Flywheel energy storing device

Abstract

The invention discloses a flywheel energy storing device. The device includes a vacuum container arranged on the outer layer. A rotary shaft is arranged in the center of the vacuum container. A radial-axial permanent magnetic bearing is nested in the upper end of the rotary shaft. The lower end of the rotary shaft is sleeved with a flywheel, a single-winding outer rotor magnetic suspension switch reluctance motor, and a permanent magnetic bias radial-axial magnetic bearing successively from top down. The rotary shaft penetrates through the center of the flywheel and is connected with the flywheel. The flywheel is nested in an outer rotor of the single-winding outer rotor magnetic suspension switch reluctance motor. According to the invention, by combining that the single-winding outer rotor magnetic suspension switch reluctance motor can drive the flywheel directly and has a high-speed suspension function with that the radial-axial magnetic bearing and a hybrid magnetic shaft have characteristics of controllable suspension in forced uninstallation, five degree of freedom and high-reliability suspension of the flywheel are realized. Besides, operation speed of the flywheel is increased and system power consumption and size are reduced.

Description

technical field [0001] The invention belongs to the technical field of electric energy storage, and in particular relates to a novel flywheel energy storage, which is especially suitable for uninterruptible power supply, new energy power generation, distributed power supply system, hybrid vehicle, aerospace and other fields. Background technique [0002] With the development of new energy power generation, distributed power systems, hybrid vehicles, aerospace and other fields, energy storage technology has become a worldwide research topic. Among many energy storage technologies, flywheel batteries are highly valued at home and abroad for their advantages of high power, high efficiency, long life, high energy storage density, and cleanliness. As a new type of energy storage equipment integrating mechanical, control, and electronic technologies, flywheel batteries still have many technical problems that restrict their engineering applications, mainly in the performance of sus...

AI Technical Summary

Problems solved by technology

Compared with developed countries, my country's current technical level and investment scale are relatively low, and research on flywheel batteries is still in its infancy.

In particular, how to develop a flywheel battery that can be applied to aerospace has not been involved in China.

Although the research on foreign flywheel battery technology has made great progress, it is far from reaching the level of replacing other batteries. To develop this device, a series of technical problems need to be solved, mainly including: flywheel rotor design, magnetic bearing technology, vacuum technology, frequency conversion technology, reasonable structural design, etc.

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