AS800 series high-voltage inverter is a high-high voltage source-type high-voltage inverter designed and manufactured by Shanghai Sigriner STEP Electric Co., Ltd. which integrates international cutting-edge power electronics technology and vector control technology. It greatly suppresses the Harmonic current is input on the grid side, and the voltage superposition is realized by cascading multi-stage H-bridge power units to obtain a nearly perfect high-voltage sine wave output, which can directly drive a high-voltage motor without installing any filter, and the harmonic index conforms to IECstd 519-1992 (International Electrotechnical Commission) and GB/T 12668.4-2006 (National Standard) requirements for grid harmonics.