Research On Control Technique For High-frequency Link Inverter Power Supply Based On Pole-Assignment

A voltage-source high-frequency link inverter power supply with single loop PID controller and conventional dual-loop controller usually work not very well. It is dual to the PID controller parameters and the conventional dual-loop controller parameters are not designed very well. The continuous models of the single-phase and three-phase voltage-source high-frequency link inverter power supply are established on uniform state-space theory in the paper. It is designed that the Pole-Assignment PID controller (PAPID) and dual-loop controller on the single-phase voltage-source high-frequency link inverter power supply. It is analyzed that the robustness to the system parameters and the dead zone effect on the PAPID controlled single-phase voltage-source high-frequency link inverter power supply; It is discussed that auto current limiting function on single-phase and three-phase voltage-source high-frequency link inverter power supply dual-loop controller; It is analyzed that the reason for the direct current capacitance voltage deviation on the three-phase voltage-source high-frequency link inverter power supply. It is proposed that the control method of the dual-loop controller with voltage deviation feedforward compensation. The control method can reject the direct current capacitance voltage deviation and prevent the output voltage waveform distortion. The various simulation experiments have been done under the various load conditions with simulation program PSIM. It is shown that the proposed Pole-Assignment PID controller and dual-loop controller can improve the performances of the voltage-source high-frequency link inverter power supply.