| Summary: | 碩士 === 龍華科技大學 === 電機工程研究所 === 96 === This study investigates the harmonic analysis and fast-scale instability for two different voltage-controlled single-phase full-bridge bipolar inverter circuits.
In the part of harmonic analysis, the analog control, digital chip control and power circuit are used to obtain the output voltage harmonic spectrum as compared with each other implementation method.
In the part of fast-scale instability phenomena, the state equations of an open loop inverter are first derived. Meanwhile, we construct mathematic and circuit models of the voltage-controlled single-phase full-bridge bipolar inverter by the MATLAB/SIMULINK and IsSpice software. The waveforms of output voltage and inductor current are observed, as the system goes from stable state through period-doubling bifurcation into chaos behavior by varying input voltage, proportional gain and load resistance. Then, the simulated results for fast-scale instability phenomena verify the validity of the mathematic and circuit models we proposed. Finally, the chaos controller of time-delay feedback is proposed, we focus on fast-scale instability phenomena of voltage-controlled single-phase full-bridge inverter. Controlling from chaos state to period-1 state. Simulation results demonstrated the effectiveness of this control method.
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