Miniature direct-drive permanent magnet synchronous aerogenerator and its small-sized wind power generation system

Abstract

The invention discloses a small-sized direct-drive permanent magnetism synchronous aerogenerator and a generating system thereof. The aerogenerator comprises a shell which is supported with a rotating shaft by a bearing; a main stator and an auxiliary stator are fixed in the shell, and the main stator is sheathed on the circumstance of the auxiliary stator; a main stator winding and an auxiliary stator winding are arranged respectively on the main stator and the auxiliary stator, and a rotor which is connected with the rotating shaft is arranged between the main stator and the auxiliary stator; an outer permanent magnet and an inner permanent magnet which are corresponding to the positions of the main stator and the auxiliary stator are respectively arranged on the rotor; one group of winding in the auxiliary stator winding is connected with a direct current power supplying regulation control end. The generating system also comprises an electrical energy memorizer, a direct current power supplying adjustor, a controller and the like, the aerogenerator can adopt a method of power regulation and energy compensation to keep the stability of the wind energy generating system, thus leading the working efficiency of the whole generating system to be effectively improved.

Description

Technical field [0001] The invention relates to a wind power generator and a wind power generation system, in particular to a small wind power generator and a wind power generation system thereof. Background technique [0002] Wind power generation is the fastest growing type of renewable energy technology. Commonly used are AC asynchronous generators and doubly-fed asynchronous generators. In wind power systems, gears are required to increase speed. For doubly-fed asynchronous generators, carbon brushes and sliding This kind of wind power system has high manufacturing cost, poor reliability, and serious noise pollution. [0003] Gearless, direct drive, and brushless have attracted people's attention. The new wind power generation system scheme is a direct drive multi-pole permanent magnet synchronous generator with variable speed operation, variable torque adjustment, low speed, high efficiency, and high power factor. Become a hot spot of current research and development. [000...

AI Technical Summary

Problems solved by technology

However, the manufacturing process of the multi-slot multi-pole structure is relatively complicated, and the performance is unstable, so the best use effect cannot be achieved, and the motor also has the disadvantages of large size and high cost, and it also needs the cooperation of a reduction box. Therefore, the cost of small wind turbines cannot be further reduced

Traditionally, there are technical prejudices, and it is believed that the relatively simple structure with few slots and few poles will cause problems such as excessive radial electromagnetic force, severe vibration and high noise. It has been only used in small or micro generators.

Generators with low speed and high torque usually adopt a relatively complex multi-slot and multi-pole structure, while the relatively simple structure with few slots and few poles has not been used or tried in low-speed and high-torque generators.

[0006] In addition, in the patent literature with the publication number CN101017998A and the publication date being August 15, 2007, a direct-drive excitation wind force using a double-stator structure is disclosed. Generators use a double-stator structure to increase power density and capture the maximum wind energy. Although a certain use effect is achieved, the fan with this structure can only simply increase the power density, and it cannot work under the condition of a wide range of wind speed changes. Stable, and in the case of simply increasing the power density, the manufacturing cost is too high

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