Brushless dc motor with low noise, high torque features such as widely used conventional cars, new energy vehicles, pure electric vehicles, household appliances, medical equipment, industrial automation equipment, office automation equipment and other industries, because it has different specifications and types, so how to select the brushless dc motor, in order to meet the product performance requirements, it is very important.The following lihui motor introduces a few dc brushless motor selection principles.
1. Specification selection
In the case of adjustable power supply voltage, the specifications of dc motor whose torque and speed are close to the corresponding rating value of the product can be selected according to the actual needs, and the required speed can be obtained by changing the voltage;In the case of fixed power supply voltage, if there is no suitable brushless dc motor available for selection, the appropriate specification can be selected according to the torque, and the product voltage and speed can be adjusted appropriately.
2. Power selection
There is a limit to the high power output of the motor. If the power of the brushless dc motor is too small and the load exceeds the rated output power, the motor will be overloaded. In case of overload, there will be motor fever, vibration, speed decrease, abnormal sound and other phenomena.Too much power will cause economic waste.Therefore, it is very important to choose the power of the motor reasonably.
3. Type selection
The ferrite permanent magnet dc motor with high efficiency, low price and low temperature rise is preferred.Alnico permanent magnet dc motor or rare earth permanent magnet dc motor is only considered when the performance requirements are strict, the volume is small and the ambient temperature is high.