Semi-closed permanent magnet motor cooling system

Abstract

The invention belongs to the technical field of motor cooling systems, and provides a semi-closed permanent magnet motor cooling system in order to solve the problems that the cooling effect cannot beguaranteed, and no scrap iron or dust enters a strong magnetic rotor of a motor under the condition that the operation environment of the motor is severe. The system comprises a rotor, a rotating shaft, a casing, a stator core, a stator winding, an air inlet hole, an air outlet hole and a rotor sleeve structure, and the rotor sleeve structure sleeves the rotor to isolate the rotor from a stator;and the air inlet hole and the air outlet hole separately penetrate through an end cover arranged on the casing. In the working process, the external cooling air is guided in through the air inlet hole, flows through the stator winding at the end part of one side of the motor, the cooling channel on the stator iron core and the stator winding at the end part of the other side of the motor and thenflows out through the air outlet hole so as to cool the semi-closed permanent magnet motor. According to the present invention, foreign matters can be prevented from entering the rotor, and the cooling effect of the motor is not affected.

Description

technical field [0001] The invention belongs to the technical field of motor cooling systems, and in particular relates to a semi-closed permanent magnet motor cooling system. Background technique [0002] The cooling methods of conventional permanent magnet motors are mainly divided into direct cooling (internal cooling) and indirect cooling (external cooling), and the commonly used cooling methods mainly include: 1) surface cooling: the cooling area of ​​this cooling method is to use the motor casing surface, to increase the heat dissipation area, and cooling fins are commonly used on the surface of the casing. This cooling method has a simple structure and is suitable for small and medium-sized enclosed motors, but its cooling effect is limited; 2) Open ventilation cooling: This cooling method uses the cooling medium (generally air) directly into the motor, and the medium absorbs energy and discharges it to the surrounding environment. This cooling method is suitable for ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the motor cannot not only ensure the cooling effect but also ensure that the strong magnetic rotor of the motor does not enter the iron filings and dust in the harsh operating environment, the present invention provides a semi-closed The permanent magnet motor cooling system includes a stator, a rotor, a rotating shaft and a casing. The stator includes a stator core and a stator winding. The stator winding is arranged at both ends of the stator core, and the stator core is fixed on the inner wall of the casing. The system It also includes an air inlet hole, an air outlet hole and a rotor sleeve structure, and the rotor sleeve structure is sleeved on the outside of the rotor to isolate the rotor from the stator; the air inlet hole, the outlet The air holes are arranged through the first end cover and the second end cover of the casing respectively, and the air inlet hole and the air outlet hole are located between the rotor sleeve structure and the casing; the air inlet hole, The air outlet hole and the communication gap between them constitute a cooling channel;

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