Brushless direct current permanent magnet motor having characteristics of low noise, low vibration and low temperature rise and assembly technology thereof

Abstract

The invention relates to a brushless direct current permanent magnet motor having characteristics of low noise, low vibration and low temperature rise. The brushless direct current permanent magnet motor consists of a motor rotor, a motor stator, a front end cap, a motor housing and a rear end cap. The front end cap and the rear end cap are sealedly installed at two ends of the motor housing to form an integral motor housing; the motor stator is arranged inside the motor housing; and the motor rotor is installed inside the motor stator. The brushless direct current permanent magnet motor is characterized in that: an iron core of the motor stator is formed by lamination of a plurality of punching sheets that are manufactured by Fe-Ni soft magnetic alloy; the punching sheets are in a circular ring shape and grooves that are arranged regularly are made on inner circles. When the plurality of punching sheets are laminated, an angle is formed by staggering of the grooves of adjacent punching sheets, so that a chute is formed at a stator slot; and an enameled wire is wound in the chute. According to the invention, a heat dispersion performance, a stator lamination mode and a balancing performance are improved; therefore, the motor has characteristics of high rotating speed, low noise, low vibration and low temperature rise as well as is suitable for application to a special using occasion. When the motor that is assembled by the assembly technology in the invention works at 7000RPM, the temperature rise is not more than 12 DEG C and the noise is less than 60dB.

Description

technical field [0001] The invention relates to the technical fields of power electronics, machinery, etc., and is a brushless DC permanent magnet motor that needs to be produced under special conditions such as high speed, low noise, low vibration, and low temperature rise. Background technique [0002] Brushless Direct Current Motor (BLDCM) is also called DC permanent magnet motor, or permanent magnet synchronous motor. Replace the carbon brush commutator with Hall sensor, and use NdFeB as the permanent magnet material of the rotor, so that the performance of the motor exceeds all the advantages of the traditional DC motor, and at the same time solves the shortcomings of the carbon brush slip ring of the DC motor. When the motor works at 7000RPM, the temperature rise is not greater than 12°C, and the noise is less than 60dB. To ensure the above characteristics of the motor at high speed, it is difficult to guarantee the traditional motor design and assembly. [0003] The ...

AI Technical Summary

Problems solved by technology

If the heat source and vibration source are not controlled, the temperature rise of the motor will be too high during operation, the vibration and noise will be too large, and the special use requirements of the motor cannot be guaranteed.

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