Multilevel inverter is an effective and practical solution for increasing power demand and reducing harmonics of AC waveforms. Such inverters synthesize a desired output voltage from several levels of dc voltages as inputs. This paper analyzes the performance of cascaded five level inverter using hybrid pulse width modulation technique. It has been found that this technique reduces the switchin...

Multilevel inverters are considered as an alternative in the field of high power and medium voltage applications. They can synthesize the desired voltage from several levels of DC voltages. As the number of levels increases the output waveform can be approximated to a sine wave there by reducing the Total Harmonic Distortion. This paper presents the analysis and comparison of conventional three...

In this paper, minimization of the total harmonics (THD) present in the output voltage of multilevel inverters is discussed . In order to reduce the harmonic contents of the inverter's output voltage the best approach is THD minimization. In multilevel inverters, if fundamental frequency switching strategy is considered,(each switch turning on and off once per output cycle), the switching angle...

Multilevel inverter technology has emerged recently as a very important alternative in the area of high power medium-voltage control and also for improving the total harmonic distortion by reducing the harmonics. Generally, the poor quality of voltage and current of a conventional inverter fed induction machine is obtained due to the presence of harmonics and hence there is a significant level ...

The multi level inverters are mainly classified as Diode clamped, Flying capacitor inverter and cascaded multi level inverter. The cascaded H-bridge multilevel control method is very easy when compare to other multilevel inverter because it doesn‟t require any clamping diode and flying capacitor. The simulation had been carried for single leg of three phase three and five level Half-bridge modu...

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 a rather complex control circuitry. This paper proposes a single-phase sevenlevel inverter for grid connected PV systems, with a novel pulse width-modulated (PWM)...

Recently, several numbers of multilevel inverter topologies have been presented that the numbers of power electronic devices have been reduced. This paper presents a novel single-phase topology for multilevel inverter. The proposed topology is based on cascaded connection of basic units. This topology uses minimum lumber of power electronic components such as IGBT, gate driver circuit and antip...

This paper proposes a multi-stage power generation system suitable for renewable energy sources, which is composed of a DC-DC power converter and a three-phase inverter. The DC-DC power converter is a boost converter to convert the output voltage of the DC source into two voltage sources. The DC-DC converter has two switches operates like a continuous conduction mode. The input current of DC-DC...

This paper presents a novel sparse matrix converter configuration that needs no bulky energy storage capacitors or inductors, and employs only unidirectional power semiconductor switches. The source side bridge is switched at the line frequency and therefore, this allows the use of the low speed high power rating switches. This feature and the use of diode-clamped multilevel topology at the out...

Multilevel inverter (MLI) has emerged as a key player in medium and high voltage application due to its tremendous popularity in reduced voltage stress across the power switches and low total harmonic distortion in output waveform. MLI requires large amount of power switches to perform conversion as compared to conventional converter. In MLI, as the number of levels increase number of switches ...