When the power supply voltage is adjustable, according to the actual needs, select the DC motor specifications whose torque and speed are close to the corresponding rated values of the product. By changing the voltage, obtain the required rotation speed; if the power supply voltage is fixed, if there is no proper DC brushless When the motor is available for selection, the appropriate specification can be selected according to the torque, 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 DC motor is too small, the motor overload will occur if the load exceeds the rated output power, and the motor will generate heat, vibration, speed drop, and abnormal sound when overloaded. In severe overload, the motor will be burned. If the power is too large, it will cause economic waste. Therefore, it is very important to choose the power of the motor rationally.
3, type selection
It is preferable to use ferrite permanent magnet DC motors with high efficiency, low price, and low temperature rise. Aluminium-nickel-cobalt permanent magnet DC motor or rare earth permanent magnet DC motor is considered only when the performance requirements are strict, the volume is small, and the ambient temperature is high.