Novel flywheel energy storage device

Abstract

The invention discloses a novel flywheel energy storage device which is characterized in that a rotary shaft is arranged in the internal center of a vacuum container; a permanent magnetic radial bearing is embedded in the upper part of the rotary shaft; the middle and lower part of the rotary shaft are sleeved by a flywheel, a single-winding outer rotor magnetic suspension switch reluctance motor and radial and axial permanent magnet biased magnetic bearings in sequence from top to bottom; the single-winding outer rotor magnetic suspension switch reluctance motor is embedded in the inner side of the lower end of the flywheel; each set of windings is independently controlled, and radial two-degree-of-freedom suspension force can be provided in addition to electrical / power generation functions. According to the novel flywheel energy storage device, by utilizing the characteristic that the single-winding outer rotor magnetic suspension switch reluctance motor can directly drive the flywheel, and a high-speed self-suspension function, and organically combining the characteristics of good unloading property and controllable suspension of the axial permanent magnet bearing, the radial permanent magnet bearing and a hybrid magnetic bearing, the five-degree-of-freedom, low-loss and high-reliability suspension of the flywheel are realized, the running speed of the flywheel is increased, and the power consumption and volume of a system 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, 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 suspension support systems and integrated high-speed / ultra-high-speed motors. an...

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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