Abstract
Due to the defects of Z-source inverter topology, an intelligent method to control topological structure of Z-source inverter based on ARM was put forward. Firstly, the double Z-source networks were connected in series, and then new topology structure of the series double Z-source inverter was designed. The steady-state working principle of the new topology structure was analyzed. Based on the steady-state working principle, ArmCortex-m3 processor and digital single-cycle control strategy were used to control the straight-through duty ratio, so that the soft start control and the intelligent control of Z-source inverter topology were realized. Simulation results show that the ratio between capacitor voltage and input voltage is low when the straight-through duty ratio is small. When the command value of DC-link voltage is 50 V, its command voltage value can be accurately tracked. Therefore, the proposed method has high control performance.
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