We are committed to creating energy-saving and environment-friendly discount power motors with affordable prices. The mechanical power on the output shaft of the motors and the power of ac motors are related to the voltage, and the frequency will have an impact on the speed and torque.The general inverter in the frequency conversion at the same time, will also change the voltage, otherwise easy to burn out the coil.In addition, the wind volume of the fan is related to the speed, that is to say, if the fan blade is certain, the faster the motor speed, the greater the wind volume.However, for an asynchronous motor, its torque is constant. The motor drives the rotor blades to rotate. When the resistance generated by the rotor blades is equal to the torque of the motor, the motor's speed will stabilize, even if it cannot reach the rated speed of the motor.Then the limit is the torque of the motor, because the torque is too small.
If you want to choose a motor, you must calculate the speed and torque at the rated operating point of the fan. According to the speed and torque, you can calculate the power of a motor.The number of poles of the motor can be selected according to the speed, and then the model of the motor can be determined.
However, the speed of three-phase asynchronous motor is proportional to the voltage. The voltage change causes the speed change, and the speed change causes the power change of the machine. Finally, the change of the mechanical power is reflected in the input power.
