vacuum chamber

Abstract

The invention discloses a high-integration flywheel energy storage device with a novel horizontal self-vacuum chamber. A vacuum chamber is formed through a casing, an upper end of the vacuum chamber is a three-degree-of-freedom magnetic bearing fixedly connected with the casing by a bracket, which includes a radial magnetic bearing, an axial magnetic bearing and a permanent magnet, a lower end ofthe three-degree-of-freedom magnetic bearing is a flywheel rotor, a single-winding outer rotor bearingless motor is located at a lower end of the flywheel rotor, a rotor of the motor is mounted in anannular groove at a lower surface of the flywheel rotor, and a stator is fixed to a lower end of the casing by a bracket. The device is advantaged in that five-degree-of-freedom balance of the flywheel rotor is realized by the three-degree-of-freedom magnetic bearing combined with the single-winding outer rotor bearingless motor, a control mode is simplified, the integration degree is improved, ahorizontal composite vacuum pump is arranged at an upper end of the casing, a vacuum pump is a double-rotor structure which is mirror-symmetrical to the left and right, and the vacuum degree and the pumping speed are improved.

Description

technical field [0001] The invention relates to the technical field of flywheel energy storage, and specifically refers to a flywheel energy storage device in which a three-degree-of-freedom magnetic bearing cooperates with a single-winding outer rotor bearingless motor to achieve five-degree-of-freedom balance, and adopts a horizontal vacuum pump to self-evacuate. Background technique [0002] With the rapid development of the global economy, the consumption of natural resources is increasing day by day. Human beings are facing the major problems of depletion of natural resources and environmental pollution. Utilize existing energy efficiently and actively develop advanced energy storage technologies. The traditional chemical storage battery has high energy storage density and low price, and is widely used, but it needs regular maintenance, short life, large energy loss, long charging time, and brings pollution to the environment. Because the flywheel energy storage system...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of traditional flywheel energy storage devices such as low integration, complicated control and low energy storage density, and propose a flywheel energy storage device with a three-degree-of-freedom magnetic bearing and a single-winding outer rotor bearingless motor. The structure and control method of the flywheel energy storage device are simplified, while the integration and energy storage density of the flywheel energy storage system are improved, and the cost and loss are reduced

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