Coolant-based brushless doubly fed machine cooling structure

Abstract

The invention discloses a coolant-based brushless doubly fed machine cooling structure. A cooler is mounted at the top part of a casing; a sealing cover passes through a stator core bore, extends to the inner part of the cooler, and is isolated from rotor core space in the casing to form closing space; a coolant is injected in the sealing cover; a vent pipe is located at the axial outer side of the stator core; a plurality of sub plates are connected between a rotation shaft and the rotor core, and space between the sub plates forms a core axial air duct; an air gap is formed between the rotorcore and the inner circumferential surface of the sealing cover; an inner fan is fixed at a shaft extension end of the rotation shaft for generating a power airflow in a rotor circulation air path formed by the rotor core space, the vent pipe, the core axial air duct, a rotor core radial air duct and the air gap. In combination of the design of the brushless doubly fed machine core and a winding,a set of stator independent cooling loop and a set of rotor independent cooling loop are adopted, a complex cooling structure is reduced while the motor operation efficiency is improved, the use efficiency of the coolant is increased, the cost is reduced, and the reliability is improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a cooling liquid-based cooling structure for a brushless double-fed motor. Background technique [0002] Brushless double-fed motors have the advantages of simple structure, safe and reliable operation, and low maintenance costs. In the motor industry, the research and development and improvement of cooling technology are more significant for brushless double-fed motors. It has a wide range of applications, among which large-capacity AC frequency conversion speed regulation, marine shaft power generation, hydropower generation and wind power generation have fully demonstrated its application value. However, the processing technology of the existing brushless doubly-fed motor windings causes uneven distribution of the magnetic field during the operation of the motor, which in turn leads to a low power factor of the motor, low efficiency and poor performance of the motor. And it ag...

AI Technical Summary

Problems solved by technology

[0008] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art, to provide a cooling liquid-based brushless doubly-fed motor cooling structure, to solve the low power factor of the brushless doubly-fed motor cooling structure of the existing structure, The efficiency is not high, resulting in a large amount of heat dissipation, and the existing cooling system cannot cool the stator and rotor separately, etc.

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