Surface-mounted high-speed permanent magnet motor and motor cooling air path

Abstract

The invention discloses a surface-mounted high-speed permanent magnet motor and a motor cooling air path. The motor cooling air path comprises an air inlet formed in the axial middle part of the shell and two air outlets formed in the two axial ends of the shell; the air inlet is communicated with any air outlet through a gap air duct; the gap air ducts communicated with the two air outlets are mutually independent; any gap air duct is adjacent to the rotor or arranged on the rotor. Compared with a conventional motor air cooling structure, the motor cooling air path is easy to process, a cooling medium can enter from the axial middle part of the motor with a higher rotor temperature, and the cooling medium is shunted through the gap air channel and then moves towards the two axial ends of the motor respectively. According to the operation mode, the air pressure at the air inlet can be reduced, the air supply power and the air abrasion loss of the motor are reduced, the problem that the axial temperature of the motor is too high is effectively solved, and the requirements of the motor on the machining performance, the installation performance and the working performance including heat dissipation are better balanced.

Description

technical field [0001] The invention relates to the field of motors, in particular to a motor cooling air path. It also relates to a surface-mounted high-speed permanent magnet motor, including the above motor cooling air path. Background technique [0002] The main structure of the rotor of the surface mount permanent magnet motor includes a sheath, a permanent magnet and a shaft. Among them, common sheaths include alloy sheaths and carbon fiber sheaths, but no matter which sheath is used, it will inevitably cause the temperature of the rotor to rise beyond the standard, which will affect the working performance of the motor. Especially for high-power high-speed motors and ultra-high-speed permanent magnet motors, the rotor and its permanent magnets are more slender, which leads to a high temperature in the middle of the rotor and is difficult to cool, which is likely to cause loss of magnetism or failure of the carbon fiber sheath . [0003] Therefore, how to effectivel...

AI Technical Summary

Problems solved by technology

Among them, common sheaths include alloy sheaths and carbon fiber sheaths, but no matter which sheath is used, it will inevitably cause the temperature of the rotor to rise beyond the standard, which will affect the working performance of the motor

Especially for high-power high-speed motors and ultra-high-speed permanent magnet motors, the rotor and its permanent magnets are more slender, which leads to a high temperature in the middle of the rotor and is difficult to cool, which is likely to cause loss of magnetism or failure of the carbon fiber sheath

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