Inverter accessories, as the name implies, are components of the inverter.
First of all, let's understand the role of the frequency converter: the frequency converter is a power control device that uses the on-off effect of the power semiconductor device to convert the power frequency power supply into another frequency. It can be divided into AC-AC inverter, AC-DC-AC inverter. AC - AC inverter can directly turn alternating current into alternating current with variable frequency and voltage; AC-DC-AC inverter is to first rectify the alternating current into direct current through the rectifier, and then turn this direct current into alternating current with variable frequency and voltage through the inverter.
As one of the most important devices for energy saving, the inverter is commonly used as machinery and equipment for various occasions: such as major industrial mines, coal mines, metallurgy, water supply, elevators, fan pumps. As an industrial equipment will be very wear period, inverter as a more important equipment, if you understand its components, it can be easy to repair and maintain.
Let's look at the general structure first.
Main circuit:
From the input terminal R, S, T, connect R, S, T is generally a rectifier bridge.