Permanent magnet generator with stator inclined grooves and inclined groove realization method of permanent magnet generator

Abstract

The invention discloses a permanent magnet generator with stator inclined grooves and an inclined groove realization method of the permanent magnet generator. The permanent magnet generator comprises a generator stator, wherein the stator comprises a stator casing and a stator iron core punching sheet and also comprises a plurality of convex strips, the convex strips are arranged on the inner wall of the stator casing according to a certain inclination, clamp grooves used for being clamped with the convex strips are arranged at the back side of the yoke part of the stator iron core punching sheet, the stator iron core punching sheets are overlapped onto the convex strips in a laminated way through the clamp grooves, and in addition, the clamp grooves have the same inclination as the inclination of the stator inclined grooves and the installation inclination of the convex strips after the lamination. The stator inclined grooves of the permanent magnet generator can be realized, the tooth groove torque is effectively reduced, meanwhile, the harmonic waves are reduced, in addition, few toolings are required by the stator inclined groove realization method, the cost is low, and the process is simple.

Description

technical field [0001] The invention relates to a permanent magnet generator, in particular to a permanent magnet generator with a stator chute and a method for realizing the chute. Background technique [0002] Permanent magnet direct drive generators have become one of the mainstream technologies for wind power generation due to their high reliability and low maintenance. However, due to the large size and weight of the high-power permanent magnet direct drive generator, the cogging torque is also large. The cogging torque of the permanent magnet motor increases with the improvement of the performance of the permanent magnet material. The interaction between the permanent magnet and the iron core inevitably produces cogging torque, which leads to torque fluctuations, resulting in large starting torque, vibration and Noise, they directly affect the start-up of permanent magnet generators and low wind speed power generation. Cogging torque is a unique problem of permanent ...

AI Technical Summary

Problems solved by technology

The use of inclined slots can effectively reduce the cogging moment, but it is difficult to realize the use of inclined slots in large permanent magnet generators

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