PERFORMANCE OF CASCADED MULTILEVEL INVERTER BASED ON SWITCHED CAPACITOR

Electrical engineering

In this project a cascaded multilevel inverter based on switched-capacitor for single phase Induction motor drive has proposed. The proposed topology is mainly focused on low number of switches for drive applications. A novel switched-capacitor cascaded multilevel inverter is proposed in this paper, which is designed by a switched-capacitor frontend and H-Bridge backend. Through the conversion of series and parallel connections, the switched capacitor frontend increases the number of voltage levels. The output harmonics and the component counter can be significantly mitigated by increasing number of voltage levels. However, it is difficult to obtain a high-frequency inverter with both simple circuit topology and straightforward modulation strategy. A novel switched-capacitor cascaded multilevel inverter is proposed in this paper, which is designed by a switched-capacitor frontend and H-Bridge backend. Through the conversion of series and parallel connections, the switched capacitor frontend increases the number of voltage levels. The output harmonics and the component counter can be significantly mitigated by increasing number of voltage levels. A Solar PV has used as input to the proposed system which then converted to AC to feed IM. A new control strategy has proposed based on Multi-carrier PWM technique to control inverter switches. To analyze the proposed system is designed using MATLAB software. The Performance is analyzed interms of THD, line and phase voltages, speed and torque of the machine.

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