A SINGLE-STAGE DIFFERENTIAL BOOST DC-AC INVERTER WITH SIMPLIFIED CONTROL FOR ON-BOARD ELECTRIC VEHICLE CHARGERS
DOI:
https://doi.org/10.62985/j.huit_ojs.vol26.no2E.425Từ khóa:
DC–AC conversion, Differential boost inverter, Output voltage control, Single-phase inverter, TMS320F28379DTóm tắt
This paper proposes a single-stage DC-AC boost inverter topology for low-voltage DC sources, addressing the limitations of conventional two-stage converters that utilize separate boost and inversion stages, which result in increased complexity, cost, and power losses. The proposed topology achieves simultaneous DC voltage boosting and AC inversion within a single power conversion stage. Detailed analysis of the operating principles and switching states is presented, leading to the development of a comprehensive boost inverter model that incorporates capacitor voltage and inductor current controllers. Performance validation is conducted through simulations under varying input voltage and load conditions, demonstrating robust voltage boosting capability and stable sinusoidal output. Additionally, a low-power hardware prototype is implemented using a TMS320F28379D microcontroller for digital control. Experimental results confirm the inverter's capabilities in voltage boosting, reliable inversion, stable output regulation, and generation of sinusoidal waveforms with low total harmonic distortion.
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