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State Plane Analysis and Optimization of CLLC Resonant Converter for Bidirectional EV Charger
, Ph.D. Dissertation Sharif University of Technology ; Tahami, Farzad (Supervisor) ; Schanen, Jean-Luc (Supervisor)
Abstract
As more renewables step in, the ongoing change will be drastic for the electrical grid. The energy sector must find new ways to balance energy production and consumption. Electric vehicle (EV) batteries are by far the most cost-efficient form of energy storage since they require no additional investments in hardware. A bidirectional EV charger is a new technology that enables energy to be pushed back to the power grid and auxiliary loads from the battery. The electrical requirements of the EV charger are examined in detail to find an appropriate power electronics converter to meet all the requirements. The CLLC resonant converter is a promising candidate for high efficient, bidirectional...
Generalized State-Plane analysis of bidirectional CLLC resonant converter
, Article IEEE Transactions on Power Electronics ; 2021 ; 08858993 (ISSN) ; Tahami, F ; Schanen, J ; Sarrazin, B ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2021
Abstract
The CLLC resonant converter is a promising candidate for high efficient, bidirectional power transfer applications such as vehicle-to-grid (V2G) on-board charger and hybrid vehicle DC-DC converter. Nevertheless, the analysis of CLLC still remains challenging because of its complex multi-resonant nature and several storage elements. In this paper, a circuit analysis method based on change of variables is presented that maps the state space equations into two decoupled sets of equations. The analyses are carried out in two state-plane coordinate systems, then the results are mapped onto the original region. The proposed method is then used to thoroughly analyze the CLLC resonant converter...
Generalized state-plane analysis of bidirectional CLLC resonant converter
, Article IEEE Transactions on Power Electronics ; Volume 37, Issue 5 , 2022 , Pages 5773-5785 ; 08858993 (ISSN) ; Tahami, F ; Schanen, J. L ; Sarrazin, B ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2022
Abstract
The CLLC resonant converter is a promising candidate for high efficient, bidirectional power transfer applications, such as vehicle-to-grid on-board charger and hybrid vehicle dc-dc converter. Nevertheless, the analysis of CLLC still remains challenging because of its complex multiresonant nature and several storage elements. In this article, a circuit analysis method based on change of variables is presented that maps the state-space equations into two decoupled sets of equations. The analyses are carried out in two state-plane coordinate systems, then the results are mapped onto the original region. The proposed method is then used to thoroughly analyze the CLLC resonant converter...
Design and implementation of a predictive controller for reducing the torque ripple in direct torque control based high frequency induction motor drives
, Article 2004 IEEE 35th Annual Power Electronics Specialists Conference, PESC04, Aachen, 20 June 2004 through 25 June 2004 ; Volume 2 , 2004 , Pages 1169-1174 ; 02759306 (ISSN) ; Zolghadri, M. R ; Roye, D ; Guiraud, J ; Schanen, J. L ; Sharif University of Technology
2004
Abstract
In Direct Torque Control, selection of each voltage vector is based on the measured parameters in the beginning of the sampling period. Due to the fast dynamic of torque, this delay causes an extra torque ripple. In this paper, a new predictive controller is proposed for compensating this delay and reducing the torque ripple. The stator current is measured in the beginning of each sampling period and its expected value in the end of period is predicted according to an extrapolation algorithm. This algorithm is performed by calculating the slope of stator current variation according to the stator flux variation. Thus, there is no need to solve the high order equations of machine. The...
Search for Supersymmetry in Like Sign Dilepton Events in 2010 GMS Data
, Ph.D. Dissertation Sharif University of Technology ; Ardalan, Farhad (Supervisor) ; Pape, Luc (Supervisor)
Abstract
We search for supersymmetry in the same-sign dilepton final state in the first 35 pb1 of data collected by the CMS detector and find no evidence of new physics at this point. Since true same-sign physics backgrounds, such asWWjj, are negligible for this amount of integrated luminosity, we focus our attention on data-driven estimations of the backgrounds where one (W+jets and tt backgrounds) or both of the leptons (QCD background) are fake. We use the generalized fake ratio method documented to estimate the rates for these fake backgrounds. Another source of backgrounds in the case of electrons is the charge-flip, where the charge of one of the electrons in an opposite-sign di-electron pair...
Searches for New Physics with Opposite-Sign Di-Leptons(Using the CMS Experiment at the Large Hadron Collider)
, Ph.D. Dissertation Sharif University of Technology ; Arfaei, Hessamaddin (Supervisor) ; Pape, Luc ($item.subfieldsMap.e)
Abstract
Among the proposals for new physics, Supersymmetry is the most popular to gradually appear at a yet unreached center-of-mass energy at the Large Hadron Collider (LHC). However, that doesn’t seem very likely. This thesis represents a search for any evidence of a minimal supergravity inspired scenario (mSUGRA) of R-parity conserving supersymmetry at the Compact Muon Solenoid (CMS) experiment. The analysis employs an event topology , which consists primarily of opposite-sign di-leptons accompanied by hadronic jets and missing transverse energy. The search utilizes data produced by the proton-proton collision of the LHC at a center-of-mass energy p s = 7 TeV and recorded by the CMS detector in...
Operations research and optimization conference
, Article Bulletin of the Iranian Mathematical Society ; Volume 42, Issue 7 Special Issue , 2016 , Pages 1-3 ; 10186301 (ISSN) ; Mahdavi Amiri, N ; Martínez Legaz, J. E ; Soleimani Damaneh, M ; Sharif University of Technology
Iranian Mathematical Society
2016