What is variable frequency motor?
The working principle
Three-phase symmetrical winding, through the three-phase symmetrical alternating current, will generate a rotating magnetic field in space, this magnetic field cuts the rotor conductor, will generate induced electromotive force and induced current in the rotor, and the speed is lower than the synchronous speed and rotate in the same direction as the synchronous speed. Variable frequency motor is to change the speed of the motor by changing the frequency of the input three-phase alternating current, frequency conversion is used to speed regulation.
Advantages
1, high-speed operation, good heat dissipation, so it can achieve high-speed or low-speed long-term operation.
2, with a wide range of constant torque and power speed regulation characteristics, smooth speed regulation, no torque ripple.
3, with all kinds of inverter have good parameter matching, with vector control, can achieve zero speed full torque, low frequency large torque and high precision speed control, position control and fast dynamic response control.
4, with the start function.
5, electromagnetic design, reduce the stator and rotor resistance.
6, adapt to the frequent speed change under different working conditions.
7. Energy saving to a certain extent.
Scope of application
Variable frequency motor is the most common type of motor in the washing machine industry. Variable frequency speed regulation has become the mainstream speed regulation scheme and can be widely used in all walks of life. Especially with the increasingly extensive application of frequency converters in the field of industrial control, the use of frequency conversion motors is also increasingly widespread, and the basic use of frequency converters will be used in the current place.
