How to converter playing roles in VFD ?

 The converter in an inverter plays a crucial role in converting the DC power from the power source into AC power. There are two main types of converters used in inverters:

1. Rectifier: The rectifier is the component responsible for converting incoming AC power into DC power. In grid-tied inverters or hybrid systems, where AC power is available from the electrical grid or renewable sources like solar panels or wind turbines, the rectifier converts this AC power into DC power. This DC power is then fed into the inverter's DC bus.

2. Inverter Circuit: The inverter circuit is the heart of the inverter. It takes the DC power from the rectifier or the DC power source directly and converts it into AC power. This process involves switching the DC power on and off rapidly to create an alternating current waveform. The inverter circuit typically uses semiconductor devices such as transistors, insulated gate bipolar transistors (IGBTs), or MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) to switch the DC power and generate the desired AC output.

In some inverters, especially in grid-tied systems, the rectifier and the inverter circuit may be integrated into a single unit, known as a grid-tie inverter. These inverters perform the dual function of converting DC power from renewable sources into AC power for use in the electrical grid and converting AC power from the grid into DC power for consumption by local loads or storage in batteries.