A Segmented Ladder-Structured Multilevel Inverter for Switch Count Remission and Dual-Mode Savvy

2018 ◽  
Vol 27 (14) ◽  
pp. 1850223 ◽  
Author(s):  
G. Chitrakala ◽  
N. Stalin ◽  
V. Mohan
Keyword(s):  
High Power ◽  
Electromagnetic Compatibility ◽  
Harmonic Distortion ◽  
Electric Utility ◽  
Multilevel Inverter ◽  
Heat Sinks ◽  
Switching Losses ◽  
Gate Driver ◽  
Protection Circuits ◽  
Switch Voltage

The multilevel inverter (MLI) has ascertained its gravity in high-power applications for the past three decades through perennial topological modifications from the pristine structure and development of apposite modulation strategies. The benefits, including subtle switch voltage stress, reduced output voltage total harmonic distortion (THD), tolerable electromagnetic compatibility (EMC), minimal switching losses and [Formula: see text]/[Formula: see text] stress, have prepared it as a very promising candidate in high-power drives and electric utility applications. Meanwhile, MLI has few drawbacks such as higher number of switches with associated peripherals (gate driver circuits, protection circuits and heat sinks) which makes the overall system complex, bulky and costly. There have been many attempts to curb the component count in MLI structure. In this paper, a new topology is developed with a perspective to wane the switch count, which also has the ability of working in both symmetrical and asymmetrical modes. The performance of the proposed segmented ladder-structured MLI (SLSMLI) topology is substantiated with simulation study and experimentation.

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.

Research on the High Frequency Realization of High-Power Inverter

2011 ◽  
Vol 383-390 ◽  
pp. 1077-1083
Author(s):  
Run Hua Liu ◽  
Gang Wang
Keyword(s):  
High Power ◽  
High Frequency ◽  
Output Voltage ◽  
Harmonic Distortion ◽  
Soft Switching ◽  
Multilevel Inverter ◽  
Switching Frequency ◽  
Switching Losses ◽  
Simulation And Experiment

The paper presents the inverter method which based on cascade multilevel inverter and MOSFET-assisted soft-switching of IGBT and modulation strategy against the double requirement of high-power inverter and high frequency. The method can effectively improve the output voltage, reduce harmonic distortion and switching losses, improve the switching frequency and meet the double requirement of the high-power inverter and high frequency. The method proved to be feasible by simulation and experiment.

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 Performance Research of Seven Level Multi-Level Inverter with Reduced Switches using Various PWM Techniques

2019 ◽  
Vol 8 (2S8) ◽  
pp. 1149-1154
Keyword(s):  
High Power ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Switching Topology ◽  
Switching Loss ◽  
Medium Voltage ◽  
Switching Losses ◽  
Multi Level ◽  
Low Efficiency ◽  
Performance Research

A inverter is basically a device that usually converts DC to AC voltage without causing any power loss, applicable to only low to medium voltage applications. But in case of medium to high power applications, it has demerits like high switching losses, reduced cost and low efficiency. To overcome these demerits a Multilevel inverter applicable to high voltage and high-power applications which have low total harmonic distortion (THD) is introduced. This paper is mainly focused on seven-level inverter with five switches and four dc sources. with low total harmonic distortion, less switching loss without adding any complexity to the circuit. The switching topology is integrated with various SPWM techniques like Phase Disposition (PD), Phase Opposition Disposition (POD) and Anti Phase Opposition Disposition (APOD). For better performance of the inverter above three PWM techniques will be compared and analyzed to find the low THD configuration. The simulation of switching topology is done by MATLAB/Simulink.

Single-Phase Multilevel Inverter with Simpler Basic Unit Cells for Photovoltaic Power Generation

2016 ◽  
Vol 7 (4) ◽  
pp. 1233 ◽  
Author(s):  
M. S. Chye ◽  
J. A. Soo ◽  
Y. C. Tan ◽  
M. Aizuddin ◽  
S. Lee ◽  
...  
Keyword(s):  
Power Generation ◽  
Single Phase ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Basic Unit ◽  
Scanning Method ◽  
Power Mosfets ◽  
Switching Losses ◽  
Ac Power ◽  
Unit Cells

This paper presents a single-phase multilevel inverter (MLI) with simpler basic unit cells. The proposed MLI is able to operate in two modes, i.e. charge mode to charge the batteries, and inverter mode to supply AC power to load, and therefore, it is inherently suitable for photovoltaic (PV) power generation applications. The proposed MLI requires lower number of power MOSFETs and gate driver units, which will translate into higher cost saving and better system reliability. The power MOSFETs in the basic unit cells and H-bridge module are switched at near fundamental frequency, i.e. 100 Hz and 50 Hz, respectively, resulting in lower switching losses. For low total harmonic distortion (THD) operation, a deep scanning method is employed to calculate the switching angles of the MLI. The lowest THD obtained is 8.91% at modulation index of 0.82. The performance of the proposed MLI (9-level) has been simulated and evaluated experimentally. The simulation and experimental results are in good agreement and this confirms that the proposed MLI is able to produce an AC output voltage with low THD.

An Improved Symmetric H-Bridge Multilevel Converter Topology; An Attempt to Reduce Power Losses

2018 ◽  
Vol 27 (12) ◽  
pp. 1850187 ◽  
Author(s):  
Rasoul Shalchi Alishah ◽  
Seyed Hossein Hosseini ◽  
Ebrahim Babaei ◽  
Mehran Sabahi ◽  
Jaber Fallah Ardashir
Keyword(s):  
Harmonic Distortion ◽  
Power Losses ◽  
Multilevel Converter ◽  
Switching Losses ◽  
Current Path ◽  
Comparison Results ◽  
Converter Topology ◽  
Gate Driver ◽  
Level Converter ◽  
Symmetric Structures

In this paper, a new structure for multilevel converter based on improved H-bridge converter is presented. The proposed topology is a symmetric topology since the values of all voltage sources are equal. The proposed symmetric structure is a general topology which can be extended for any number of voltage levels at output voltage waveform to obtain the least value of total harmonic distortion (THD). Reduction of switching losses, conduction losses, the number of on-state switches in the current path, utilized DC voltage sources, and gate driver circuits are the main advantages of proposed symmetric structures in comparison with other symmetric topologies. All mathematical analysis on the proposed structure is presented in terms of power losses and maximum blocked voltage by switches. The comparison results with other recently presented symmetric topologies and traditional multilevel converter structures are provided. Experimental results for a thirteen-level converter based on presented structure are provided to validate the practicality of the suggested multilevel structure.

scholarly journals Solar Photovoltaic System-Based Reduced Switch Multilevel Inverter for Improved Power Quality

2022 ◽  
Vol 4 (1) ◽  
pp. 1-13
Author(s):  
Madhu Andela ◽  
Ahmmadhussain Shaik ◽  
Saicharan Beemagoni ◽  
Vishal Kurimilla ◽  
Rajagopal Veramalla ◽  
...  
Keyword(s):  
Output Voltage ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Solar Photovoltaic ◽  
Switching Losses ◽  
Minimum Number ◽  
Multi Level ◽  
Solar Photovoltaic System

This paper deals with a reduced switch multi-level inverter for the solar photovoltaic system-based 127-level multi-level inverter. The proposed technique uses the minimum number of switches to achieve the maximum steps in staircase AC output voltage when compared to the flying capacitor multi-level inverter, cascaded type multilevel inverter and diode clamped multi-level inverter. The use of a minimum number of switches decreases the cost of the system. To eliminate the switching losses, in this topology a square wave switch is used instead of pulse width modulation. Thereby the total harmonic distortion (THD) and harmonics have been reduced in the pulsating AC output voltage waveform. The performance of 127-level MLI is compared with 15 level, 31-level and 63-level multilevel inverters. The outcomes of the solar photovoltaic system-based 127-level multi-level inverter have been simulated in a MATLAB R2009b environment.

scholarly journals Fifteen Level Cross H Bridge Multilevel Inverter Fed PMSM

2019 ◽  
Vol 8 (11) ◽  
pp. 1194-1198 ◽  
Keyword(s):  
Modeling And Simulation ◽  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Harmonic Distortion ◽  
Synchronous Motor ◽  
Multilevel Inverter ◽  
Switching Losses ◽  
Three Phase

Modeling and simulation of fifteen level cross H bridge multilevel(ML) inverter fed three-phase PMSM presented in this paper. In order to overcome the setbacks of an inverter via switching losses and harmonic disturbance, Cross H bridge MLI topology is developed. The number of switches and DC voltages considered in this model are much inferior to other inverter topologies. The topology presented in the paper has better output and lower harmonic distortion (THD). Also, Permanent Magnet Synchronous Motor (PMSM) have significant advantages over other drives. Analysis and Simulations of 5,9 and 15 levelcross H bridge MLI were performed and presented.

scholarly journals An Enhanced H-Bridge Multilevel Inverter with Reduced THD, Conduction, and Switching Losses Using Sinusoidal Tracking Algorithm

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 81 ◽  
Author(s):  
Annamalai Thiruvengadam ◽  
Udhayakumar K
Keyword(s):  
Direct Current ◽  
Output Voltage ◽  
Harmonic Distortion ◽  
Tracking Algorithm ◽  
Multilevel Inverter ◽  
Experimental Result ◽  
Modes Of Operation ◽  
Switching Losses ◽  
Bidirectional Switches ◽  
The Relationship

In this paper, an enhanced H-Bridge multilevel inverter is proposed with the sinusoidal tracking algorithm. The proposed multilevel inverter (MLI) consists of two half H-Bridges cascaded with two unidirectional switches, n direct current (DC) sources, and (n-2) number of bi-directional switches together to form an enhanced H-Bridge (EHB) multilevel inverter. The output voltage levels of an EHB MLI depends on the number of DC sources, the number of bi-directional switches, and the relationship between the magnitude of left-side and right-side DC sources. With the addition of DC sources, bidirectional switches, and employing the sinusoidal tracking algorithm, the performance of the inverter is enhanced with features like an increased number of levels and a reduction in the total harmonic distortion and switching losses. In all the modes of operation of the proposed inverter, only three switches are “ON”, so that conduction losses are less. The proposed enhanced H-Bridge MLI is simulated using MATLAB/Simulink R2017a, and is verified with the experimental result.

Component Count Reduced, Filter-Less H-Bridge Multilevel Inverter with Series and Parallel Connected Switches

2020 ◽  
pp. 2150052
Author(s):  
M Vijayakumar ◽  
S. M. Ramesh
Keyword(s):  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Sine Wave ◽  
Multilevel Inverter ◽  
Level Shift ◽  
Modulation Scheme ◽  
Power Switching ◽  
Power Switches ◽  
Driver Circuit ◽  
Gate Driver

This paper introduces a new premium multilevel inverter (MLI) topology with cascaded H-Bridge and series-parallel connected switches to synthesize the fundamental sine wave with various levels of voltage. The component count is decreased by reducing the number of power switching devices, optoisolators, voltage gate drivers, snubber and filter circuits. The combination of two power switches and a separated DC (SDC) source is called an SDC module. Five SDC modules are required for a 63-level MLI and six SDC modules are required for a 127-level MLI. In this paper, both a 63-level and a 127-level filter-less single-phase MLIs are deliberated. The switches are controlled by employing a newer pulse width modulation (PWM) technique called periodic reduced digital carrier level shift PWM (PRDCLSPWM). As the number of levels increases to a greater extent, the total harmonic distortion diminishes without the need of filter circuit and the performance level also increases. Comparative analysis of proposed 63-level and 127-level MLIs topology with the conventional and modern topologies has been presented in terms of power switches, gate driver circuit requirement, DC voltage sources and THD limits. PRDCLSPWM scheme is derived and analyzed for the proposed 63-level and 127-level MLIs to eliminate low-order and high-order harmonics. Moreover, the performance of the proposed modulation scheme is compared with the most commonly used schemes. The modeling and simulation are done with MATLAB/SIMULINK 2016a.

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