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​The Principle And Characteristics Of Frequency Conversion Speed Regulation

Aug 25, 2020

In recent years, frequency conversion speed regulation technology has been rapidly developed and widely used in various industries. The application of frequency conversion technology is becoming more and more mature, and the improvement of performance and function provides a reliable guarantee for industrial automation.

The principle and characteristics of frequency conversion speed regulation:

According to the rotation principle of the asynchronous motor, the speed formula of the drive motor:

n0 = 60f/ p

It can be seen that the motor speed is proportional to the frequency, and changing the frequency can smoothly change the motor speed. For the inverter, its frequency can be adjusted arbitrarily in the range of 0~400Hz, therefore, the driving motor speed can be adjusted in any range. The frequency conversion speed regulation of the brick-making equipment uses this principle to achieve stepless speed change. The brick-making equipment using frequency conversion control has the following characteristics:

(1) It can easily realize the need of frequency modulation and meet the requirements of production process;

(2) The motor starts smoothly, has a wide range of speed regulation, small mechanical shock, long life and easy maintenance;

(3) The starting current is small and the impact on the grid is small;

(4) High energy transfer efficiency, energy saving, and good economy;

(5) The low temperature rise of the motor is conducive to the long-term stable operation of the motor;

(6) It has multiple perfect protection functions such as overcurrent, overvoltage and undervoltage, to ensure the safe use of the motor;

(7) The inverter has a unique AVR function, even when the grid voltage is low, it can still output enough voltage to drive the motor to work