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The neutral point (NP) potential self-balancing of five-level full bridge inverters with conventional modulation strategy is related to the modulation index. Both the voltages of two split-capacitors should be sampled and controlled, when the inverter operates with the low modulation index. Therefore, an improved modulation strategy is proposed to realize the NP potential self-balancing for five-level...
The unipolar sinusoidal pulsewidth modulation (SPWM) full-bridge transformerless photovoltaic inverter with ac bypass brings low conduction loss and low leakage current. In order to better eliminate the leakage current induced by the common-mode voltage, the clamping technology can be adopted to hold the common-mode voltage on a constant value in the freewheeling period. A full-bridge inverter topology...
A T-type three-level inverter topology with RB-IGBT is researched. The operation modes and modulation strategy is analyzed. The power loss of T-type inverter with RB-IGBT and normal IGBT is calculated and compared. Experimental results show that T-type inverter with RB-IGBT has better efficiency than that of normal IGBT.
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