The variable frequency power supply converts household AC power into AC→DC→AC, outputting a pure sine wave with adjustable frequency and voltage within a certain range. It differs from the variable frequency speed controller used for motor speed control and from the common AC voltage stabilizer. Avionics Power Supply
The characteristics of an ideal AC power source include stable frequency, stable voltage, zero internal resistance, and a pure sinusoidal voltage waveform. Variable frequency power sources are very close to ideal AC power sources, which is why advanced and developed countries are increasingly using variable frequency power sources as standard power supplies to provide excellent power supply environments for electrical appliances, facilitating the objective assessment of their technical performance. 400HZ power source
