Investigation On Digital Control Technology Of Single-phase Inverter Experiment System Based On DSP

Digital controlled circuits with the merits of simple structure and high reliability tend to realize the advanced control arithmetic and the monitor and updates of the system. The development orientation of Modern power electronics is the digital control technique, so the instructional mode of experiment should follow the orientation. Nowadays majorities of the experiment equipment of single-phase inverters adopt analog technique and open-loop control, which can not satisfy the demands of the synthetical and innovational experiment instruction. This paper presents an experiment system of single-phase inverter based on DSP control.This paper mainly presents the general design of a experiment system of single-phase inverter based on the DSP control. Waveform modulation technology, closed-loop control strategy, digital control features and present state of experiment system of single-phase inverter are outlined firstly. Then based on the analysis of demands of single-phase inverter with digital control, this paper proposes the design principle of the experiment system, chooses the platform based on the DSP control, and finishes the system's framed construction and the circuit design. Furthermore, this paper gives the parameters design of open-loop control with SPWM and single-loop PID voltage control and voltage and current double closed-loop control. At last , the experiment results are presented.