N.Kavitha1,
Rathina Prabha2
1PG
student- Department of EEE – Mepco Schlenk Engineering
College, Sivakasi Tamilnadu,
India.
2Professor-
Department of EEE – Mepco Schlenk Engineering College, Sivakasi Tamilnadu,
India.
Multilevel converters offer high
power capability, associated with lower output harmonics and lower commutation
losses. Their main disadvantage is their complexity, requiring a great number
of power devices and passive components, and rather complex control circuitry.
This work reports a new multilevel inverter topology using an H-bridge output
stage with a bidirectional auxiliary switch. The new topology produces a
significant reduction in the number of power devices and capacitors required to
implement a multilevel output. The new topology is used in the design of a
five-level inverter; only five controlled switches, eight diodes, and two
capacitors are required to implement the five-level inverter using the proposed
topology. The new topology achieves a 37.5% reduction in the number of main
power switches. Additionally, the dedicated modulator circuit required for
multilevel inverter operation is implemented using a PIC microcontroller,
reducing overall system cost and complexity.
