Water cooling structure of axial magnetic flux permanent-magnet wind driven generator

Abstract

The invention provides a water cooling structure of an axial magnetic flux permanent-magnet wind driven generator. The water cooling structure comprises a stator iron core and a stator winding wound on the stator iron core, wherein a cooling sandwich layer is arranged in a disc body of the stator iron core, the surface of the cooling sandwich layer is provided with a water inlet and a water outlet, a cooling flow passage connected with the water inlet and the water outlet is arranged inside the cooling sandwich layer, is in a double-helix structure in the radial direction of a motor and is connected through a bent pipe in a position near to a rotating shaft in the disc body of the stator iron. The water cooling structure has the advantages that the power density of the axial magnetic flux permanent-magnet wind driven generator can be improved to the highest power, in addition, the stator winding temperature of the motor is effectively reduced, and the local overheat point is prevented from generating inside the motor.

Description

technical field [0001] The invention relates to an axial flux permanent magnet wind-driven generator, in particular to a water-cooling structure capable of effectively reducing the temperature rise of the axial flux permanent magnet wind-driven generator. Background technique [0002] The axial flux permanent magnet motor has a simple structure, a large inner diameter of the stator, and a large rotor size and moment of inertia. It has a significant effect on smoothing the electromotive force fluctuation caused by wind fluctuations, and has attracted increasing attention. It is especially suitable for today's wind power generation field. However, for an axial flux motor with a single stator-single rotor structure, it is easy to generate axial magnetic pull during operation, which increases the load on the bearing, and the rotor magnetic field alternates at the center of the stator, causing loss and reducing the efficiency of the motor. For the axial flux motor with multi-disk...

AI Technical Summary

Problems solved by technology

However, for an axial flux motor with a single stator-single rotor structure, it is easy to generate axial magnetic tension during operation, which increases the load on the bearing, and the rotor magnetic field alternates at the center of the stator, causing loss and reducing the efficiency of the motor

For the axial flux motor with multi-disk structure, although the torque of the axial flux motor can be increased, it is not conducive to heat dissipation, which will increase the temperature rise of the motor and affect the service life of the motor

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