Modification of cascaded H-bridge multilevel inverter to increase output voltage level with a single DC voltage source

2014 ◽  
Author(s):  
Jin-sung Choi ◽  
Feel-Soon Kang
Keyword(s):  
Output Voltage ◽  
Multilevel Inverter ◽  
Voltage Source ◽  
Voltage Level ◽  
Dc Voltage

scholarly journals A 13-Level Asymmetrical Cascaded Inverter for Photovoltaic System With DC-DC Flyback Converter

2019 ◽  
Vol 8 (3) ◽  
pp. 6584-6591
Keyword(s):  
Output Voltage ◽  
Harmonic Distortion ◽  
Photovoltaic Cell ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Solar Irradiation ◽  
Voltage Source ◽  
Asymmetric Mode ◽  
Dc Voltage ◽  
Point Tracking

In recent days, multilevel inverter has widely been used for high power application. This may be due to the reduction of total harmonic distortion (THD) of the output voltage level and having low blocking voltages of switches. In the existing system, DC voltage source which is maintained constant is given as the input to the inverters which contains the series connection of fundamental block and is analyzed in symmetric and asymmetric mode of operation to produce various voltage levels. The proposed approach replaces the DC voltage source to the Photovoltaic (PV) cell has been used which has variations in the output voltage side depends on the solar irradiation level. This Photovoltaic cell uses Maximum Power Point Tracking (MPPT) algorithm to produce required voltage. As the input to the multilevel inverter (MLI) has to be maintained constant a fly back forward converter has been used in between the Photovoltaic cell and the multilevel inverter, so that the required multiple constant output voltage has been obtained on the output of the converter. Using the output of the converter 13 output voltage levels can be obtained from the multilevel inverter. The performance of the proposed system is verified by simulation through MATLAB/Simulink environment

scholarly journals Three-Phase Six-Level Multilevel Voltage Source Inverter: Modeling and Experimental Validation

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1133
Author(s):  
Sheikh Tanzim Meraj ◽  
Nor Zaihar Yahaya ◽  
Kamrul Hasan ◽  
Molla Shahadat Hossain Lipu ◽  
Ammar Masaoud ◽  
...  
Keyword(s):  
Output Voltage ◽  
Experimental Validation ◽  
High Efficiency ◽  
Multilevel Inverter ◽  
Voltage Source ◽  
Voltage Step ◽  
Current Harmonics ◽  
Dc Voltage ◽  
Three Phase ◽  
Vector Modulation

This research proposes a three-phase six-level multilevel inverter depending on twelve-switch three-phase Bridge and multilevel DC-link. The proposed architecture increases the number of voltage levels with less power components than conventional inverters such as the flying capacitor, cascaded H-bridge, diode-clamped and other recently established multilevel inverter topologies. The multilevel DC-link circuit is constructed by connecting three distinct DC voltage supplies, such as single DC supply, half-bridge and full-bridge cells. The purpose of both full-bridge and half-bridge cells is to provide a variable DC voltage with a common voltage step to the three-phase bridge’s mid-point. A vector modulation technique is also employed to achieve the desired output voltage waveforms. The proposed inverter can operate as a six-level or two-level inverter, depending on the magnitude of the modulation indexes. To guarantee the feasibility of the proposed configuration, the proposed inverter’s prototype is developed, and the experimental results are provided. The proposed inverter showed good performance with high efficiency of 97.59% following the IEEE 1547 standard. The current harmonics of the proposed inverter was also minimized to only 5.8%.

A Simple Control Method of Output Voltage for Three-Phase Multilevel Inverter Considering the DC Voltage Fluctuation

2008 ◽  
Vol 128 (3) ◽  
pp. 244-250
Author(s):  
Kenji Amei ◽  
Kenji Teshima ◽  
Youhei Tanizaki ◽  
Takahisa Ohji ◽  
Masaaki Sakui
Keyword(s):  
Output Voltage ◽  
Control Method ◽  
Multilevel Inverter ◽  
Voltage Fluctuation ◽  
Dc Voltage ◽  
Three Phase

scholarly journals An Asymmetrical Step-Up Multilevel Inverter Based on Switched-Capacitor Network

2019 ◽  
Vol 11 (12) ◽  
pp. 3453 ◽  
Author(s):  
Taghvaie ◽  
Alijani ◽  
Adabi ◽  
Rezanejad ◽  
Adabi ◽  
...  
Keyword(s):  
Input Voltage ◽  
Multilevel Inverter ◽  
Voltage Source ◽  
Switched Capacitor ◽  
Voltage Waveform ◽  
Dc Voltage ◽  
Magnetic Elements ◽  
High Level ◽  
Control Implementation

This paper presents a transformerless step-up multilevel inverter based on a switched-capacitor structure. One of the main contributions of the proposed topology is replacing the separated DC voltage source with capacitors which are charged at predetermined time intervals. Therefore, a high-level staircase voltage waveform can be achieved by discharging some of these capacitors on the load. The other contribution of the proposed structure is to eliminate the magnetic elements which traditionally boost the input DC voltage. In addition, asymmetrical or unequal amounts of capacitor voltages create more voltage levels, which enable voltage level increments without increasing the number of semiconductor devices. This paper introduces a self-balanced boost Switched-Capacitors Multilevel Inverter (SCMLI) which is able to create a nearly sinusoidal voltage waveform with a maximum voltage of up to 45 times that of the input voltage DC source. Higher level output voltage levels are also achievable by extending the circuit topology. After determination of the switching angles and selecting the proper switching states for each level, an offline NLC method is used for modulation, which eases the control implementation. Analysis, simulation and experiments are carried out for a 91-level inverter (45 levels for positive and negative voltages and one for zero voltage) are presented.

scholarly journals A New Modular Multilevel Inverter Based on Step-Up Switched-Capacitor Modules

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 524 ◽  
Author(s):  
Aryorad Khodaparast ◽  
Erfan Azimi ◽  
Ali Azimi ◽  
M. Ebrahim Adabi ◽  
Jafar Adabi ◽  
...  
Keyword(s):  
Theoretical Investigation ◽  
High Efficiency ◽  
Harmonic Distortion ◽  
Low Frequency ◽  
Multilevel Inverter ◽  
Voltage Source ◽  
Switched Capacitor ◽  
Level Control ◽  
Dc Voltage ◽  
Bipolar Voltage

A new structure of switched capacitor multilevel inverter (SCMLI) capable of voltage boosting and with self-balancing ability is introduced in this article. This advantage is the result of a step by step rise of capacitor voltages in each module, supplied by just one DC voltage source. The proposed topology generates a sinusoidal output waveform with a magnitude several times greater than the input one. Higher output staircase AC voltage is obtained by applying a nearest level control (NLC) modulation technique. The most significant features of this configuration can be mentioned as: fewer semiconductor devices, remarkably low total harmonic distortion (THD), desirable operating under high /low frequency, high efficiency, inherent bipolar voltage production, easy circuit expansion, ease of control and size reduction of the circuit thanks to utilizing neither bulky transformer nor inductor. Moreover, the proposed SCMLI is comprehensively surveyed through theoretical investigation and a comparison of its effectiveness to recent topologies. Eventually, the operating principle of a 25-level prototype of the suggested SCMLI is validated by simulation in the MATLAB SIMULINK environment and experimental results.

A 21-Level Bipolar Single-Phase Modular Multilevel Inverter

2019 ◽  
Vol 29 (01) ◽  
pp. 2050004
Author(s):  
Sidharth Sabyasachi ◽  
Vijay B. Borghate ◽  
Santosh Kumar Maddugari
Keyword(s):  
Electric Vehicle ◽  
High Voltage ◽  
Output Voltage ◽  
Single Phase ◽  
Emergency Services ◽  
Multilevel Inverter ◽  
Experimental Confirmation ◽  
Voltage Source ◽  
Matlab Simulink ◽  
Inverter Topology

This paper presents a module for single-phase multilevel inverter topology. The proposed module generates maximum 21-level bipolar output voltage with asymmetric sources without H-bridge. This results in reduction in filter cost and size. The module can be cascaded for high voltage applications. The same arrangement of voltage source magnitudes in first module is maintained in the remaining cascaded modules. The proposed topology is suitable for the applications like electric vehicle and emergency services like residences and hospitality industries, etc. A set of comparisons between the proposed and recently published topologies are provided to differentiate between them. The topology is simulated and verified in MATLAB/SIMULINK. A hardware prototype is developed in the laboratory for experimental confirmation with various conditions.

A simple method for output voltage control of a three-phase multilevel inverter considering DC voltage fluctuation

2010 ◽  
Vol 170 (3) ◽  
pp. 40-47
Author(s):  
Kenji Amei ◽  
Kenji Teshima ◽  
Youhei Tanizaki ◽  
Takahisa Ohji ◽  
Masaaki Sakui
Keyword(s):  
Output Voltage ◽  
Voltage Control ◽  
Multilevel Inverter ◽  
Voltage Fluctuation ◽  
Simple Method ◽  
Dc Voltage ◽  
Three Phase

Reduced common‐mode voltage operation of a new seven‐level hybrid multilevel inverter topology with a single DC voltage source

2016 ◽  
Vol 9 (3) ◽  
pp. 519-528 ◽  
Author(s):  
Arun Rahul Sanjeevan ◽  
R. Sudharshan Kaarthik ◽  
K. Gopakumar ◽  
P.P. Rajeevan ◽  
Jose I. Leon ◽  
...  
Keyword(s):  
Multilevel Inverter ◽  
Voltage Source ◽  
Common Mode ◽  
Dc Voltage ◽  
Common Mode Voltage ◽  
Inverter Topology
Sign in / Sign up

Export Citation Format

Share Document