scholarly journals Design and Implementation of Asymmetrical Multilevel Inverter with Reduced Components and Low Voltage Stress

IEEE Access ◽  
2022 ◽  
pp. 1-1
Author(s):  
Shaik Reddi Khasim ◽  
Dhanamjayulu C
Keyword(s):  
Low Voltage ◽  
Multilevel Inverter ◽  
Design And Implementation ◽  
Voltage Stress

scholarly journals A Robust Multilevel Inverter Topology for Operation under Fault Conditions

Electronics ◽  
2021 ◽  
Vol 10 (24) ◽  
pp. 3099
Author(s):  
Mohd Asif ◽  
Mohd Tariq ◽  
Adil Sarwar ◽  
Md Reyaz Hussan ◽  
Shafiq Ahmad ◽  
...  
Keyword(s):  
Large Scale ◽  
Low Voltage ◽  
Fault Tolerant ◽  
Harmonic Distortion ◽  
Open Circuit ◽  
Multilevel Inverter ◽  
Multilevel Inverters ◽  
Software Packages ◽  
Voltage Stress ◽  
Inverter Topology

Multilevel inverters (MLIs) are used on a large scale because they have low total harmonic distortion (THD) and low voltage stress across the switches, making them ideal for medium- and high-power applications. The authenticity of semiconductor devices is one of the main concerns for these MLIs to operate properly. Due to the large number of switches in multilevel inverters, the possibility of a fault also arises. Hence, a reliable five-level inverter topology with fault-tolerant ability has been proposed. The proposed topology can withstand an open-circuit (OC) fault caused when any single switch fails. In comparison to typical multilevel inverters, the proposed topology is fault-tolerant and reliable. The simulation of the proposed topology is conducted in MATLAB-Simulink and PLECS software packages, and the results obtained for normal pre-fault, during-fault, and after-fault conditions are discussed. Experimental results also prove the proposed cell topology’s robustness and effectiveness in tolerating OC faults across the switches. Furthermore, a thorough comparison is provided to demonstrate the proposed topology’s superiority compared to recently published topologies with fault-tolerant features.

scholarly journals Novel High-Efficiency High Step-Up DC–DC Converter with Soft Switching and Low Component Voltage Stress for Photovoltaic System

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1112
Author(s):  
Yu-En Wu ◽  
Jyun-Wei Wang
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Leakage Inductance ◽  
Power Switch ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Voltage Stress ◽  
Voltage Doubler

This study developed a novel, high-efficiency, high step-up DC–DC converter for photovoltaic (PV) systems. The converter can step-up the low output voltage of PV modules to the voltage level of the inverter and is used to feed into the grid. The converter can achieve a high step-up voltage through its architecture consisting of a three-winding coupled inductor common iron core on the low-voltage side and a half-wave voltage doubler circuit on the high-voltage side. The leakage inductance energy generated by the coupling inductor during the conversion process can be recovered by the capacitor on the low-voltage side to reduce the voltage surge on the power switch, which gives the power switch of the circuit a soft-switching effect. In addition, the half-wave voltage doubler circuit on the high-voltage side can recover the leakage inductance energy of the tertiary side and increase the output voltage. The advantages of the circuit are low loss, high efficiency, high conversion ratio, and low component voltage stress. Finally, a 500-W high step-up converter was experimentally tested to verify the feasibility and practicability of the proposed architecture. The results revealed that the highest efficiency of the circuit is 98%.

An Improved Three-Phase Buck Rectifier with Low Voltage Stress on Switching Devices

2020 ◽  
pp. 1-1
Author(s):  
Qiang Chen ◽  
Jianping Xu ◽  
Fei Zeng ◽  
Rui Huang ◽  
Lei Wang
Keyword(s):  
Low Voltage ◽  
Three Phase ◽  
Voltage Stress ◽  
Switching Devices

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.

High Step-up DC/DC Converter with Low Input Current Ripple and Low Voltage Stress on Semiconductors

2021 ◽  
Author(s):  
Saed Mahmoud Alilou ◽  
Mohammad Maalandish ◽  
Soheil Nouri ◽  
Seyed Hossein Hosseini
Keyword(s):  
Low Voltage ◽  
Input Current ◽  
Low Input ◽  
Voltage Stress ◽  
Current Ripple
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