scholarly journals New Research on AC-AC Converters without Intermediate Storage and Their Applications in Power-Electronic Transformers and AC Drives

2009 ◽  
Vol 4 (5) ◽  
pp. 591-601 ◽  
Author(s):  
Krushna Keshab Mohapatra ◽  
Ranjan Gupta ◽  
Satish Thuta ◽  
Apurva Somani ◽  
Amod Umarikar ◽  
...  
Keyword(s):  
Power Electronic ◽  
Ac Drives ◽  
Intermediate Storage ◽  
New Research ◽  
Ac Converters

scholarly journals A Unified Approach for the Control of Power Electronics Converters. Part II: Tracking

2021 ◽  
Vol 11 (16) ◽  
pp. 7618
Author(s):  
Germain Garcia ◽  
Oswaldo Lopez-Santos ◽  
Luis Martinez-Salamero
Keyword(s):  
Tracking Control ◽  
Research Work ◽  
Reference Signal ◽  
Control Problems ◽  
Power Electronic ◽  
Power Electronic Converters ◽  
Unified Approach ◽  
Power Electronics Converters ◽  
Mathematical Properties ◽  
Ac Converters

This paper extends the results recently proposed in Part I of this research work focused on the stabilization of power electronic converters. This second part is devoted to cases in which the underlying control problems can be translated into tracking control problems. This is the case for DC-AC converters whose output must track a sinusoidal reference signal. The idea is to tackle the problem in a unified manner in order to avoid as much as possible the use of approximations and to exploit all the mathematical properties of the corresponding switched models. The case in which measurable or non-measurable perturbations are present is considered. The proposed techniques are illustrated for two particular DC-AC converters simulated using the PSIM software.

scholarly journals Machine learning based multi class fault diagnosis tool for voltage source inverter driven induction motor

2021 ◽  
Vol 12 (2) ◽  
pp. 1205
Author(s):  
Jyothi R ◽  
Tejas Holla ◽  
Uma Rao K ◽  
Jayapal R
Keyword(s):  
Machine Learning ◽  
Real Time ◽  
Induction Motor ◽  
Diagnostic Tool ◽  
Voltage Source ◽  
Power Electronic ◽  
Real Time Monitoring ◽  
Process Industries ◽  
Ac Drives ◽  
Wide Range

AC drives are employed in process industries for varying applications resulting in a wide range of ratings. The entire process industry has seen a paradigm shift from manual to automated systems. The major factor contributing to this is the advanced power electronics technology enabling power electronic drives for smooth control of electric motors. Induction motors are most commonly used in industries. Faults in the power electronic circuits may occur periodically. These faults often go unnoticed as they rarely cause a complete shutdown and the fault levels may not be large enough to lead to a breakdown of the drive. An early detection of these faults is required to prevent their escalation into major faults. The diagnostic tool for detection of faults requires real time monitoring of the entire drive. In this work, detailed investigation of different faults that can occur in the power electronic circuit of an industrial drive is carried out. Analysis and impact of faults on the performance of the induction motor is presented. A real time monitoring platform is proposed to detect and classify the fault accurately using machine learning. A diagnostic tool also is developed to display the severity and location of the fault to the operator to take corrective measures.

scholarly journals SiC Power Devices for Applications in Hybrid and Electric Vehicles

2019 ◽  
Vol 963 ◽  
pp. 869-872
Author(s):  
Nima Zabihi ◽  
Asim Mumtaz ◽  
Tom Logan ◽  
Thilini Daranagama ◽  
Richard A. McMahon
Keyword(s):  
Electric Vehicles ◽  
Power Loss ◽  
Dead Time ◽  
The Other ◽  
Power Electronic ◽  
Battery Management ◽  
Power Devices ◽  
Bridge Circuits ◽  
Ac Converters ◽  
Insight Into

Power electronic inverters and converters are an essential technology in the battery management and propulsion for Hybrid and Electric vehicles (HEVs). In order to improve competitiveness of HEVs there is a drive to improve the conversion efficiency of the power electronics. Using Silicon Carbide (SiC) power devices has been identified as a key enabler of future improvements in performance but it is essential to understand how these devices perform in an automotive context. Two similar half bridge circuits has been built using SiC MOSFETs, one with and the other without anti-parallel Schottky SiC diode. In this paper the power loss and efficiency of half-bridge has been compared as the dead-time is changed. Effect of changing dead-time on the converter are shown. The paper gives insight into these phenomena with additional experimental data supported by simulation. The implications for using SiC devices in both DC to DC and DC to AC converters are discussed.

Analysis of a New Reduced Switch Nine Level Inverter

2016 ◽  
Vol 1 (3) ◽  
pp. 490
Author(s):  
C.R. Balamurugan ◽  
S.P. Natarajan ◽  
R. Bensraj
Keyword(s):  
High Power ◽  
Output Voltage ◽  
Multilevel Inverter ◽  
Power Electronic ◽  
Switching Strategy ◽  
Ac Drives ◽  
Multi Level ◽  
Structural Parts ◽  
The Cost ◽  
Electronic Switches

<p>The multi level inverter system is mostly used in ac drives, when both reduced harmonic contents and high power are required. In this paper a new topology of multilevel inverter is introduced. This type has many steps with less power electronic switches. Due to the less number of switches the cost of the inverter is very less and also less installation area is required. Firstly, we describe briefly the structural parts of the inverter then switching strategy and operational principles of the proposed inverter are explained and operational topologies are given. Simulation is performed using MATLAB SIMULINK. Various PWM techniques are applied to the circuit such as PDPWM, PODPWM, APODPWM, VFPWM and COPWM. By comparing among the PWM techniques, PODPWM provide the less THD value and COPWM provide a higher fundamental RMS output voltage.</p><p> </p>

scholarly journals Power Electronic Converters for Microgrids

2021 ◽  
Author(s):  
Wenlong Ming
Keyword(s):  
Building Blocks ◽  
Power Electronic ◽  
Energy Integration ◽  
Power Electronic Converters ◽  
Enabling Technology ◽  
Three Phase ◽  
Bandgap Semiconductors ◽  
Ac Converters ◽  
Transportation Electrification ◽  
And Control

Power electronic converters are indispensable building blocks of microgrids. They are the enabling technology for many applications of microgrids, e.g., renewable energy integration, transportation electrification, energy storage, and power supplies for computing. In this chapter, the requirements, functions, and operation of power electronic converters are introduced. Then, different topologies of the converters used in microgrids are discussed, including DC/DC converters, single-phase DC/AC converters, three-phase three-wire, and four-wire DC/AC converters. The remaining parts of this chapter focus on how to optimally design and control these converters with the emerging wide-bandgap semiconductors. Correlated tradeoffs of converter efficiency, power density, and cost are analyzed using Artificial Neural Networks to find the optimal design of the converters.

AC/AC Conversion

2010 ◽  
pp. 98-133
Keyword(s):  
Power Factor ◽  
Sine Wave ◽  
Power Electronic ◽  
Power Electronic Converters ◽  
Operational Principle ◽  
Ac Power ◽  
Source Voltage ◽  
Ac Converters ◽  
Power Electronic Converter ◽  
Made In

The operational principle of a classical converter of AC into AC energy is described in Section 1 Chapter 3. It includes an explanation of the basic idea on which the operation of the further down studied power electronic converters is based. The basic indicators of a power electronic converter supplied by an AC power have been studied in Chapter 4. The conclusions made in it according the ways of the increase of the power factor KP are also valid in AC/AC converters. The purpose is to consume current with a waveform as close as possible to a sine wave (with low contents of harmonics) and whose first harmonic to be in phase with the source voltage.

What is taken for granted in autism research?

2019 ◽  
Vol 42 ◽  
Author(s):  
Michele Ilana Friedner
Keyword(s):  
Research Methodologies ◽  
Communicative Practices ◽  
Autism Research ◽  
Autistic People ◽  
The Social ◽  
New Research

Abstract This commentary focuses on three points: the need to consider semiotic ideologies of both researchers and autistic people, questions of commensurability, and problems with “the social” as an analytical concept. It ends with a call for new research methodologies that are not deficit-based and that consider a broad range of linguistic and non-linguistic communicative practices.

Ultrahigh Energy Storage Performances of Polymer-based Nanocomposite via Interfaces Engneering

2020 ◽  
Author(s):  
Peng Wang ◽  
Zhongbin Pan ◽  
Weilin Wang ◽  
Jianxu Hu ◽  
Jinjun Liu ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Energy Storage ◽  
High Performance ◽  
Breakdown Strength ◽  
Composite Films ◽  
Power Electronic ◽  
Ultrahigh Energy

High-performance electrostatic capacitors are in urgent demand owing to the rapidly development of advanced power electronic applications. However, polymer-based composite films with both high breakdown strength (Eb) and dielectric constant...

Sign in / Sign up

Export Citation Format

Share Document