Permanent magnet brushless synchronous motor

Abstract

The invention relates to the technical field of motors, and discloses a permanent magnet brushless synchronous motor. The permanent magnet brushless synchronous motor comprises a shell, wherein a stator winding fixedly sleeves the inner surface of the shell; a rotor is movably mounted in the shell; a heat exchange tube is fixedly clamped on the inner side surface of the shell; and the front end ofthe heat exchange tube penetrates through the front face of the shell, extends out of the shell and fixedly communicates with a communicating sleeve. According to the permanent magnet brushless synchronous motor, the heat exchange tube is fixedly clamped in the clamping groove, so the front end of the heat exchange tube penetrates through the front surface of the shell and communicates with the communicating sleeve; and cold water is introduced into the communicating sleeve, penetrates through the shell through the heat exchange tube, and absorbs and conveys heat in the shell, so air in the external environment is prevented from being introduced into the shell when air-cooling heat dissipation is utilized, dust is effectively prevented from entering the shell, dust collection of the internal structure of the motor is avoided, the service life of the motor is effectively prolonged, the operation stability of the motor is improved, and use effect is good.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a permanent magnet brushless synchronous motor. Background technique [0002] A permanent magnet brushless motor is a permanent magnet motor that is commutated or current controlled by an electronic circuit. There are two types of permanent magnet brushless motors: sine wave drive and square wave drive; the driving current is a rectangular wave is usually called a permanent magnet brushless DC motor, and the driving current is a sine wave is usually called a permanent magnet AC servo motor. The induction type can be divided into sensor motor and positive sensor motor. The permanent magnet brushless motor can be regarded as a DC motor that replaces the mechanical commutation with an electronic commutation device. It is mainly composed of a synchronous motor body, a power electronic inverter, and a rotor position. consists of a detector and a controller. Among them, the rotor of t...

AI Technical Summary

Problems solved by technology

[0003] The existing permanent magnet brushless synchronous motor, in the process of use, due to the overheating of the motor during the rotation process, usually requires air cooling to dissipate the internal heat of the motor, ensure the stable operation of the motor, and avoid the internal overheating of the motor. The winding is burned, but the commonly used air-cooled heat dissipation effect is poor, and the motor is connected with the external environment. When the air-cooled heat dissipation is performed, the external dust enters the inside of the motor, causing dust collection inside the motor, and the dust removal effect is poor, which affects the stable use of the motor. The motor is easy to Faults, the service life of the motor is greatly reduced, and the use effect is not good

[0004] In addition, when the existing permanent magnet brushless synchronous motor is used outdoors in cold weather, the overall temperature of the motor is low, and the internal circuit of the motor is stiff. With the start of the motor, it drives the rotation and vibration of various components, making the original hardened circuit The structure breaks suddenly, and the brittleness brought by the cold weather in winter makes the motor prone to failure during startup, and the stable use effect in winter is not good

[0005] On the other hand, the existing permanent magnet brushless synchronous motor, in the course of use, when the motor is in abnormal use, there is a fault inside the motor. Usually, the fault is accompanied by a short circuit or a stall inside the motor, which will cause the internal temperature of the motor to rapidly increase. However, when a fault occurs during the use of the motor, it cannot be found in time, and it cannot be shut down for maintenance in time, and the use effect is not good

Images