Study On Model Design Method Of Multilevel Inverter System

Multi-level inverter system with low harmonic content and excellentelectromagnetic compatibility is concerned widely.Becauseofthecomplextraditionalwayofembeddeddevelopmentcircuit,softwarecodenumbershowsrapidgrowthtrend,multi-levelinvertersystemwith a little more switcheshasmanydisadvantages. Embedded system design method based on modelreferencedesignsaccomplishfive-levelinvertercontrolsystemnot only solve theproblem ofthe currentembedded development,also provide anew pattern fortheresearchof power electronics.On the base of a large number of domestic and foreign literature,expoundModel-Based Design method in detail andverified with multilevel invertersystem.Three-phase five-level cascade inverter system isselected as the researchobject, using MATLAB as software design tools,analysis of the principle of carrierphase shift PWM control method, constructthe mathematical model of control partinsimulink platform and determine its validity through a series of test and verification.Add and configure the peripheral units of processor F28335, connect to the debugger(CCS) and download to the target processors automatically, thenthe generated signalinto hardware circuit can be obtained ideal waveform.Through the experiment completed the open-loop control of three-phasefive-level, continue to modify the model and improve the hardware circuit canoptimize the design of inverter system, complete the function of regulating voltage.The experimental results indicate the efficiency and accuracy of model design, thisnew development mode can be introduced to the research and design of powerelectronicdevices，also can be widely applied to other related research areas.