scholarly journals A Relevant Inrush Current Limitation Based on SCRs Smart Control Used in EV Battery Chargers

2017 ◽  
Vol 1 (15) ◽  
Author(s):  
S. Jacques ◽  
C. Reymond ◽  
G. Benabdelaziz ◽  
J.C. Le Bunetel
Keyword(s):  
Inrush Current ◽  
Current Limitation ◽  
Battery Chargers ◽  
Smart Control

scholarly journals Fixed Switching Frequency Digital Sliding-Mode Control of DC-DC Power Supplies Loaded by Constant Power Loads with Inrush Current Limitation Capability

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1055 ◽  
Author(s):  
Abdelali El Aroudi ◽  
Blanca Martínez-Treviño ◽  
Enric Vidal-Idiarte ◽  
Angel Cid-Pastor
Keyword(s):  
Sliding Mode ◽  
Voltage Regulation ◽  
Boost Converter ◽  
Switching Frequency ◽  
Inrush Current ◽  
Resistive Load ◽  
Constant Power ◽  
Current Limitation ◽  
Power Load ◽  
Current Limiting

This paper proposes a digital sliding-mode controller for a DC-DC boost converter under constant power-loading conditions. The controller has been designed in two steps: the first step is to reach the sliding-mode regime while ensuring inrush current limiting; and the second one is to move the system to the desired operating point. By imposing sliding-mode regime, the equivalent control and the discrete-time large-signal dynamic model of this system are derived. The analysis shows that unlike with a resistive load, the boost converter under a fixed-frequency digital sliding-mode current control with external voltage loop open and loaded by a constant power load, is unstable. Furthermore, as with a resistive load, the system presents a right-half plane zero in the control-to-output transfer function. After that, an outer controller is designed in the z-domain for system stabilization and output voltage regulation. The results show that the system exhibits good performance in startup in terms of inrush current limiting and in transient response due to load and input voltage disturbances. Numerical simulations from a detailed switched model are in good agreement with the theoretical predictions. An experimental prototype is implemented to verify the mathematical analysis and the numerical simulation, which results in a perfect agreement in small-signal and steady-state behavior but also in a small discrepancy in the current limitation due a small propagation delay. Some efficient solutions have been proposed to mitigate the inrush current in the experimental results.

scholarly journals Comparison of the power balance in a Totem-Pole Bridgeless PFC topology with several inrush current limiting strategies

2021 ◽  
Vol 72 (1) ◽  
pp. 12-19
Author(s):  
Sébastien Jacques ◽  
Cédric Reymond ◽  
Jean-Charles Le Bunetel ◽  
Ghafour Benabdelaziz
Keyword(s):  
High Energy ◽  
Power Balance ◽  
Inrush Current ◽  
Battery Chargers ◽  
Current Limiting ◽  
Power Factor Corrector ◽  
Inrush Currents ◽  
Current Limiter ◽  
High Energy Efficiency ◽  
Type Power

Abstract Limiting inrush currents is usually necessary when AC-DC conversion is used to supply DC loads such as battery chargers in particular, it must comply with IEC 61000-3-3. This document discusses the suitability of an active inrush current limiter that can be used to replace traditional thermistors and NTC relays. This strategy is based on the control of the phase shift of thyristor type power components. It has been implemented in a totem-pole bridgeless power factor corrector (PFC). Experimental results show that this solution differs from traditional solutions to ensure high energy efficiency (higher than 95%) while limiting inrush currents.

scholarly journals Determination of soft starter firing angle performance to mitigate motor high inrush current using current limitation method

2020 ◽  
Vol 767 ◽  
pp. 012025
Author(s):  
Mohamad Shukor Abdul Rahim ◽  
Muhammad Mokhzaini Azizan ◽  
Mohd Irwan Yusoff ◽  
Mohd Hafizuddin Mat ◽  
Nur Irwany Binti Ahmad ◽  
...  
Keyword(s):  
Inrush Current ◽  
Current Limitation ◽  
Soft Starter ◽  
Limitation Method

Design and Simulation of Smart Control System for Internet Traffic Distribution on Servers by Using Fuzzy Logic System

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Raid Daoud ◽  
Yaareb Al-Khashab
Keyword(s):  
Fuzzy Logic ◽  
Control System ◽  
Input Parameter ◽  
Traffic Density ◽  
The Internet ◽  
Linguistic Variables ◽  
Internet Service ◽  
Traffic Distribution ◽  
Smart Control ◽  
High Level

The internet service is provided by a given number of servers located in the main node of internet service provider (ISP). In some cases; the overload problem was occurred because a demand on a given website goes to very high level. In this paper, a fuzzy logic control (FLC) has proposed to distribute the load into the internet servers by a smart and flexible manner. Three effected parameters are tacked into account as input for FLC: link capacity which has three linguistic variables with Gaussian membership function (MF): (small, medium and big), traffic density with linguistic variables (low, normal and high) and channel latency with linguistic variables (empty, half and full); with one output which is the share server status (single, simple and share). The proposed work has been simulated by using MATLAB 2016a, by building a structure in the Fuzzy toolbox. The results were fixed by two manners: the graphical curves and the numerical tables, the surface response was smoothly changed and translates the well-fixed control system. The numerical results of the control system satisfy the idea of the smart rout for the incoming traffics from the users to internet servers. So, the response of the proposed system for the share of server ratio is 0.122, when the input parameter in the smallest levels; and the ratio is 0.879 when the input parameters are in highest level. The smart work and flexible use for the FLC is the main success solution for most of today systems control.

An Identification Method of Magnetizing Inrush Current Phenomena in Distribution System

2010 ◽  
Vol 130 (4) ◽  
pp. 430-436 ◽  
Author(s):  
Naoki Dou ◽  
Atushi Toyama ◽  
Kohki Satoh ◽  
Tadashi Naitoh ◽  
Kazuyuki Masaki
Keyword(s):  
Distribution System ◽  
Inrush Current ◽  
Identification Method ◽  
Magnetizing Inrush Current
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