Accurate power loss models of complex converters
department or school: Applied Science, Faculty of
department or school: Electrical and Computer Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Garcia Perez, Maria Celeste
issued: 2019-12-16T17:15:50Z
issued: 2019
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Power loss estimation is essential for the design and optimization of power converters. Traditionally, the power loss estimation is done using datasheet-level information about the switching devices. However, this information is limited to isolated operating points, compromising the accuracy of the estimation. In addition, the representation of PCB effects and gate driver, which cannot be considered by using datasheet parameters, increase the complexity of the tasks by adding more unknown magnitudes and more complex equations without guaranteeing their correct estimation. In this work, a novel power loss estimation method, which can be applied to any topology, is presented. This proposed method utilizes Design of Experiments (DoE) and Response Surface Methodology (RSM) to model the different types of losses in all the elements in a power converter such as power switches, diodes, and inductors. With RSM, simple equations explain the different types of losses as a function of variables that directly affect them allowing the losses estimation under any operating condition accurately. These models are extensively validated to show the advantage of using the proposed method and significant improvement with respect to datasheet calculations is obtained. For complex topologies such as Power Factor Corrector (PFC), accurate power loss estimation is not only necessary but also a challenge. To show the capabilities of the proposed model, it is applied to Universal PFC, which is a complicated converter in terms of loss calculation and analysis. Using the proposed models, the inductor is designed optimally and the optimal switching frequency is selected to minimize the losses in the different input voltage levels. Experimental validation of the proposed method, prediction, and design impact is presented; the proposed method yields a power loss reduction up to 25%, having the greatest improvement at an input voltage of 110 V, and an output power higher than 500 W.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/72768
note: 9ccmrale Pgoer Dgkk Egdedk gf Cgehdep CgfnerlerkbyMaria Celeste Garcia PerezIng., Universidad Nacional del Comahue, 2015a thesis submitted in partial fulfillmentof the requirements for the degree ofEakler gf 9hhdaed Scaefceinthe faculty of graduate and postdoctoral studies(Electrical & Computer Engineering)The University of British Columbia(Vancouver)December 2019© Maria Celeste Garcia Perez, 2019The following individuals certify that they have read, and recommend to the Faculty ofGraduate and Postdoctoral Studies for acceptance, the thesis entitled:Accurate Power Loss Models of Complex Converterssubmitted by Maria Celeste Garcia Perez in partial fulfillment of the requirements forthe degree of Master of Applied Sciencein Electrical and Computer EngineeringEpaeafafg Cgeeallee2Dr. Martin Ordonez, Electrical and Computer EngineeringSupervisorDr. William Dunford, Electrical and Computer EngineeringCommittee Memberii9bklraclPower loss estimation is essential for the design and optimization of power converters. Tra-ditionally, the power loss estimation is done using datasheet-level information about theswitching devices. However, this information is limited to isolated operating points, com-promising the accuracy of the estimation. In addition, the representation of PCB effectsand gate driver, which cannot be considered by using datasheet parameters, increase thecomplexity of the tasks by adding more unknown magnitudes and more complex equationswithout guaranteeing their correct estimation.In this work, a novel power loss estimation method, which can be applied to any topology,is presented. This proposed method utilizes Design of Experiments (DoE) and ResponseSurface Methodology (RSM) to model the different types of losses in all the elements in apower converter such as power switches, diodes, and inductors. With RSM, simple equationsexplain the different types of losses as a function of variables that directly affect them allowingthe losses estimation under any operatin…
has type: Thesis/Dissertation
date issued: 2020-05
is shown at: 10.14288/1.0387143
language: eng
degree discipline: Electrical and Computer Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/72768