scholarly journals An Extensive Review of Multilevel Inverters Based on Their Multifaceted Structural Configuration, Triggering Methods and Applications

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 433 ◽  
Author(s):  
Suvetha Poyyamani Sunddararaj ◽  
Shriram Srinivasarangan Rangarajan ◽  
Subashini N
Keyword(s):  
Structural Complexity ◽  
Electrical Current ◽  
Sine Wave ◽  
Extensive Review ◽  
Voltage Profile ◽  
Power Electronic Converters ◽  
Multilevel Inverters ◽  
Output Terminal ◽  
Direct Electrical Current ◽  
Asymmetric Hybrid

Power electronic converters are used to transform one form of energy to another. They are classified into four types depending upon the nature of the input and output voltages. The inverter is one among those types; it converts direct electrical current into alternating electrical current at desired frequency. Conventional types of inverters are capable of producing voltage at the output terminal that can only switch between two levels. The range of output voltage generated at the output is low when they are used for high power applications. To improve the voltage profile and efficiency of the overall system, multilevel inverters (MLIs) are introduced. In multilevel inverters the voltage at the output terminal is generated from several DC voltage levels fed at its input. The generated output is more appropriate to a sine wave and the dv/dt rating is also less leading to the reduction in EMI. Though they possess many advantages compared to the conventional inverters, the structural complexity and triggering techniques involved in designing multilevel inverters are high. Many studies are being carried out in defining new topologies of MLI with reduced switch as well as with the implementation of different PWM techniques. This paper will provide an extensive review on variety of MLI configurations based on the parameters such as the number of switches, switching techniques, symmetric, asymmetric, hybrid topologies, configurations based on applications, THD and power quality.

scholarly journals Low-level direct electrical current therapy for hepatic metastases. I. Preclinical studies on normal liver

1995 ◽  
Vol 72 (1) ◽  
pp. 31-34 ◽  
Author(s):  
DT Griffin ◽  
NJF Dodd ◽  
S Zhao ◽  
BR Pullan ◽  
JV Moore
Keyword(s):  
Hepatic Metastases ◽  
Normal Liver ◽  
Electrical Current ◽  
Current Therapy ◽  
Preclinical Studies ◽  
Low Level ◽  
Direct Electrical Current

Safe control of palmoplantar hyperhidrosis with direct electrical current

2002 ◽  
Vol 41 (9) ◽  
pp. 602-605 ◽  
Author(s):  
Yunus Karakoç ◽  
Ertuğrul H. Aydemir ◽  
M. Tunaya Kalkan ◽  
Gaye Ünal
Keyword(s):  
Electrical Current ◽  
Direct Electrical Current ◽  
Safe Control

Stimulation of bone formation by direct electrical current in an orthopedically expanded suture in the rat

2010 ◽  
Vol 40 (2) ◽  
pp. 106 ◽  
Author(s):  
Tancan Uysal ◽  
Mihri Amasyali ◽  
Huseyin Olmez ◽  
Yildirim Karslioglu ◽  
Omer Gunhan
Keyword(s):  
Bone Formation ◽  
Electrical Current ◽  
Direct Electrical Current ◽  
Stimulation Of

Placebo-controlled evaluation of direct electrical current administration for palmoplantar hyperhidrosis

2004 ◽  
Vol 43 (7) ◽  
pp. 503-505 ◽  
Author(s):  
Yunus Karakoc ◽  
Ertugrul H. Aydemir ◽  
M. Tunaya Kalkan
Keyword(s):  
Electrical Current ◽  
Direct Electrical Current ◽  
Controlled Evaluation

The effect of direct electrical current stimulation on the bone/porous metallic implant interface

Biomaterials ◽  
1980 ◽  
Vol 1 (4) ◽  
pp. 209-213 ◽  
Author(s):  
N.N. Salman ◽  
J.B. Park
Keyword(s):  
Electrical Current ◽  
Metallic Implant ◽  
Direct Electrical Current

scholarly journals Activity of fixed direct electrical current in experimental Staphylococcus aureus foreign-body osteomyelitis

2019 ◽  
Vol 93 (2) ◽  
pp. 92-95 ◽  
Author(s):  
Suzannah M. Schmidt-Malan ◽  
Cassandra L. Brinkman ◽  
Kerryl E. Greenwood-Quaintance ◽  
Melissa J. Karau ◽  
Jayawant N. Mandrekar ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Foreign Body ◽  
Electrical Current ◽  
Direct Electrical Current

scholarly journals Novel Switching Design Structure for Three Phase 21-Level Multilevel Inverter Fed BLDC Drive Application

2018 ◽  
Vol 9 (3) ◽  
pp. 1202 ◽  
Author(s):  
Srinivas Rao Janiga ◽  
P. Srinivasa Varma ◽  
T. Suresh Kumar
Keyword(s):  
High Voltage ◽  
Simulation Analysis ◽  
Multilevel Inverter ◽  
Voltage Profile ◽  
Multilevel Inverters ◽  
Design Structure ◽  
Three Phase ◽  
Series Configuration ◽  
Inverter Topology ◽  
Switching Devices

Multilevel Inverters offers eminent solutions to high voltage high power applications due to the association of several devices in a series configuration. This is moderate because of getting superior quality voltage waveform when using multilevel inverters as compared to form two-level inverters. Most of the problems raised in this study are the restriction of many switching devices, which can afford high voltage are preferred in the inverter. Here, a novel multilevel inverter topology with no transformers, less number of switching devices and gate drive circuits are proposed. The proposed inverter topologies can valid more voltage levels with favorable advantages such as less number of switching devices and gate driving circuits and also reduce to humble size, agreeable voltage profile. In this paper multilevel converter fed BLDC drive with different voltage levels and simulation analysis is presented. The validity of the proposed three-phase 21-level multilevel inverter fed to BLDC motor drive scheme is verified through Matlab/Simulink Platform.

Movement Disorders

2012 ◽  
Author(s):  
Mark Hallett ◽  
Alfredo Berardelli
Keyword(s):  
Movement Disorders ◽  
Electrical Current ◽  
Intracortical Inhibition ◽  
Clinical Results ◽  
Clinical Role ◽  
Direct Electrical Current ◽  
Therapeutic Uses ◽  
Low Levels ◽  
The Brain

This article focuses on the potential therapeutic uses of transcranial magnetic stimulation (TMS) in movement disorders. The brain can be stimulated with low levels of direct electrical current, called direct current polarization (tDCS). High-frequency repetitive TMS might increase brain excitability and be used for therapy in Parkinson's disease. Single sessions with TMS, however, have not proven to be very effective. Treatment with tDCS has been performed in some open studies with some success, but these results need confirmation. Physiological findings in dystonia reveal a decrease in intracortical inhibition. There have been a few studies of patients with Tourette's syndrome with mixed results. To date, clinical results with TMS in movement disorders have been mixed, and more work will be needed to clarify the potential clinical role of TMS.

Investigation of Switching Sequences on a Generalized SVPWM Algorithm for Multilevel Inverters

2018 ◽  
Vol 28 (02) ◽  
pp. 1950036 ◽  
Author(s):  
B. Hemanth Kumar ◽  
Makarand M. Lokhande
Keyword(s):  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Switching Loss ◽  
Voltage Profile ◽  
Switching Sequence ◽  
Multilevel Inverters ◽  
Harmonic Content ◽  
Simulation Results ◽  
Text Location

This paper investigates the various switching sequences on a generalized 60[Formula: see text] distributed coordinate system-based space vector pulse width modulation (SVPWM) algorithm for multilevel inverters. The main focus of this work is to improve the inverter output voltage profile by taking advantage of the redundancy inverter switching states. With the help of SVPWM algorithm, the three nearest vectors have to find out the synthesis of the [Formula: see text] location and then by applying the various optimum switching sequences, the inverter produces less harmonic content in the output voltage compared to the conventional switching sequence. All the switching sequence designs are developed with the help of minimum change detector (MCD) by using switching redundancies in order to reduce inverter switching loss. Simulation results to analyze various sequences on the general SVPWM algorithm are presented in the seven-level cascaded H-bridge (CHB) inverter. To validate the results, hardware results are presented on the seven-level CHB inverter.

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