Abstract The article discusses the use of multilevel inverters that rely on switched capac-itors to quadruple the gain of DC to AC power converters. These inverters typically face a trade-off between the number of switches and the voltage stress of the switches. The article proposes a solution to this problem by introducing a new nine-level switched-capacitor-based quadruple boost inverter (NSQBI) that reduces the voltage stress and number of components required. The NSQBI achieves a quadrupling of boost by using six-power switches and a single diode, along with a half-bridge circuit. Despite the increased maximum output voltage, the voltage stress on power switches are minimized because all switches and a diode can be connected to any of the reduced voltage capacitors. This allows for the use of reduced voltage power components, reducing total power dissipation. The article provides theoretical analysis, computations, and design requirements for the NSQBI and compares it to previous inverters. The benefits of the NSQBI are confirmed by simulations and tests on a 0.45 kW inverter prototype.
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Murugan et al. (2024) studied this question.
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