scholarly journals Performance of a Novel Multi Level Inverter based on Modulation Techniques

2019 ◽  
Vol 8 (2) ◽  
pp. 3795-3799
Keyword(s):  
Comparative Study ◽  
Harmonic Spectrum ◽  
Multilevel Inverter ◽  
The Novel ◽  
Control Methods ◽  
Matlab Simulink ◽  
Basic Module ◽  
Modulation Techniques ◽  
Multi Level ◽  
Fft Analysis

The aim of the paper is to introduce a symmetrical multilevel inverter (MLI) with a basic module. This novel MLI have a group of components containing H-bridge which results in reduced device count thereby lowering the losses in the devices when related with other regular and recent MLI. Various control methods are employed to the novel inverter and a comparative study is made. FFT analysis is used and harmonic spectrum is analyzed. The evaluation and functioning of the novel inverter is verified through simulation using MATLAB/Simulink software.

Performance Evaluation of 3Φ Asymmetrical MLI with Reduced Switch Count

2016 ◽  
Vol 3 (3) ◽  
pp. 671
Author(s):  
Chinnapettai Ramalingam Balamurugan ◽  
S.P. Natarajan ◽  
T.S. Anandhi
Keyword(s):  
Performance Evaluation ◽  
High Power ◽  
Output Voltage ◽  
Multilevel Inverter ◽  
Matlab Simulink ◽  
Ac Drives ◽  
Three Phase ◽  
Multi Level ◽  
The Cost ◽  
Switching Strategies

The multi level inverter system is habitually exploited in AC drives, when both reduced harmonic contents and high power are required. In this paper, a new topology for three phase asymmetrical multilevel inverter employing reduced number of switches is introduced. With less number of switches, the cost, space and weight of the circuit are automatically reduced. This paper discusses the new topology, the switching strategies and the operational principles of the chosen inverter. Simulation is carried out using MATLAB-SIMULINK. Various conventional PWM techniques that are appropriate to the chosen circuit such as PDPWM, PODPWM, APODPWM, VFPWM and COPWM are employed in this work. COPWM technique affords the less THD value and also affords a higher fundamental RMS output voltage.

scholarly journals A smart cascaded H-bridge multilevel inverter with an optimized modulation techniques increasing the quality and reducing harmonics

2019 ◽  
Vol 10 (4) ◽  
pp. 1852
Author(s):  
Youssef Babkrani ◽  
Ahmed Naddami ◽  
Mohamed Hilal
Keyword(s):  
Renewable Energy ◽  
Renewable Resources ◽  
Multilevel Inverter ◽  
Renewable Energy Resources ◽  
Minimal Impact ◽  
World Community ◽  
Modulation Techniques ◽  
Multi Level ◽  
Oil Crisis ◽  
The Impact

<span>The world community relied heavily on fossils energies but just after the big oil crisis the use of renewable energy has greatly increased and has become the main interest of many countries for its many advantages such as: minimal impact on the environment, renewable generators requiring less maintenance than traditional ones and it has also a great impact on economy. It is easy to get charmed by the advantages of using the renewable resources but we must also be aware of their disadvantages. One of the major disadvantages is that the renewable energy resources are intermittent and thus they have led scientists to develop new semiconductor power converters among which are the multilevel inverter. In this paper a new smart multi-level inverter is proposed so as to increase its levels according to the user’s needs and also to avoid the impact of shades and the intermittence on photovoltaic panels. We also propose a modification on the multicarrier aiming to reduce the harmonics. This modification introduces a sinusoidal wave compared with trapezoidal multi-carrier to generate the pulses. In order to obtain the line voltages and the total harmonic distortions (THD) MATLAB/SIMULINK is used.</span>

scholarly journals A New Converter Topology Designed for Cascaded H Bridge Fifteen Level Inverter

2019 ◽  
Vol 8 (6S3) ◽  
pp. 792-795
Keyword(s):  
High Power ◽  
Industrial Application ◽  
Harmonic Spectrum ◽  
Multilevel Inverter ◽  
Software Validation ◽  
Multilevel Converters ◽  
Matlab Simulink ◽  
Switching Losses ◽  
Converter Topology ◽  
Simulation Results

Multilevel inverter (MLI) are used in most of the high-power industrial application and it has many benefits, such as lower harmonic spectrum and low-order switching losses, which will reduce the device’s size. A new CHB MLI topology with a tiny number of switches is suggested for this paper. In terms of reduced THD value and worth, this topology is superior to the multilevel converters. With the application of the SPWM method, a 15-level inverter will be simulated and its impact on the harmonic spectrum will be analysed. In MATLAB/SIMULINK software, validation of the suggested topology simulation results were observed.

Comparative study of attitude control methods based on Euler angles, quaternions, angle–axis pairs and orientation matrices

2018 ◽  
Vol 41 (5) ◽  
pp. 1189-1206 ◽  
Author(s):  
M Kemal Ozgoren
Keyword(s):  
Comparative Study ◽  
Attitude Control ◽  
Euler Angle ◽  
Backstepping Control ◽  
Control Law ◽  
The Novel ◽  
Control Methods ◽  
Orientation Error ◽  
Error Matrix ◽  
Error Indicators

This paper presents a comparative study about the attitude control methods based on four commonly used error indicators, namely the triad of 3-2-1 deviational Euler angles, the error quaternion, the deviational angle–axis pair and the orientation error matrix. These error indicators are used here with the same backstepping control law to have a common basis of comparison. This control law makes the controller track a restoring angular velocity generated here specifically for each error indicator. This comparative study shows that all these error indicators can be used satisfactorily even in the critical orientations associated with them by taking special measures. For the deviational Euler angle triad, a critical orientation is a singularity, at which the angles become indefinite. Unless the vehicle is stationary, this indefiniteness is resolved here by applying L’Hopital’s Rule on the angular velocity information. The Euler angle triad has also a multiplicity problem. It is solved here by using the novel criterion of minimal deviation angles. For the other error indicators, a critical orientation is an antipodal orientation, which is opposite to the desired one. In an antipodal orientation, the error quaternion and the deviational angle–axis pair cannot be determined through the customary formulas. They are determined here by using the novel specially introduced formulas. Besides, they may suffer from the unwinding phenomenon in an ordinary orientation. This phenomenon is prevented here by keeping the scalar part of the error quaternion non-negative and the deviation angle between 0° and 180°. For the orientation error matrix, a stationary and undisturbed antipodal orientation is an unstable equilibrium, in which the ordinary backstepping control law becomes ineffective for driving the system into action. This problem is solved here by adding an extra term to the ordinary backstepping control law.

Design of a New Single Phase 7-Level Reduced Switches Count Multilevel Inverter Topology

2021 ◽  
pp. 154-164
Author(s):  
Nikhil Agrawal ◽  
Dev Prakash Chourasia ◽  
Bharat Bhushan Khare
Keyword(s):  
Single Phase ◽  
Multilevel Inverter ◽  
Modulation Index ◽  
Matlab Simulink ◽  
Modulation Techniques ◽  
Inverter Topology

This chapter presents a new single-phase multilevel inverter topology. This topology requires fewer components in comparison to conventional multilevel inverter topology such as diode clamped, flying capacitor, and cascade h-bridge inverter. In this topology, no extra clamping diode and no extra clamping capacitor are required for operation. This chapter also presents the control and modulation techniques. These techniques applied on this proposed MLI topology and simulation result are calculated with the help of MATLAB/SIMULINK software and are compared on the basis of THD with over and under modulation index.

Comparative Study of Three Different Topologies of Five-Level Inverter with SPWM Modulation Technique

2017 ◽  
Vol 8 (4) ◽  
pp. 1612
Author(s):  
Nabil Farah ◽  
Jurifa Bt. Mat Lazi ◽  
MHN Talib
Keyword(s):  
Comparative Study ◽  
High Power ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Matlab Simulink ◽  
Number Of Components ◽  
Switching Losses ◽  
Power Application ◽  
Sinusoidal Pulse Width Modulation

<p>Multilevel Inverter (MLI) has attracted a great attention by different researchers and industries due to its capability in handling high power application and minimizing the harmonics contents in the output. This study propose three different topologies of MLI (5-level) which are Cascaded H-Bridge Multilevel Inverter (CHMLI) ,Diode Clamped Multilevel Inverter and Flying Capacitor Multilevel Inverter (FCMLI) .These three topologies have been modelled in MATLAB/SIMULINK and compared in terms of THD and number of components used. Sinusoidal Pulse Width Modulation is utilized to control both of the topologies with same DC source. The results showed that ,CHMLI is superior compared to DCMLI and FCMLI in which the CHMLI produce 26.29% THD while DCMLI and FCMLI produce 29.14% and 33.53% respectively .Moreover less components and switching losses is obtained when using the CHMLI.</p>

scholarly journals Three Phase Five Level T-Type Multi Level Inverter using Hybrid Sources

2019 ◽  
Vol 8 (11) ◽  
pp. 2663-2668
Keyword(s):  
Wind Energy ◽  
Hybrid System ◽  
Output Voltage ◽  
Multilevel Inverter ◽  
Matlab Simulink ◽  
Switching Losses ◽  
Output Quality ◽  
Three Phase ◽  
Multi Level

This paper presents a 5 level T-type multilevel inverter, to improve the performance of the hybrid system and then improved voltage is injected into the grid. Two three level inverter with common emitter and common collector configurations are combined to obtain a five level inverter. PV and wind energy is used as a source of energy to the five level T-type MLI. It has advantages such as low switching losses, lesser THD, less filter requirement and superior output quality when compared to 3-level T-type MLI. PWM technique is employed to generate output voltage. The Simulation is done using MATLAB Simulink.

Hardware Implementation of Solar Based Boost to SEPIC Converter Fed Nine Level Inverter System

2016 ◽  
Vol 7 (4) ◽  
pp. 1031
Author(s):  
D. Jasmine ◽  
M. Gopinath
Keyword(s):  
High Power ◽  
Hardware Implementation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Experimental Results ◽  
Pv System ◽  
Multi Level ◽  
Simulation Results ◽  
Fft Analysis

Multi level inverters are widely used in high power applications because of low harmonic distortion. This paper deals with the simulation and implementation of PV based boost to SEPIC converter with multilevel inverter. The output of PV system is stepped up using boost to sepic converter and it is converted into AC using a multilevel inverter. The simulation and experimental results with the R load is presented in this paper. The FFT analysis is done and the THD values are compared. Boost to SEPIC converter is proposed to step up the voltage to the required value. The experimental results are compared with the simulation results. The results indicate that nine level inverter system has better performance than seven level inverter system.

scholarly journals THD Analysis of a Seven, Nine, and Eleven Level Cascaded H-Bridge Multilevel Inverter for Different Loads

2020 ◽  
Vol 14 (4) ◽  
pp. 514-523
Author(s):  
Manoj Kumar Sahu ◽  
Madhusmita Biswal ◽  
Jagan Mohana Rao Malla
Keyword(s):  
Harmonic Distortion ◽  
Harmonic Spectrum ◽  
Multilevel Inverter ◽  
Total Harmonic Distortion ◽  
Analytical Analysis ◽  
Matlab Simulink ◽  
Multilevel Inverters ◽  
Proposed Model ◽  
Multicarrier Pwm

A multilevel inverter is implemented for generating the required staircase AC voltage of output from various steps of voltages of DC sources. The multilevel inverter gives a better harmonic spectrum and a compatible quality of output. This article delves into an analytical analysis of the total harmonic distortion (THD) of different multilevel inverters which employ a multicarrier PWM technique. This technique is implemented for operating the switches at their respective angle of conduction. This paper deals with various cascaded H-Bridge multilevel inverters (CMI) with various loads that are modelled by implementing the MATLAB/Simulink platform. The output gives a better result of the proposed model in terms that it is helpful towards reducing the THD and the losses of switching.

scholarly journals FPGA based Implementation of Symmetrical Reduced Switch Multilevel Inverter

2018 ◽  
Vol 6 (1) ◽  
pp. 28
Author(s):  
K. Venkataramanan ◽  
B. Shanthi ◽  
T. S. Sivakumaran
Keyword(s):  
Real Time ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Performance Parameters ◽  
Matlab Simulink ◽  
The Real ◽  
Modulation Techniques ◽  
Switching Strategies

Multilevel inverter has become more popular and attractive for drive applications. Among the various modulation techniques, Carrier based techniques has been commonly used because of their simplicity and flexibility. This paper presents the comparisons of bipolar multicarrier pulse width modulation for the new symmetrical multilevel inverter. The performance parameters of new multilevel inverter were analyzed through various switching strategies. The detailed study has been carried out by MATLAB/SIMULINK. The real time implementation was carried out using FPGA. The results of both simulation and experimentation were compared.

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