Composite material flywheel rotor and manufacturing method thereof

Abstract

The invention provides a composite material flywheel rotor, which is formed by winding a magnetic powder fiber layer on the inner layer and a composite fiber layer on the outer layer; the outer side of the magnetic powder fiber layer is a composite material layer which is formed by sequentially winding a plurality of composite fiber materials; an upper magnetic pole and a lower magnetic pole withdifferent structures are formed after the magnetic powder fiber layer is magnetized, the upper half part of the magnetic pole is used as a rotor part of a radial magnetic suspension bearing, and the lower half part of the magnetic pole is used as an excitation magnetic pole of the motor. The invention further provides a manufacturing method of the composite material flywheel rotor, which comprisesthe following steps: 1) respectively manufacturing and winding the magnetic powder fiber layer and the other composite layers; 2) respectively magnetizing the upper portion and the lower portion of the magnetic powder fiber layer, using a cylindrical tire shaft when the composite layer is wound, and adopting a bidirectional heating method for curing while winding. According to the composite material flywheel rotor and the manufacturing method in the invention, the circumferential stress concentration problem and the problem of large heating amount loss of the rotor eddy current are solved; and the rotor can be used for manufacturing the higher-rotation-speed flywheel energy storage device.

Description

technical field [0001] The invention belongs to the field of high-speed motors, and relates to a high-speed flywheel rotor made of composite materials integrating a motor / generator permanent magnet rotor and an energy storage flywheel and a manufacturing method of the flywheel rotor. Background technique [0002] A flywheel is a device that uses the inertia of a rotating object to store energy. Compared with energy storage devices such as batteries, capacitors, and inductors, it has the advantages of large energy storage capacity, long service life, high efficiency, multiple continuous charge and discharge, clean and pollution-free, etc. Flywheel energy storage is currently suitable for grid frequency modulation, small island grid peak shaving, grid security and stability control, power quality management, vehicle regenerative braking, and high-power pulse power supplies. At present, most flywheels still use metal hubs, and the processing technology is mature. However, com...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing high-speed flywheel structure will produce large eddy current loss at high speed, the rotor will generate a lot of heat, and it will be difficult to dissipate heat in a vacuum environment, which will easily lead to the problem of demagnetization of the permanent magnet block

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