A Novel Approach for Single-Source 3-Phase 7-level Boost Inverter

Abstract

In this article, a 3-phase inverter with a voltage gain of three demonstrated via the toggle capacitor concept.It synthesizes a line voltage waveform with seven levels. The most salient feature of this topology is that a single input DC locate is necessaryfor the 3-phase implementation.Each branch of the proposed topology requires eight power electronics switches and 2condenser. The opposite of the current reach their highest across the energyoutlet is equal to the value of the input DC voltage. The capacitors are all self-balanced at all modulation indices. The proposed approach minimizes the cost function to 5.429, as the proposed topology exhibits better topological characteristics mainlythe boosting-factor, overall-voltage and component..Topology with similar features, however, has a const function of 7.333. In addition, the suggested topology is highly modular, so the amount of pole energyscalescould be increased by further adding switched capacitors, and the same arm structures can be used for all phases. However, an important limitation is that the pole voltage is unipolar, and therefore redundant states in phase are not available, although they are readily available in line voltage. The 7-level topology and modulation procedure are verified by result discussion, which represents that with a DC energy of 100 V, a 3-phase voltage with about 300 V could be obtained in equal steps of 100 V, while the pole voltage is a unipolar 4-level peak value 300V in equal steps of 100V.