Application requirements: The primary consideration is the specific requirements for motor speed, torque and power in practical applications to ensure that the selected motor can meet the requirements of the working condition. 
Efficiency and energy saving: Examine the working efficiency of the motor at various speeds, choose products with high energy efficiency ratio, especially for equipment that runs for a long time, the energy saving effect is particularly critical. 
Cost-benefit analysis: In addition to the initial purchase cost, it is also necessary to evaluate the maintenance cost, service life and potential energy savings benefits, and take a long-term view. 
Control flexibility: According to the need for frequent speed regulation, speed regulation accuracy requirements and other factors, choose the appropriate speed regulation mode. Environmental adaptability: Consider the working environment of the motor, such as temperature, humidity, dust and other factors, choose the appropriate protection level and insulation level.