Composite magnetic field modulation type magnetic coupling

Abstract

The invention discloses a composite magnetic field modulation type magnetic coupling. The magnetic coupling comprises a radial structure and an axial structure; the radial structure comprises two stators and three rotors, wherein the two stators and the three rotors are coaxially arranged in a sleeving mode, and the outer stator, the outer rotor, the middle rotor, the inner stator and the inner rotor are sequentially arranged in a radial direction from outside to inside; permanent magnets are embedded in the inner surface of the outer stator; and a copper ring is arranged on the surface of theinner rotor. The basic working principle of the axial structure is consistent with that of the radial structure; and the axial structure is different from the radial structure in that only a magneticfield direction is changed from radial distribution to axial distribution. With the composite magnetic field modulation type magnetic coupling of the invention adopted, fluctuating low-speed large-torque input can be converted into constant high-speed low-torque output. The composite magnetic field modulation type magnetic coupling is different from an existing structure in that the composite magnetic field modulation type magnetic coupling not only ensures a high speed-up ratio, but also has faster dynamic response, and has a bright application prospect in a wind power generation system.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet motors, and more specifically relates to a composite magnetic field modulation magnetic coupling. Background technique [0002] With the gradual consumption of non-renewable energy, the development of new energy technology has received more and more attention. Wind power, due to its abundant global wind energy reserves, cleanliness and renewability, has been valued by the power industry and applied to the link of power production. In a traditional wind power generation system, a mechanical gearbox is often required to convert the high-torque and low-speed of the wind blades into a high-speed, low-torque output, and then act on the generator; due to the instability of the wind speed, the generator's The speed will fluctuate, which will affect the stability of the power generation frequency. The inverter is required to perform rectification and inversion to obtain electric energy with the ...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to provide a composite magnetic field modulation magnetic coupling, aiming at solving the problem that the higher the speed-up ratio of the existing magnetic field modulation magnetic coupling, the more significant the unstable factors are. defect

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