The entire circuit of the variable frequency power supply consists of AC to DC, DC to AC, and filtering sections, thus ensuring its output voltage and current waveforms are pure sine waves, very close to the ideal AC power supply. It can produce any grid voltage and frequency in the world. Aviation Power Supply
The inverter is composed of circuits such as AC-to-DC-to-AC (modulated wave). The standard name for the inverter is variable frequency speed controller. Its output voltage waveform is a pulse square wave, with a high harmonic content. Voltage and frequency change proportionally at the same time, and cannot be adjusted separately, which does not meet the requirements of AC power sources. In principle, it cannot be used as a power supply source and is generally only used for the speed regulation of three-phase asynchronous motors. 400HZ power supply
