This work proposes a comparative analysis of sinusoidal and third harmonic injected reference signal modulation accompany with level-shifted PWM technique named as phase disposition (LSPD), opposition (LSPOD), alternate (LSAPOD) phase-shifted technique. Switching pulses from both have been fed into three eleven level cascaded H-bridge multilevel inverter (CHBMLI) on resistive-inductive load the...

This paper presents an output feedback LPV gain-scheduling control design for a class of PSPWM full-bridge power converters. The design starts with an averaged model of the converter with adequate complexity. One main contribution of this work is to demonstrate how to reformulate the averaged model into an LPV one. A gain-scheduling controller can then be synthesized taking advantage of the des...

ABSTRACT A voltage source inverter is commonly used to supply a three-phase induction motor with variable frequency and variable voltage for variable speed applications. A suitable pulse width modulation (PWM) technique is employed to obtain the required output voltage in the line side of the inverter. The different methods for PWM generation can be broadly classified into Triangle comparison b...

this paper presents a grid connected photovoltaic system, which acts as both power generator and active power filter (apf), based on flying capacitor multicell (fcm) converter. increase in the number of output voltage levels, natural self-balancing of flying capacitors and dc link voltage and lower power rating of components are the main futures of fcm converter compared with conventional multi...

In high power high voltage application BLDC motor are widely used because of high efficiency, simple construction, low cost less maintenance and high torque or high output power per unit volume. For driving the BLDC motor we required inverter. PWM inverter which gives good performance. In two level inverter there is a problem of harmonics distortion, lower electromagnetic interference, high DC ...

Medium voltage hybrid bridge multilevel converter (MMC) usually has a lower number of links. Therefore, the traditional Nearest Level Modulation (NLM) method problems low equivalent switching frequency and poor output quality. And Carrier Phase-shifted Pulse Width (CPS-PWM) modulation such as difficulty in control, redundant configuration, large amount calculation. In response to above problems...

This the~is explores the design of front-end converters in the 1 kW to 1.5 kW power range to be used in distributed power supply systems. The intent is to maximize the efficiency, power density and the stability of the overall system. The topologies used for these front-end converters are square-wave bridges switching a.t frequencies in the sub-MHz range. The thesis starts by reviewing the swit...

Multilevel cascaded and hybrid inverter systems conventionally use three level bipolar PWM for each individual inverter, with their carriers phase shifted to achieve maximum harmonic cancellation within each phase leg. This has been shown to give a harmonic performance equivalent to APOD modulation of a NPC multilevel inverter, when the switching frequencies are scaled to achieve the same numbe...

This paper presents different types of bipolar Pulse Width Modulation (PWM) strategies for the chosen Cascaded MultiLevel Inverter (CMLI). The main purpose of MLI is to use power semiconductor devices of lower voltage ratings to realize high voltage levels at inverter output. Due to their ability to obtain refined output voltage waveforms, reduced Total Harmonic Distortion (THD) and reduced EMI...