Three Level Inverter System Design Base On Dsp For High Power Ups

With the coming of information of society, UPS is applied widely in information collection,transmission,disposal,saving etc. And the inverter, the most important component of UPS, take more and more important role in performance and efficiency of UPS. Three-level inverter can reduce transistor's voltage-stress and has low harmonic. And its method is universal as SPWM method. The use of Digital Signal Processor(DSP) controller simplifies the control system, improves the performance of the system, and makes it possible to apply some optimizing algorithm.First, this thesis introduce the classify of UPS and three working modle and the construction of three-level inverter circuitry. Based on this, the thesis introduces modeling of three-level inverter through the analysis of its operation. With comparion with two-level inverter, this thesis give the control method of three-level inverter. It also gives how to design the main circuit, inductor and capacitor, sampling circuit, protection circuit, drive circuit and control circuit. Used the DSP TMS320F2808 , this thesis realizes the SPWM control method.Finally, the experiment results are obtained on the prototype, which prove that theories and analysis are correct.