Research and Simulation on Voltage-Feedback Type Digital Stabilized Voltage Switching Mode Power Supply

Research was made on the design scheme and basic algorithm of a kind of voltage-feedback type digital stabilized voltage switching mode power supply combining internal resources of single-chip microcomputer with control technique. Take 110V switching mode power supply by electric locomotive as an example, it adopted advanced sensor in sampling data, applied PID control algorithm to adjust voltage and used overcurrent, overheating and short-circuit protection. Design process of control algorithm was given. Eventually the result according to design requirements was achieved by modeling and simulating on the switching mode power supply, meantime the deficiency existed was indicated.