VFP-S Series Single Phase Variable Frequency AC Power Supply Overview The VFP-S series Variable AC power supplies are high precision, high efficiency, low THD AC Variable Frequency Power Supplies that converts the input mains power through AC→DC→AC conversion, and gives a pure sine wave AC output with adjustable voltage & frequency within a certain range. Also known as Variable Frequency AC Power Supplies. Different from Variac, variable frequency speed controllers and ordinary AC voltage regulators, VFP Variable Frequency power supplies have adjustable output voltage and output frequency, and ensure a stable output voltage and frequency within its full-scale adjustment range with pure sine wave output waveform, which is an ideal Variable Frequency power source for testing. According to the difference in the number of output phases, it can be divided into VFP-S single-phase AC power supplies and VFP-T three-phase AC power supplies. The output power of single-p…