The RKP6000 series program-controlled variable frequency power supply is made with a microprocessor as the core and high-frequency SPWM method. It uses active components IGBT to sample hardware waveform synthesis and PID control, with stable output waveform and fast response speed. It adopts a power device protection method that combines hardware and software for fast and reliable protection. It has the characteristics of strong load adaptability, good output waveform quality, easy operation, small size, and light weight. It has protection functions such as short circuit, overcurrent, overload, and overheating to ensure reliable operation of the power supply.