Question

How the switches are being reduced in multilevel inverter?

Answer 1

A multilevel inverter is a power electronic interface that synthesizes a desired output voltage from several DC voltages as inputs [1]. The research and development for these types of converters are gaining popularity especially for high power and high voltage applications due to the reduction in THD. Due to this the size of the passive filter will be smaller making the overall system compact. In addition to this, it produces output waveforms with a better harmonic spectrum, hence improved power quality and also has good electro-magnetic compatibility. Conventional multilevel inverters include diode clamped converter [2], flying capacitors [3], cascaded H-bridge [4]. The cascaded H-bridge and the diode clamped are the most popularly hardware implemented topologies at present, especially in the growing technological field of renewable energy.