The PDB series programming power supply has been successfully applied to the accelerator system. The accelerator system is powered by the low-voltage distribution cabinet. The 380V power supply enters the programming power supply after passing through the circuit breaker. The programming power output directly supplies power to the electromagnet. As the core regulating unit of the accelerator system, the programming power supply receives the control signal from the upper computer system. Through the high-precision and high stability current detection element, it can effectively and accurately control the output current and provide an excitation source for the electromagnet to form a stable magnetic field. It has the characteristics of high adjustment accuracy, good stability and abundant peripheral interfaces.