scholarly journals Analysis, design and simulation of digital controlled symmetrical seven levels inverter

2018 ◽  
Vol 69 (3) ◽  
pp. 233-238
Author(s):  
Cajethan M. Nwosu ◽  
Cosmas U. Ogbuka ◽  
Stephen E. Oti
Keyword(s):  
Control Strategy ◽  
Digital Control ◽  
High Efficiency ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Multilevel Inverters ◽  
Switching Losses ◽  
Analysis Design ◽  
Solar Powered ◽  
Inverter Topology

Abstract An analysis, design and simulation of digital controlled symmetrical seven levels inverter is presented in this paper. Against the contemporary use of two asymmetrical DC sources with two H-bridge cells to generate seven levels inverter two DC sources of equal voltage ratings are used through digital control strategy to realize seven levels output voltage. By utilizing limited number of active switching components and avoiding the usual complex PWM control techniques for multilevel inverters by way of digital control strategy, high efficiency multilevel inverter systems due to reduction in total harmonic distortion and switching losses is guaranteed. Owing to symmetry of the H-bridge cells, a simple and single programmed counter built around J-K flip is required irrespective of number of cascades. The analyzed and designed system has been simulated in MATLAB/SIMULINK environment. With an R-L load of 200 Ω and 200 mH, improved total harmonic distortions (THDs) for the inverter current and voltage are 7.59% and 16.89% respectively. The obtained results show that the control-circuit-based multilevel inverter topology is most suited for applications in solar powered inverter systems.

scholarly journals MATLAB/simulink study of multi-level inverter topologies using minimized quantity of switches

2017 ◽  
Vol 7 (1.5) ◽  
pp. 209
Author(s):  
B.Vijaya Krishna ◽  
B. Venkata Prashanth ◽  
P. Sujatha
Keyword(s):  
Harmonic Distortion ◽  
Pulse Generation ◽  
Multilevel Inverter ◽  
Matlab Simulink ◽  
Multilevel Inverters ◽  
Energy Applications ◽  
Electrical Drives ◽  
Switching Losses ◽  
Trigger Circuit ◽  
Inverter Topology

Multilevel Inverters (MLI) have very good features when compared to Inverters. But using more switches in the conventional configuration will reduce its application in a wider range. For that reason a modified 7-level MLI Topology is presented. This new topology consists of less number of switches that can be reduced to the maximum extent and a separate gate trigger circuit. This will reduce the switching losses, reduce the size of the multilevel inverter, and cost of installation. This new topology can be used in Electrical drives and renewable energy applications. Performance of the new MLI is tested via. Total harmonic distortion. This construction structure of this multilevel inverter topology can also be increased for 9-level, 11-level and so on and simulated by the use of MATLAB/SIMULINK. A separate Carrier Based PWM Technique is used for the pulse generation in this configuration.

scholarly journals Comparison of New Multilevel Inverter Topology with Conventional Topologies Used for Induction Heating System

2022 ◽  
Vol 18 (1) ◽  
pp. 48-57
Author(s):  
Aws Al-Jrew ◽  
Jawad Mahmood ◽  
Ramzy Ali
Keyword(s):  
Induction Heating ◽  
Harmonic Distortion ◽  
Heating System ◽  
Multilevel Inverter ◽  
Multilevel Inverters ◽  
Switching Losses ◽  
Power Switches ◽  
The Cost ◽  
Inverter Topology ◽  
Induction Heating System

In this article, a comparison of innovative multilevel inverter topology with standard topologies has been conducted. The proposed single phase five level inverter topology has been used for induction heating system. This suggested design generates five voltage levels with a fewer number of power switches. This reduction in number of switches decreases the switching losses and the number of driving circuits and reduce the complexity of control circuit. It also reduces the cost and size for the filter used. Analysis and comparison has been done among the conventional topologies (neutral clamped and cascade H-bridge multilevel inverters) with the proposed inverter topology. The analysis includes the total harmonic distortion THD, efficiency and overall performance of the inverter systems. The simulation and analysis have been done using MATLAB/ SIMULINK. The results show good performance for the proposed topology in comparison with the conventional topologies.

scholarly journals A Novel Symmetrical Multilevel Inverter with Reduced Switch Count

2020 ◽  
Vol 9 (4) ◽  
pp. 1651-1656
Keyword(s):  
Harmonic Distortion ◽  
Power Converter ◽  
Multilevel Inverter ◽  
Level Shift ◽  
Multilevel Inverters ◽  
Output Waveform ◽  
Switching Losses ◽  
Minimum Number ◽  
Converter Topologies ◽  
Inverter Topology

Multilevel inverters produced lot of interest in academia and industry as they are becoming feasible technology for number of applications. These are considered as the progressing power converter topologies. To generate a quality output waveform with minimum number of switches, reduced switch multilevel inverter topologies has come in focus. This paper introduces a modified symmetrical MLI with reduced component count thereby ensuring the minimum switching losses, reduced total harmonic distortion, Size and installation cost. By proper combination of switches it produces a staircase output waveform with low harmonic distortion. In this paper novel symmetrical inverter topology with reduced component count based on level shift phase opposition and disposition PWM (PODPWM) is proposed. The results are validated using MATLAB/SIMULINK.

Simulation and Analysis of Novel Extendable Multilevel Inverter Topology

2019 ◽  
Vol 28 (06) ◽  
pp. 1950089 ◽  
Author(s):  
V. Thiyagarajan ◽  
P. Somasundaram ◽  
K. Ramash Kumar
Keyword(s):  
Single Phase ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Voltage Waveform ◽  
Dc Voltage ◽  
Switching Losses ◽  
Comparison Results ◽  
Symmetrical Condition ◽  
Gate Driver ◽  
Inverter Topology

Multilevel inverter (MLI) has become more popular in high power, high voltage industries owing to its high quality output voltage waveform. This paper proposes a novel single phase extendable type MLI topology. The term ‘extendable’ is included since the presented topology can be extended with maximum number of dc voltage sources to synthesize larger output levels. This topology can be operated in both symmetrical and asymmetrical conditions. The major advantages of the proposed inverter topology include minimum switching components, reduced gate driver circuits, less harmonic distortion and reduced switching losses. The comparative analysis based on the number of switches, dc voltage sources and conduction switches between the proposed topology and other existing topologies is presented in this paper. The comparison results show that the proposed inverter topology requires fewer components. The performance of the proposed MLI topology has been analyzed in both symmetrical and asymmetrical conditions. The simulation model is developed using MATLAB/SIMULINK software to verify the performance of the proposed inverter topology and also the feasibility of the presented topology during the symmetrical condition has been validated experimentally.

scholarly journals 30 LEVEL MULTILEVEL INVERTER WITH TWO SWITCHED CAPACITOR AND REDUCED NUMBER OF SWITCHES

2019 ◽  
Vol 5 (6) ◽  
pp. 9
Author(s):  
Deepa Raghuwanshi ◽  
Santosh Kumar
Keyword(s):  
Output Voltage ◽  
Control Structure ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Voltage Source ◽  
Resistive Load ◽  
Current Waveform ◽  
Multilevel Inverters ◽  
Bidirectional Switches ◽  
Inverter Topology

Multilevel inverters with a large number of steps can generate high quality voltage waveforms, good enough to be considered as suitable voltage source generators. An advanced multilevel inverter topology is proposed to optimize number of bidirectional switches. In this work the an five-level cascade H-bridge Inverter, which uses multicarrier based control structure and two capacitor with 10 switching MOSFETs topology is being presented. Analysis is done for RL and pure resistive load. The PWM strategy reduces the THD and this strategy enhances the fundamental output voltage. The experimental and simulated results show that total harmonic distortion of output voltage and current waveform shapes are 5.16 % and 5.77% respectively for RL load which are within the acceptable limits.

scholarly journals A New Multilevel Inverter Topology for Grid-Connected Photovoltaic Systems

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Muhammad Bilal Satti ◽  
Ammar Hasan ◽  
Mian Ilyas Ahmad
Keyword(s):  
Solar Energy ◽  
Renewable Energy Sources ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Photovoltaic Systems ◽  
Maximum Power Point ◽  
Multilevel Inverters ◽  
Direct Model ◽  
Power Point ◽  
Inverter Topology

The demand for clean and sustainable energy has spurred research in all forms of renewable energy sources, including solar energy from photovoltaic systems. Grid-connected photovoltaic systems (GCPS) provide an effective solution to integrate solar energy into the existing grid. A key component of the GCPS is the inverter. The inverter can have a significant impact on the overall performance of the GCPS, including maximum power point (MPP) tracking, total harmonic distortion (THD), and efficiency. Multilevel inverters are one of the most promising classes of converters that offer a low THD. In this paper, we propose a new multilevel inverter topology with the motivation to improve all the three aforementioned aspects of performance. The proposed topology is controlled through direct model predictive control (DMPC), which is state of the art in control techniques. We compare the performance of the proposed topology with the topologies reported in literature. The proposed topology offers one of the best efficiency, MPP tracking, and voltage THD.

Investigation and Reliability Analysis of Fifteen Level Asymmetrical Multilevel Inverter Topology using Nearest Level Control Technique with low Component Count

2020 ◽  
Vol 13 ◽  
Author(s):  
Abeera Dutt Roy ◽  
Chandrahasan Umayal
Keyword(s):  
Reliability Analysis ◽  
Electronic Devices ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Control Technique ◽  
Level Control ◽  
Multilevel Inverters ◽  
Different Types ◽  
Performance Abilities ◽  
Inverter Topology

Background:: In multilevel inverters (MLI) as the number of level increases, there is a proportionate increase in the count of the semiconductor devices that are employed. Methods:: An asymmetrical multilevel inverter topology using a bidirectional switch is presented which employs lesser number of power electronic devices to produce fifteen levels at the output voltage. Nearest Level modulation (NLM) technique is used to generate the switching pulses and reliability analysis is performed using Markov reliability methodology. The operating principle of the proposed MLI and its performance abilities is verified through MATLAB/Simulink and a prototype is developed to provide the experimental results. Results:: Total Harmonic Distortion (THD) is computed for proposed MLI for different types of loads in simulation environment as well as in the developed hardware prototype. The fifteen level is achieved by using only 9 switches and 3 DC sources in comparison to the 28 switches and 6 DC sources required by the traditional cascaded H-bridge inverter. Conclusion:: The simulation and hardware results confirm the suitability of the proposed fifteen level MLI as the total component count and the requirement of DC sources reduces considerably.

Multicarrier-SPWM Based Novel 7-Level Inverter Topology with Photovoltaic System

2017 ◽  
Vol 8 (2) ◽  
pp. 826
Author(s):  
R. Palanisamy ◽  
V. Sinmayee ◽  
K. Selvakumar ◽  
K. Vijayakumar
Keyword(s):  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Pv System ◽  
Switching Losses ◽  
Common Mode Voltage ◽  
Voltage Stress ◽  
Inverter Topology ◽  
Sinusoidal Pulse Width Modulation

<p>In this paper a novel 5 switch seven level DC-AC inverter is being proposed. The proposed multilevel inverter uses reduced number of switches as compared to the switches used in the conventional multilevel inverter. The inverter has been designed to generate a 7 level AC output using 5 switches. The voltage stress on each of the switches as well as the switching losses is found to be less, minimized common mode voltage (CMV) level and reduced total harmonic distortion. The proposed 7-level inverter topology has four dc sources, which is energized through the PV system. Proposed inverter is controlled with help of multicarrier sinusoidal pulse width modulation (MCSPWM).The simulation and hardware results were verified using matlab simulink and dspic microcontroller respectively.</p>

scholarly journals Micro controller based asymmetrical multilevel inverter

2019 ◽  
Vol 8 (1) ◽  
pp. 18
Author(s):  
Arun V. ◽  
Prabaharan N.
Keyword(s):  
Real Time ◽  
Output Voltage ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Total Harmonic Distortion ◽  
Switching Scheme ◽  
High Quality ◽  
Multilevel Inverters ◽  
Switching Losses ◽  
Embedded Controller

This paper presents the Asymmetrical multilevel inverter with 1:3 voltage propagation. Switching pulse for Asymmetrical multilevel inverter are generated using embedded controller in m-file using MATLAB. The Asymmetrical multilevel inverter with 1:3 voltage propagation can produce high quality output voltage with less number of switches and voltage sources compare to conventional multilevel inverters. Contrasting other switching schemes, the proposed Switching scheme significantly reduces the Total Harmonic Distortion (THD) and minimize switching losses and reduces the complexity. To evaluate the developed scheme, simulations are carried out through MATLAB and real time implementations are done through microcontroller ARM Cortex™-M0 Core. The simulation and hardware results are presented.

scholarly journals A New Topology on Twenty one level Inverter with Reduced Number of Switches

2019 ◽  
Vol 8 (2) ◽  
pp. 1230-1233
Keyword(s):  
Power Quality ◽  
High Power ◽  
Sine Wave ◽  
Multilevel Inverter ◽  
Multilevel Inverters ◽  
Switching Losses ◽  
Power Capability ◽  
Inverter Topology ◽  
Switching Devices

The Multilevel inverters are known for their high power capability and reliability. They produce the output in the form of staircase waveform. If the number of level increases then almost perfect sine wave can be attained at the output. The increase in number of levels improves the power quality but it also increases the complexity in control and cost, which will increase the switching losses also. Hence there is a need for research in the multilevel inverter topology to have reduced number of switches for increased levels than the conventional and pre-proposed topologies. The purpose of this paper is to design the new topology on multilevel inverter with reduced switching devices

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