Multi-section skewed pole rotor type permanent magnet wind-driven generator

Abstract

The invention discloses a multi-section skewed pole rotor type permanent magnet wind-driven generator which comprises a stator and a rotor, wherein tile-shaped platy permanent magnet S poles and tile-shaped platy permanent magnet N poles are respectively embedded on the outer wall of the rotor. The concrete embedding and arranging processes are as follows: the transverse permanent magnet S poles and the transverse permanent magnet N poles are alternately arranged at intervals around the outer wall of the left section of the rotor, the permanent magnets with the same polarity are sequentially arranged along the axial direction of the rotor to form 3-18 sections, and the permanent magnets with the same polarity at the back section and the front section are in contact and are misaligned for an arc length of 0.1-1.0 permanent magnet along the rotation direction. A plurality of sections of permanent magnets which are arranged in a misaligned way form a rotor skewed pole structure. When rotating, the rotor is continuously and sequentially tangential with a magnetic line of the stator along the axial direction, and the moment of resistance in the starting stage is small, thus the rotor can rotate at lower wind speed to achieve the purpose of power generation. The fluctuation of the torque output by the rotor is small, thereby remarkably reducing the rotational vibration and the noiseof the wind-driven generator and improving the power generation quality simultaneously. The multi-section skewed pole rotor type permanent magnet wind-driven generator is suitable for being used as generators of different powers.

Description

technical field [0001] The invention relates to a wind power generator, in particular to a permanent magnet wind power generator provided with a multi-segment oblique pole rotor. Background technique [0002] The main component of the permanent magnet wind power generator is a pair of matched stator and rotor. The existing permanent magnet wind turbine rotor has a straight-pole structure, that is, the outer wall of the rotor is evenly distributed parallel to the axis and arranged at intervals with elongated permanent magnet N poles and permanent magnet S poles. When the straight pole rotor rotates, a maximum magnetic field force will be generated between the strip-shaped permanent magnet N pole and permanent magnet S pole and the magnetic pole of the stator, forming the resistance torque of the rotor rotation. Therefore, the rotor needs to be driven by a higher wind speed to overcome the drag distance and rotate to make the generator enter the power generation state. Altho...

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the deficiency of large rotational resistance torque in the prior art, and proposes a multi-stage oblique rotor type permanent magnet wind power generator

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