Brushless Motor Rotor Dynamic Balancing Machine

Brushless Motor Rotor Dynamic Balancing Machine

Brushless motor rotor is a kind of motor rotor that uses permanent magnet instead of traditional brush and electrode. It has the advantages of high efficiency, low noise and long life, so it is widely used in various motors. In the manufacture of brushless motor rotor, dynamic balancing is a very important process, which can ensure the stability and life of the rotor. This article will introduce the relevant knowledge of brushless motor rotor dynamic balancing.

1.Composition of brushless motor rotor 

The brushless rotor is mainly composed of permanent magnet, rotor core and rotor shaft. Among them, the permanent magnet is the main magnetic field source of the rotor, the rotor core is an important part of supporting and fixing the permanent magnet, and the rotor shaft is a part that connects the rotor core and the motor bearing.

2.Principle of brushless motor rotor dynamic balancing

The principle of dynamic balancing of the brushless rotor is the same as that of the traditional motor rotor, that is, by adding correction mass on the rotor, then the rotor will not appear obvious vibration when rotating. The purpose of brushless rotor dynamic balancing is to eliminate the unbalanced mass of the rotor, and make the vibration of the rotor as small as possible when the rotor is running.

3.Process of brushless motor rotor dynamic balancing

The process of dynamic balancing of brushless motor rotor includes the calculation and addition of correction mass, rotor vibration test and dynamic unbalance correction. The specific process is as follows:

(1) Calculation and addition of the correction mass: First of all, according to the geometric size, material density and other parameters of the brushless rotor, , calculate the size and position of the correction mass that needs to be added on the rotor, and then install the correction mass in the corresponding position.

(2) Rotor vibration test: After the installation of the correction mass, the rotor vibration test is carried out to measure the rotor vibration amplitude and phase, and record it.

(3)Dynamic unbalance correction: According to the vibration test results, calculate the size and position of the correction mass that needs to be increased or decreased, and carry out the corresponding dynamic unbalance correction. Repeat the above steps until the rotor vibration amplitude and phase meet the requirements.

4.Importance of brushless rotor dynamic balancing

The importance of brushless rotor dynamic balance is that it can avoid rotor vibration and noise caused by unbalanced mass, extend the service life of the rotor, and improve the efficiency and performance of the motor. In order to control the vibration, noise and service life of the permanent magnet brushless motor, the rotor dynamic balancing accuracy of the permanent magnet brushless motor must be achieved at a higher level. Choose Jianping's newly developed brushless rotor dynamic balancing machine, can effectively solve the dynamic balancing problem of brushless rotor and improve production efficiency.