scholarly journals Hardware Implementation of 15-Level Cascaded Multilevel Inverter using Pic16f877a

2019 ◽  
Vol 9 (2) ◽  
pp. 4454-4457
Keyword(s):  
Hardware Implementation ◽  
Multilevel Inverter ◽  
Voltage Level ◽  
Dc Voltage ◽  
Multilevel Inverters ◽  
Multilevel Structure ◽  
Simulink Simulation ◽  
Dc Power ◽  
Switching Pattern ◽  
Cascaded Multilevel Inverter

Multilevel inverters can manufacture a high- power, high- voltage inverter with a multilevel structure to control the voltage of the device. A symmetrical multilevel cascaded standard inverter requires 'n' DC sources for' 2n+1' levels that require isolated DC sources for power conversions. The objective of this paper is to increase the number of levels by reducing the number of dc sources. The proposed scheme is to use a multilevel asymmetrical inverter with a separate DC power supply. The analysis is extended to the use of the single DC power source with the remaining ' n-1 ' DC source being a capacitor and simultaneously maintains the capacitor 's DC voltage level and selects a fundamental frequency switching pattern to produce an almost sinusoidal output. Matlab simulink simulation is performed to verify the performance of the Asymmetrical Multilevel Inverter using isolated Dc source. The results of simulation and hardware are presented and discussed in this paper.

Cascading of Diode Clamped Multilevel Inverter Boosters for High Voltage Applications

2013 ◽  
Vol 313-314 ◽  
pp. 876-881
Author(s):  
M.R. Rashmi ◽  
B. Anu
Keyword(s):  
High Voltage ◽  
Power Converters ◽  
Photovoltaic Cells ◽  
Multilevel Inverter ◽  
Power Conditioning ◽  
Dc Voltage ◽  
Multilevel Inverters ◽  
Energy Demands ◽  
Simulation Results ◽  
Cascaded Multilevel Inverter

Nonconventional energy sources are playing important role in meeting current power/energy demands. However these sources cannot provide High voltage/power. For power conditioning and voltage amplification solid state power converters are very much essential. One such approach to obtain high voltage was to use cascaded multilevel inverter but cascaded multilevel inverters require separate DC sources and they cannot be used for regenerative applications. To overcome these limitations, a novel configuration is using diode clamped multilevel inverter is proposed here. . The conditioned DC voltage from photovoltaic cells or fuel cells or batteries is boosted and inverted by means of multistage Multilevel Inverters (MLI). Three different configurations are presented in this paper. From the simulation results of all three configurations, the topology which is found to be better is implemented in the real time. A proto type is developed to boost 40 V input DC to 100 V AC and the experimental results for the same are presented.

A Comparative Studies of Cascaded Multilevel Inverters Having Reduced Number of Switches with R and RL-Load

2017 ◽  
Vol 8 (1) ◽  
pp. 40
Author(s):  
Lipika Nanda ◽  
Abhijit Dasgupta ◽  
Ullash Kumar Rout
Keyword(s):  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Power Sources ◽  
Multilevel Inverters ◽  
Switching Losses ◽  
Dc Power ◽  
Modulation Techniques ◽  
Power Application ◽  
Cascaded Multilevel Inverter

<p>Multilevel inverter offers many benefits for high power application compavered to conventional cascaded Multilevel Inverter topology.This paper presents Symmetric CMLI using variable frequency carrier based pulse width modulation techniques. The proposed topology reduces total harmonic distortion and reduced switching losses for seven level inverter. The simulation study of the proposed topology has been carried out in MATLAB/SIMULINK. The main objective of this paper is to achieve number of levels of MLI with reduced number of switches and DC power sources compared to conventional topology.</p>

Cascaded Multilevel Inverter IM Speed-Sensorless Vector Control System Based on MRAS Theory

2013 ◽  
Vol 344 ◽  
pp. 159-163
Author(s):  
Zhen Jun Lin ◽  
Sheng Hua Huang
Keyword(s):  
Vector Control ◽  
Induction Motor ◽  
Low Voltage ◽  
Multilevel Inverter ◽  
Speed Sensorless ◽  
Multilevel Inverters ◽  
Sensorless Vector Control ◽  
Simulation And Experiment ◽  
Vector Control System ◽  
Cascaded Multilevel Inverter

Cascaded multilevel inverters could realize high-voltage output based on a series connection of power cells which use standard low-voltage component configurations. This characteristic could achieve high-quality output voltage waveforms and input current waveforms. These merits are made for motor control, especially in the field of speed-sensorless vector control of induction motor based on the theory of MRAS. This paper constructs a simulation system with the help of MATLB/SIMULINK and a system combined cascaded H-bridge multilevel inverter with induction motor with the help of DSP and FPGA. The simulation and experiment results verified the superiority of cascaded multilevel inverter applied on the MRAS speed-sensorless vector control of induction motor.

Analysis and Experimentation of a Three Phase Asymmetric Cascaded Multilevel Inverter for Electric Vehicles

2013 ◽  
Vol 768 ◽  
pp. 231-237
Author(s):  
R. Seyezhai ◽  
K. Radha Sree ◽  
K. Sivapathi ◽  
V. Vardhaman
Keyword(s):  
Electric Vehicles ◽  
Carrier Phase ◽  
Multilevel Inverter ◽  
Variable Frequency ◽  
Multilevel Inverters ◽  
Flexible Ac Transmission ◽  
Switching Losses ◽  
Three Phase ◽  
Ac Transmission ◽  
Cascaded Multilevel Inverter

Multilevel inverters have been gaining immense popularity in high power applications such as Electric vehicles, Flexible AC Transmission Systems etc. This paper focuses on an asymmetric cascaded multilevel inverter employing the variable frequency carrier phase shifted PWM technique. The major advantage of this strategy is that it aids in balancing the switch utilization. The proposed strategy was found to have lower THD and switching losses when compared to the conventional strategies. The simulation was performed using MATLAB/Simulink and the results were verified experimentally.

Comparison of Switching Angle Arrangement Techniques in Single-Phase Boost Multilevel Inverter for Low-THD Operation

2015 ◽  
Vol 793 ◽  
pp. 167-171
Author(s):  
Mohd Aizuddin Yusof ◽  
Yee Chyan Tan ◽  
M. Othman ◽  
S.S. Lee ◽  
M.A. Roslan ◽  
...  
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Solar Photovoltaic ◽  
Voltage Waveform ◽  
Voltage Level ◽  
Software Simulation ◽  
Multilevel Inverters ◽  
Simulation Results

Multilevel inverters are one of the preferred inverter choices for solar photovoltaic (PV) applications. While these inverters are capable of producing AC staircase output voltage waveform, the total harmonic distortion (THD) of the output voltage waveform can become worse if the switching angle of each voltage level is not carefully chosen. In this paper, four switching angle arrangement techniques are presented and the switching angles generated by these techniques are applied to a new single-phase boost multilevel (SPBM) inverter. The performance of 3-, 5-, 7-, 9-and 11-level SPBM inverter having four different sets of switching angles derived using the aforementioned techniques have been evaluated and compared using PSIM software. Simulation results show that one of the techniques is able to produce an output voltage waveform with the lowest THD, whilst the other generates an output voltage waveform with the highest fundamental voltage component.

scholarly journals Switched Capacitor Based Cascaded Half-Bridge Multilevel Inverter With Voltage Boosting Feature

2021 ◽  
Vol 6 (1) ◽  
pp. 63-73
Author(s):  
Hossein Khoun-Jahan ◽  
Keyword(s):  
Multilevel Inverter ◽  
Inrush Current ◽  
Switched Capacitor ◽  
Multilevel Inverters ◽  
Main Drawback ◽  
Front End ◽  
Simulation Results ◽  
Resonant Capacitor ◽  
Cascaded Multilevel Inverter ◽  
Inverter Topology

Cascaded multilevel inverter (CMI) topology is prevalent in many applications. However, the CMI requires many switches and isolated dc sources, which is the main drawback of this type of inverter. As a result, the volume, cost and complexity of the CMI topology are increased and the efficiency is deteriorated. This paper thus proposes a switched-capacitor-based multilevel inverter topology with half-bridge cells and only one dc source. Compared to the conventional CMI, the proposed inverter uses almost half the number of switches, while maintaining a boosting capability. Additionally, the main drawback of switched-capacitor multilevel inverters is the capacitor inrush current. This problem is also averted in the proposed topology by using a charging inductor or quasi-resonant capacitor charging with a front-end boost converter. Simulation results and lab-scale experimental verifications are provided to validate the feasibility and viability of the proposed inverter topology.

scholarly journals Design of Single Inductor and Two Output DC - DC Converter

2020 ◽  
pp. 54-59
Author(s):  
S. Inbasakaran ◽  
Mahesh. K ◽  
Lithesh. J
Keyword(s):  
Output Voltage ◽  
Input Voltage ◽  
Power Supplies ◽  
Electronic Systems ◽  
Minimum Loss ◽  
Voltage Level ◽  
Dc Voltage ◽  
Electronic Circuitry ◽  
Dc Power ◽  
Common Goals

<p>A DC-DC converter is used to convert from one DC voltage level to another DC voltage level. The output voltage may be increased or decreased when compare to the input voltage based on the circuit topology. DC – DC converters are mainly used as a regulated and isolated power supplies in many applications. Regulated dc power supplies are needed for most analog and digital electronic systems. Most power supplies are designed to meet some or all of the following requirements:</p> <p><strong>Regulated output: </strong>The output voltage must be kept constant with respect to the change in output loading.</p> <p><strong>Isolation: </strong>The output may be required to be electrically isolated from the input.</p> <p>In addition to these requirements, common goals are to reduce power supply size and weight and improve their efficiency. A few applications of DC-DC converters are where 5V DC on a personal computer motherboard must be stepped down to 3V, 2V or less for one of the latest CPU chips; where 1.5V from a single cell must be stepped up to 5V or more, to operate electronic circuitry. The main focus in this paper is to generate dc voltage from a one level to other level with minimum loss. The need for such converters has risen due to the fact that transformers are unable to function on dc.</p>

scholarly journals Improved reliable multilevel inverter for renewable energy systems

2019 ◽  
Vol 14 (3) ◽  
pp. 1141
Author(s):  
Sujatha M ◽  
A.K. Parvathy
Keyword(s):  
Renewable Energy ◽  
Simulation Model ◽  
Output Voltage ◽  
Energy Systems ◽  
Multilevel Inverter ◽  
Voltage Level ◽  
Renewable Energy Systems ◽  
Matlab Simulink ◽  
Multilevel Inverters ◽  
Main Drawback

<p>New improved multilevel inverter (MLI) topology for Renewable energy systems is proposed in this paper. Cascaded multilevel inverters (CMLI) produce an output voltage level depending on the number of individual sources connected. The main drawback of CMLI is, as the output voltage level increases in number, the switches used in the device also increases and hence the complexity of the circuit increases. As the number of switches increases, the reliability of the circuit decreases. In this paper a novel MLI topology, which employs lesser number of switches, is proposed. A simulation model of CMLI and the proposed MLI has been built in MATLAB/SIMULINK. The reliability of the CMLI and the new topology MLI is analyzed by using MIL-HDBK-217.  </p>

scholarly journals Multilevel level single phase inverter implementation for reduced harmonic contents

2021 ◽  
Vol 12 (1) ◽  
pp. 314
Author(s):  
Taha Ahmed Hussein
Keyword(s):  
Single Phase ◽  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Switching Losses ◽  
Simulink Simulation ◽  
Harmonic Elimination ◽  
Single Phase Inverter ◽  
System Frequency ◽  
Cascaded Multilevel Inverter ◽  
Electronic Switches

<p>Selective harmonic elimination technique SHE is adopted in this work to reduce the harmonic contents in single phase cascaded multilevel inverter. The firing instants for the electronic switches MOSFETs in the inverter are calculated off line for five level to thirteen level inverter. An Arduino microcontroller is programmed to cope with different topologies of the multilevel inverter. The implemented multi-level (MLI) inverter results are compared with Simulink simulation program and are found very close to each other. SHE technique works at system frequency (50 Hz or 60 Hz) and the switching losses are very small. The sinusoidal pulse width modulation SPWM requires a carrier frequency not less 20 times the system frequency so SHE approach is found to be superior compared with SPWM. Also, SHE technique shows significant reduction in THD as the number of levels increased. Results for the output voltages and currents along with their frequency spectrum are shown and compared with traditional SPWM.</p>

scholarly journals Design of new structure of multilevel inverter based on modified absolute sinusoidal PWM technique

2021 ◽  
Vol 12 (4) ◽  
pp. 2314
Author(s):  
Asef A. Saleh ◽  
Rakan Khalil Antar ◽  
Harith Ahmed Al-Badrani
Keyword(s):  
Output Voltage ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Power Circuit ◽  
Zero Level ◽  
Multilevel Inverters ◽  
Simulink Simulation ◽  
High Output Voltage ◽  
Sinusoidal Pulse Width Modulation

The advantage of multilevel inverters is to produce high output voltage values with distortion as minimum as possible. To reduce total harmonic distortion (THD) and get an output voltage with different step levels using less power electronics switching devices, 15-level inverter is designed in this paper. Single-phase 11-switches with zero-level (ZL) and none-zero-level (NZL) inverter based on modified absolute sinusoidal pulse width modulation (MASPWM) technique is designed, modelled and built by MATLAB/Simulink. Simulation results explained that, multilevel inverter with NZL gives distortion percent less than that with ZL voltage. The THD of the inverter output voltage and current of ZL are 4% and 1%, while with NZL is 3.6% and 0.84%, respectively. These results explain the effectiveness of the suggested power circuit and MASPWM controller to get the required voltage with low THD.

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