Concentrated excitation doubly salient motor with excitation winding cooling function

Abstract

The invention relates to a concentrated excitation doubly salient motor with an excitation winding cooling function, which comprises a stator and a rotor positioned in the middle of the stator, the stator is provided with a plurality of stator salient poles, a stator slot is formed between adjacent stator salient poles, an armature winding and an excitation winding are arranged in the stator slot, a cavity is arranged in the excitation winding, a conductor tube is arranged in the cavity of the excitation winding, and a coolant is filled in the conductor tube. According to the invention, the circulating coolant is introduced into the conductor tube, so that a good cooling effect can be provided for the excitation winding. Direct current rectified by the generator is introduced through the conductor tube, the generated magnetic potential and the magnetic potential of the excitation winding jointly form excitation magnetic potential, an additional power supply is not needed, and the magnetic potential of the excitation winding can be improved.

Description

technical field [0001] The invention relates to a concentrated excitation double salient pole motor with the cooling function of the excitation winding, and belongs to the field of design optimization of the motor winding and the technical field of motor thermal management. Background technique [0002] Electrically excited double salient pole motors can be divided into concentrated excitation double salient pole motors and distributed excitation double salient pole motors according to the different winding methods of the excitation windings. The traditional concentrated excitation double salient pole motors have a 12 / 8 pole structure, and the stator teeth are parallel. Teeth, every three stator poles use a set of field windings. Compared with the distributed excitation doubly salient pole motor, the excitation windings of the concentrated excitation doubly salient pole motor are more densely distributed, and the heat dissipation is more difficult. When the temperature is to...

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Problems solved by technology

Compared with the distributed excitation double salient pole motor, the excitation winding distribution of the concentrated excitation double salient pole motor is more dense, and the heat dissipation is more difficult. When the temperature is too high, the insulation between the windings may be damaged and the motor may be damaged.

[0003] Commonly used cooling methods for motors include natural cooling, air cooling, water cooling, oil cooling, etc. Among them, air cooling and oil injection cooling have a good cooling effect on the surface of the excitation winding, but the excitation winding of the concentrated excitation double salient pole motor is composed of multiple round The wires are bundled, and the number of wires is more and the volume is larger. For the conductor in the center of the winding, no cooling method can effectively reduce its temperature, and the excitation winding is still in danger of high temperature damage.

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