Five-phase permanent magnet wind turbines with independent phases

Abstract

The invention provides an independent five-phase permanent magnet wind driven generator which comprises a stator core, an outer rotor core, a permanent magnet, an armature winding, a stator fixing block and a shaft. The independent five-phase permanent magnet wind driven generator belongs to the technical field of special motors. 16X inward protruded rotor poles are arranged on the outer rotor core of a motor; X is a positive integer; 16X rotor poles are uniformly distributed; the stator core is equipped with 5X sub-cores in total; each sub-core is equipped with three stator poles; the pole arc length of the stator pole on the middle position is 1.53 times of the pole arc length of the rotor; the stator pole width on the two sides is equal to the rotor pole width; and permanent magnets are embedded between the stator pole on the middle position and the stator poles on the two sides on the sub-cores. According to the invention, the sub-stator cores of the motor are independent from each other, so that the windings wound on the stator poles are separated from each other. When one phase is in fault, the other windings can run in a fault-tolerant form, so that the reliability of the system can be increased.

Description

technical field [0001] The invention relates to a five-phase permanent magnet wind power generator with independent phases, belonging to the technical field of special motors. Background technique [0002] In recent years, wind power has grown rapidly and has become the fastest growing new energy. Wind turbines undertake the task of converting wind energy into electrical energy, and are the core components of wind power generation systems. With the development of the overall technology of wind power generation, wind power generators have also evolved from early DC generators and cage-type asynchronous generators to current doubly-fed asynchronous generators and low-speed direct-drive permanent magnet synchronous generators. [0003] Due to the characteristics of high power density, high efficiency, high reliability, low maintenance cost, good grid compatibility and strong low voltage ride-through ability, permanent magnet motor has become the most promising wind power gener...

AI Technical Summary

Problems solved by technology

[0006] At present, there are research reports on wind turbines, and there are also research reports on permanent magnets placed on the stator side, but so far no research reports on the relative independence of stator cores and the matching relationship between different stator pole arc lengths have been found.

At the same time, the existing literature does not achieve effective isolation between phases, so faulty windings may have a negative impact on non-faulty windings and even cause fault propagation

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