Study On High-Powered Inverter

In this dissertation, a strong emphasis is paid on the study of maincircuit, control strategy, resisting fulx imbalance in the inverter transformer and so on. At the begin of the dissertation, control strategy is analysed for improving performances of the interver in dynamic, steady-state and minishing harmonious component of the output voltage.Firstly, the theory of the voltage differential multiloop feedback strategy is analysed . Then a lot of simulation and comparision reaserch validate the excellent performances of the interver in dynamic, steady-state and minishing harmonious component of the output voltage.A particular study is paid on the deferent filter of the inverter.A segregative filter is adopted. Firstly, work out the filter parameter on the condition that ensures the stability.of the filter.Then modify the configuration and parameter on the idea of the controllability damp resonance. Simulations validate the good qualities in ensuring the stability.of the inverter when load is changed and minishing harmonious component of the output voltage.In the dissertation, particulatr designs are made on transformer, software and hardware of controlling system and other accessorial circuits.A 5kW, 400Hz interver is designed as a practical illustration. TMS320F240 is adopted in controlling system.F240 is designed by TI crop, for the control.A digital PI voltage integral fulx imbalance control is proposed for eliminating fulx imbalance in the interver transformer. By measuring the change of primary voltage of the transformer in several periods, PI controller adjusts the width of pulse so that flux imbalance of the transformer is limited in a reasonable scope.