Permanent magnetism aerogenerator and rotor thereof

Abstract

The invention discloses a permanent magnetism aerogenerator and a rotor thereof. A magnet yoke of a rotor includes grooves distributed along the circumferential direction, and the sidewall of each groove includes protruded ribs; the shape of the bottom side of a magnetic pole module matches that of the groove, and one part of the magnetic pole module is embedded into the groove; and a fixation part for compressing the magnetic pole module is arranged on the protruded ribs. The grooves are used to bear the magnetic pole module, the rotor and stator assembling difficulty and the installing and positioning difficulty of the magnetic pole assembly are reduced greatly, the fixation part is used to further fix the magnetic pole module, and the rotor processing difficulty and cost are reduced greatly.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a permanent magnet wind generator rotor and a permanent magnet wind generator including the same. Background technique [0002] Wind power generation has been paid more and more attention by countries all over the world because of its environmental protection and pollution-free. The rotor of a permanent magnet synchronous wind turbine includes a rotor yoke and a permanent magnet. Generally, the permanent magnet is fixed to the rotor yoke by means of built-in or surface mount. The surface-mounted fixing has the advantages of relatively easy processing of the rotor yoke, relatively small amount of permanent magnets, relatively little flux leakage, and obvious gain effect after the permanent magnet shape is optimized. In order to avoid the corrosion and pollution of the permanent magnet due to environmental reasons, the permanent magnet is usually painted or encapsulated in the...

AI Technical Summary

Problems solved by technology

However, this fixing method has three disadvantages that are difficult to overcome: first, the positioning of the magnetic pole module is relatively difficult during installation; second, in order to overcome the huge tangential force received by the magnetic pole module when the generator is running, many bolts must be installed on the fixed parts In order to limit the possible circumferential movement of the magnetic pole module, there is also the risk of bolt fatigue damage; the other is that the stator and rotor must be assembled after the magnetic pole module is installed. The huge magnetic force generated by the permanent magnet greatly increases the difficulty of assembly. , this shortcoming is more obvious for large diameter rotors

However, the processing procedure of the "T"-shaped groove is cumbersome, requires high precision, and the processing cost is high; at the same time, the processing and packaging of the magnetic pole module matching the "T"-shaped groove is also difficult, and the structural strength requirements are also high.

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