Brushless DC motor is widely used in AI intelligence, automobiles, medical devices, industrial automation and other industries with its long life, low noise and high torque. Because of its different specifications and types, it is very important to choose the brushless DC motor to meet the product performance requirements. Here are some principles for selecting brushless motors. 1. Specification selection In the case of adjustable power supply voltage, the specification of DC brushless motor with torque and speed close to the corresponding rating of the product can be selected according to actual needs, and the required speed can be obtained by changing the voltage; When the power supply voltage is fixed, if there is no suitable brushless DC motor available, the appropriate specification can be selected according to the torque first, and the voltage and speed of the product can be adjusted appropriately. 2. Power selection The maximum output power of the motor is limited. If the power selection of the brushless motor is too small, the motor will be overloaded if the load exceeds the rated output power. When the motor is overloaded, there will be phenomena such as motor heating, vibration, speed drop, abnormal sound, etc. When it is overloaded seriously, the motor will be burned. Excessive power will lead to economic waste. Therefore, it is very important to choose the power of the motor reasonably. 3. Type selection should give priority to ferrite permanent magnet DC motor with high efficiency, low price and low temperature rise. Only when the performance requirements are strict, the volume is small and the ambient temperature is high, the Al-Ni-Co permanent magnet DC motor or rare earth permanent magnet DC motor should be considered. Different specifications of brushless DC motors have different characteristics and advantages, so it is necessary to master the selection principles and methods, so as to make the products achieve the best performance, high efficiency, energy saving and environmental protection.
