Design principle:
The design principle of high-frequency circuit is relatively complex. It is composed of igbt module high-frequency rectifier, battery converter, inverter and bypass. The igbt module uses control to add a gate driver to control its on and off, and power off. The igbt module rectifier controls the switching frequency mostly from a few kilohertz to tens of kilohertz, or even hundreds of kilohertz, much higher than low frequency,so it is called high frequency inverter.
The low-frequency inverter is designed based on the basic principles of traditional analog circuits and consists of a thyristor (SCR) rectifier, an igbt module inverter, a bypass and a low-frequency boost isolation transformer.
Conversion efficiency:
The conversion efficiency of low-frequency inverters is not as high as that of high-frequency inverters. Because high-frequency inverters record complex hardware simulation circuits in microprocessors and control the operation of the inverter in a programmatic manner. In addition to the significant reduction in frequency inverters, the conversion efficiency of high-frequency inverters has also been significantly improved.
Load capacity:
The low frequency of an inverter with the same power will be heavier than that of a high-frequency one. The high-frequency one is smaller and lighter, has higher conversion efficiency and consumes less when idle, but it cannot accept a full-load inductive load, so its overload capability is worse than that of low-frequency inverters.