Frequency converter is a power electronic device, mainly used to change the supply frequency and voltage of AC motor, so as to control the speed and output power of the motor. Inverter is widely used in various industrial automation control systems, such as fan, pump, compressor, conveyor belt and other equipment speed control. At the same time, the inverter can also improve the power factor of the power grid, reduce power loss, and improve the efficiency of power use.
The working principle of the inverter is mainly through the fast switching control of semiconductor switching elements (such as IGBT, MOSFET, etc.) to convert the fixed frequency alternating current to the arbitrary frequency alternating current required by the user. The inverter is usually composed of a rectifier, a filter, an inverter and a control circuit.
When choosing a frequency converter, it is necessary to consider the rated power, rated voltage, rated current, rated frequency and other factors of the motor, as well as the working environment, control accuracy, reliability and other requirements of the system. At the same time, it is also necessary to consider the price, brand, after-sales service and other factors of the inverter.
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