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Single-Phase Step-Up Five-Level Inverter with Phase-Shifted Pulse Width Modulation
Jianfei ChenĘ”, Caisheng Wang** and Jian Li*
Abstract A single-phase step-up five-level inverter topology with a new phase-shifted pulse width modulation (PS-PWM) strategy is proposed in this paper. When compared with conventional single-phase five-level inverter topologies, the proposed topology can realize multilevel inversion with a double step-up ratio, a reduced number of switching devices and self-balanced capacitor voltages. When compared with the conventional PS-PWM strategy, the new PS-PWM strategy can be implemented with one carrier reduced, which makes it much easier to implement in a digital signal processor (DSP) system. Experimental results have been presented to verify the effectiveness of the proposed inverter and the PS-PWM strategy.
Keyword single-phase, five-level, step-up, self-balance, PS-PWM
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