An external rotor wind generator

Abstract

Provided is an external rotor wind driven generator, which belongs to the technical field of new energy generating, and comprises a shaft, a turbine fan blade, a first armature winding, a second armature winding, a rotor iron core, a permanent magnet, a stator iron core, and a housing. The external rotor wind driven generator is characterized in that the inner side of the rotor iron core is provided with protruding rotor teeth in the number of 6k (k is a positive integer); the stator iron core fixed to the shaft is composed of U-shaped sub-stator iron cores in the number of 5k, and the two sides of the sub-stator iron core are respectively provided with a stator tooth protruding along the radial direction; a yoke part at the middle of the sub-stator iron core is embedded with the permanent magnet magnetizing along the axial direction; the root part of the stator tooth at one side of the sub-stator iron core is winded with the concentration type first armature winding , and the root part of the stator tooth at the other side of the sub-stator iron core is winded with the concentration type second armature winding. The invention is advantageous in that the rotor structure is simple and reliable, and the positioning force and the moment of inertia is small, and response is rapid; the demagnetizing armature reaction can be weakened, and the power density excitation and coiling mode can be improved, and thereby the external rotor wind driven generator is very suitable for the wind driven generator of gentle breeze.

Description

technical field [0001] An external rotor wind power generator belongs to the technical field of new energy power generation. Background technique [0002] Energy and environmental issues have become the main issues facing global sustainable development. Wind energy is a renewable, non-polluting green energy with abundant reserves. As a renewable energy technology with competitiveness and development prospects, wind power generators have been valued worldwide, and wind power generator technology has shown a momentum of rapid development. [0003] At present, there are patent applications for wind power generators with outer rotor structure, such as the patent application number 201410549517.6: a vertical axis outer rotor magnetic levitation wind power generator. The application motor has the characteristics of low starting wind speed and reliable operation, and can be used in lighting, unattended equipment and power supply occasions far away from the grid. However, the wind...

AI Technical Summary

Problems solved by technology

The cost of the direct-drive structure of the motor is relatively high. In order to allow the direct-drive motor to generate electricity when the wind speed is very low, the number of pole pairs of the motor is large and the structure is complicated, so it is not suitable for use as a wind turbine for light wind starting.

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