High-speed permanent magnetic wind driven generator rotor sheet

Abstract

The invention relates to a high-speed permanent magnetic wind driven generator rotor sheet, wherein a permanent magnet groove below each rotor magnetic pole is of a double section symmetrical structure which is isolated by an intermediate magnetic bridge; an axial ventilation slot is formed between the adjacent two magnetic poles; and the excircle of the rotor magnetic pole is an eccentric circular arc, the permanent magnet groove is provided with a permanent magnet mounting and locating step, tightening screw vents, lamination location holes and waist-shaped lightening holes are uniformly distributed in the rotor sheet, and a keyway is formed in the inner circle of the rotor sheet. After the integral round rotor sheet is adopted, a rotor has a simpler structure, a permanent magnet is not needed to be fixed through other measures, and the rotor sheet is easy to process and produce; the intermediate magnetic bridge can be used for effectively improving the rotor strength, and accordingly, the operation reliability of the rotor is improved; the eccentric circular arc of the rotor magnetic pole and the structural parameters of the magnetic bridge are adjusted, the output performance of a generator can be effectively improved, and the anti-demagnetizing performance of a motor is improved under the short circuit condition; and the ventilation slot is formed between the rotor poles, so the ventilation and heat dissipation capabilities of the whole generator can be effectively improved.

Description

technical field [0001] The invention relates to a high-speed permanent magnet wind power generator rotor stamping. Background technique [0002] At present, high-speed permanent magnet wind turbines are being used more and more because of their small size, light weight, and high efficiency. The rotor structure of high-speed permanent magnet wind turbine mainly has two forms: surface mount type and built-in type. In the surface-mounted structure, the permanent magnet poles are usually fixed by inter-pole compression. Under the action of electromagnetic force, centrifugal force and other factors, the fastening parts are easy to loosen or even fall off, which will bring serious failures to the safe operation of the generator. Hidden danger. Moreover, in the case of a short circuit, the permanent magnet is prone to local loss of magnetism, which seriously degrades the performance of the generator. In the built-in structure, the rotor magnetic pole adopts the hanging pole form...

AI Technical Summary

Problems solved by technology

The manufacturing and assembly process of this rotor structure is complicated, and the centrifugal force will cause large deformation of the rotor magnetic poles during high-speed operation, and stress concentration is likely to occur at the tail of the rotor magnetic pole T, which reduces the reliability of the rotor structure

In order to improve the strength of the rotor, the number of T-tails can be increased or fastening measures similar to the surface-mounted structure can be adopted, but this will instead make the rotor structure more complicated and cause difficulty in ventilation and heat dissipation of the rotor

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