Research On Three-level SVPWM Inverter Based On DSP

Recently, the research and design of three-level medium voltage frequency inverter has widely become the hotspot in the area of motion control. Three-level inverter makes a high-performance voltage-source-inverter possible. Therefore, it is very important to study and design the three-level inverter both in the theory and in the practical application.In this paper, the principle of three-level inverter is introduced, and the three-level space voltage vector control method is analyzed in detail. The formulas about PWM pulse and the order of switches action are also presented, then give the simulated results.Secondly, the main-circuit of three-level inverter, the drive technology about MOSFET and the control circuits based on DSP2407A are designed. A set of low power three-level inverter is accomplished for the experiments.Finally, software design and how to realize the three-level space voltage vector control method are described. The problem during the design and the experimental results of this equipment are analyzed.