Can ordinary motors be regulated by frequency converters?

Ordinary three-phase asynchronous motor.

It is possible to adjust the speed.

If it is a squirrel cage motor, only use the inverter to regulate the speed, and if it is a winding motor, there are many ways to regulate the speed

1.The frequency converter is used to change the frequency of the power supply to regulate the speed, the speed regulation range is large, the stability and smoothness are good, and the mechanical characteristics are hard. That is, with the added rated load, the speed drops less. It belongs to stepless speed regulation. It is suitable for most squirrel cage asynchronous motors and wired asynchronous motors.

2.Change the number of pole pairs.

Speed regulation, which belongs to step-by-step speed regulation, has poor smoothness of speed regulation, and is generally used in metal cutting machine tools.

3.Change the slip rate to adjust the speed.

1) Rotor loop string resistance: used for AC wound asynchronous motor. The speed regulation range is small, the resistance consumes power, and the motor efficiency is low. Generally used for cranes.

2) Change the power supply voltage speed regulation, the speed regulation range is small, and the torque drops greatly with the voltage drop, three-phase motor.

Generally, no. It is used for single-phase motor speed regulation, such as fans.

3) Cascade speed regulation, the essence is to introduce additional electromotive force into the rotor.

Change its size to regulate the speed. It is also only used for wound motors, but the efficiency is improved.

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Generally speaking, ordinary motors can use frequency converters, however, the frequency difference of general matching is not too large.

The inverter is used to change the power frequency of the motor to change the speed of the motor. Therefore, the inverter can be connected to an ordinary motor, and it is also the case at the beginning of the application of the inverter to the motor. However, with the development, some manufacturers have installed the inverter with the ordinary motor, but the principle remains the same.

It can be used, but pay attention to the heat dissipation of the motor when running at low frequency, if the heat dissipation is not solved for too long at low speed, it will affect the life of the motor.

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If the motor needs to work at low frequency for a long time, it is best to install a separate fan behind it to help dissipate heat, because the coaxial fan with the motor speed is too low to dissipate heat enough, which is easy to cause high temperature of the motor!

Of course, there is a problem to pay attention to, low frequency and long time operation to solve the motor fan heat.

Yes, it is recommended to install a fan.

This kind of ordinary TV series can also use frequency converters, it depends on how you are, do you need it? According to the actual situation.

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The speed can be adjusted with a frequency converter, and the motor speed is only related to the number of poles and frequency. If the frequency is too high, the temperature of the motor will increase, the vibration will increase, and the bearing load will increase, which will affect the life of the motor.

The rectified DC voltage of the rectifier contains a pulsating voltage that is 6 times the frequency of the power supply, and the pulsating current generated by the inverter also causes the DC voltage to fluctuate. In order to suppress voltage fluctuations, inductors and capacitors are used to absorb pulsating voltages (currents). If the capacity of the device is small, if there is a margin between the power supply and the main circuit components, a simple flat-wave circuit can be used without inductance.