Compact three-phase multilevel inverter with boosting capability for low-power three-phase induction motor drive

This paper proposes a step-up three-phase multilevel inverter based on switched capacitor (SC) cells. The prominent features of this inverter are the reduction of the number of components (such as switches, capacitors, and sources) and the ability to boost the voltage. Also, the self-voltage balancing of the capacitors of this inverter is one of the other features of this inverter. The level-shifted pulse width modulation (LS-PWM) method has been used for switching, making the output currents' total harmonic distortion (THD) low. The article has presented the experimental results of this inverter with a three-phase induction motor with a power of 1.1 kW as a load. This paper proposes a step-up three-phase multilevel inverter based on switched capacitor cells. The prominent features of this inverter are the reduction of the number of components (such as switches, capacitors, and sources) and the ability to boost the voltage. Also, the self-voltage balancing of the capacitors of this inverter is one of the other features of this inverter. The level-shifted pulse width modulation method has been used for switching, making the output currents' total harmonic distortion low.image

Automated summary

This paper proposes a step-up three-phase multilevel inverter based on switched capacitor cells, which reduces the number of components and can boost the voltage. The inverter also features self-voltage balancing of the capacitors and low total harmonic distortion due to the use of level-shifted pulse width modulation for switching. Experimental results with a three-phase induction motor as a load are presented.