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What are the selection criteria for permanent magnet DC motors

Aug 06, 2018

As a user, in the process of selecting a permanent magnet DC motor, we can mainly choose according to three aspects. The first is to determine the type of product. It is recommended to use a ferrite permanent magnet DC motor with high efficiency, low price and low temperature rise. If the performance requirements are strict, the volume is small, and the ambient temperature is high, then an AlNiCo permanent magnet DC motor or a rare earth permanent magnet DC motor should be considered.


The second is to determine the power size reasonably. We know that the power of different permanent magnet DC motors is limited. If the power selection is too small, the motor will overload if the load exceeds the rated output power of the motor. When the overload occurs, the motor will generate heat, vibration, speed drop and abnormal sound. Such phenomena, when severely overloaded, will burn the motor. If the power is too large, it will cause economic waste. Therefore, it is important to choose the power of the motor reasonably.


Finally, it is necessary to choose the appropriate specifications. Under normal circumstances, when selecting the specifications of the permanent magnet DC motor, it can be considered: when the power supply voltage is adjustable, the torque, the speed and the corresponding rating of the product can be selected according to actual needs. , by changing the voltage to get the required speed.