The speed regulating motor is a kind of motor that changes the speed of the motor by changing the series, voltage, current, frequency, etc., so that the motor can achieve higher performance.

There are various types of speed regulating motors, among which asynchronous frequency conversion synchronous frequency conversion are two concepts that we often confuse. Today, Xiaobian will give you to distinguish the differences similarities between them.

Asynchronous variable frequency speed regulating motor is derived ordinary asynchronous motor, because to adapt to the characteristics of inverter output power supply, the motor has made great changes in rotor groove, insulation technology, electromagnetic design check so on. Since the slip rate of the asynchronous motor is determined by the manufacturing process of the motor, it is very discrete, the change of the load directly affects the speed of the motor, to accurately control the speed of the motor can only be closed-loop control using the photoelectric encoder, when the precision of the speed is controlled by the pulse number of the encoder, when the multi-machine control, the speed of the motor can be strictly synchronized.

The rotor of synchronous variable frequency speed regulating motor is inlaid with permanent magnet. After the motor is started instantly, the motor is transferred to normal operation, the stator rotating magnetic field drives the rotor inlaid with permanent magnet to run synchronously. At this time, the speed of the motor forms a strict corresponding relationship according to the number of the motor the frequency of the input power of the motor, the speed is affected by load other factors.

Due to the strict correspondence between the speed of the motor the power supply frequency, the speed accuracy of the motor mainly depends on the accuracy of the frequency of the inverter output power supply, the control system is simple, the speed of multiple motors controlled by a frequency converter is consistent with that of multiple motors, the optical encoder is required for closed-loop control. The common point between them is that an independent forced cooling fan is attached to adapt to the efficient heat dissipation of the motor at low speed reduce the wind friction of the motor at high speed.