How does a brushless motor reduce vibration?

Brushless motors are now more and more popular. In addition to having better performance parameters and adjustable speed than brushed motors, they also overcome the shortcomings of brushed motors such as short lifespan and cost factors such as driver control boards. It is believed that brushless motors will occupy an increasingly important position in the motor market.

When the brushless motor is connected to the power supply, the shaft will rotate after the power is turned on, driving the relevant components to work. The rotation will naturally generate vibration, and the reasonable vibration value range is in line with the design performance parameters of the brushless motor. However, if the following work is not done well in the design and production process, the vibration will become a problem after the brushless motor works for a period of time.

1. Design drawing: Reasonably design the size of the motor and arrange the position of the stator and rotor, rationally wire and install the Hall sensor and driver. Starting from the design drawing, try to reduce the factors that may affect the vibration caused by the later production test.

2. Reduce vibration in the production process and do balance test processing: During the production process, wire lines, Hall sensors and drivers should be fixed. Test the vibration impact of these product components in operation, and adjust and optimize in time. The key point is to do the dynamic balance test of the inner rotor, high-precision automatic balance tester, with high-precision data and balance adjustment to ensure the reduction of vibration factors. The use of stable and durable bearings, such as imported bearings, can reduce the impact of vibration due to the friction between the shaft and the bearing. Of course, with the progress of domestic bearings, the gap between domestic and foreign bearings has gradually disappeared.

In the production process, it is also necessary to pay attention to the beating of the shaft center rotor, the concentricity of the assembly hole, the flatness, the verticality of the iron cylinder, etc., which will affect the vibration of the product.

3. If the adjustment of the product value can meet the performance requirements, the speed of the brushless motor can be appropriately reduced. We know that high speed will generate vibration and noise. If the speed is reduced, the vibration and noise will be reduced. Of course, the premise of reducing the speed is that the motor performance at this time is in line with customer requirements.

There are many ways to reduce vibration of brushless motors. We will continue to find and research. As long as some measures are used reasonably, the vibration of the motor can be reduced.