Magnetic-field modulation wave power generator with permanent-magnet concentric structure

Abstract

The invention relates to a magnetic-field modulation wave power generator with a permanent-magnet container structure. The magnetic-field modulation wave power generator comprises a stator and an outer rotor, wherein the outer rotor comprises a rotor core and a surface-mounting permanent body, a magnetic regulation block is additionally arranged in a gap between the outer rotor and the stator andis used for modulating a magnetic field, a circle center of an outer edge of a magnetic pole of each permanent magnet is not coincided with a circle center of an inner diameter, the thicknesses of thepermanent magnets are not uniform, the circle center of an arc of the outer edge of the magnetic pole moves at concentric distance h so that the arc radius of the outer edge is reduced, and the thickness of the permanent magnet of the outer rotor is gradually reduced from a middle part from two ends.

Description

technical field [0001] The invention belongs to the field of motor design, and in particular relates to a magnetic field modulation wave generator. Background technique [0002] As a renewable, reusable, and abundant green energy, wave energy has attracted the attention of countries all over the world in recent years. my country is a large oceanic country. From the Bohai Sea, the Yellow Sea, the East China Sea to the South China Sea, the total area of ​​the ocean exceeds 4.7×10 6 km 2 , the coastline is more than 18,000km long, and the wave energy density in the sea is about 2-5kW / m. In view of the characteristics of high energy density and low movement speed of wave energy, there are two transmission modes of wave power generation system: direct drive and speed-increasing gearbox. The structural design and process manufacturing of traditional direct-drive motors are relatively difficult, and they are large in size and high in cost. However, the speed-up gearbox will caus...

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Problems solved by technology

But the problem is that the cogging torque generated by the interaction between the surface-mounted permanent magnet and the stator armature core will cause vibration and noise of the torque, which will reduce the stability of the motor operation, affect the performance and accuracy of the control system, and affect the wave Great impact on power generation system

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