Why use frequency converter to control motor
The motor is an inductive load, which blocks the change of current and will produce a large change of current when starting.
Frequency converter is a power control device that converts power frequency power supply to another frequency by using the on-off function of power semiconductor devices. It is mainly composed of two parts of circuits, one is the main circuit (rectifier module, electrolytic capacitor and inverter module), and the other is the control circuit (switching power supply board, control circuit board).
In order to reduce the starting current of the motor, especially the motor with large power, the larger the power is, the larger the starting current will be. Excessive starting current will bring greater burden to the power supply and distribution network. The frequency converter can solve this starting problem, allowing the motor to start smoothly without causing excessive starting current.
Another function of using frequency converter is to regulate the speed of motor. In many cases, it is necessary to control the speed of motor to obtain better production efficiency. Speed regulation of frequency converter has always been its biggest highlight. Frequency converter controls the speed of motor by changing the frequency of power supply.
