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Knowledge Sharing: Introduction to Frequency Converter

Release Date: June 9, 2018

The inverter is mainly composed of rectification (AC to DC), filtering, inverter (DC to AC), braking unit, drive unit, and detection unit micro-processing unit. The inverter relies on the opening and closing of the internal IGBT to adjust the voltage and frequency of the output power, and provides the required power voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation. In addition, the inverter also has many protection functions , Such as overcurrent, overvoltage, overload protection and so on. With the continuous improvement of industrial automation, inverters have also been widely used.

Inverter input phase loss (F20): Generally, the input phase loss of the inverter is not directly measured. It is judged by the ripple of the DC bus voltage. When the inverter load is running, if the inverter input phase loss occurs, the ripple of the DC bus Increase, for the 6-pulse rectification, the load of the other rectifier diode is increased, which may cause damage to the rectifier bridge.