Expectation-Maximization Algorithm for Identification of Mesh-Based Compartment Thermal Model of Power Modules

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F24%3A43969267" target="_blank" >RIV/49777513:23220/24:43969267 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23520/24:43969267

Výsledek na webu

<a href="https://www.tandfonline.com/doi/full/10.1080/01457632.2023.2241174" target="_blank" >https://www.tandfonline.com/doi/full/10.1080/01457632.2023.2241174</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/01457632.2023.2241174" target="_blank" >10.1080/01457632.2023.2241174</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Expectation-Maximization Algorithm for Identification of Mesh-Based Compartment Thermal Model of Power Modules

Popis výsledku v původním jazyce

Accurate prediction of temperatures in power modules is crucial for proper thermal management. Lumped parameter thermal models are preferred in this application for their low computational cost. The estimation procedure of the parameters of these models requires measurements of temperatures of all active elements. This requirement is relaxed in this contribution. Specifically, the previously used dark gray-box compartment model is replaced by a structured compartment model utilizing a mesh-based discretization of the physical layout of the module. Compartments are categorized into several types with common parameters for each type. The parameters are identified from the data of the measured elements using the Expectation-Maximization algorithm. The algorithm internally predicts the temperatures of the unmeasured elements. The sensitivity of the estimation to regularization of the process covariance matrix is also studied. The implied high-dimensionality of the state-space increases the computational cost of the conventional estimation procedure, therefore, a simplified procedure with a much lower computation cost is proposed. The performance of the proposed approach is tested on simulated data.

Název v anglickém jazyce

Expectation-Maximization Algorithm for Identification of Mesh-Based Compartment Thermal Model of Power Modules

Popis výsledku anglicky

Accurate prediction of temperatures in power modules is crucial for proper thermal management. Lumped parameter thermal models are preferred in this application for their low computational cost. The estimation procedure of the parameters of these models requires measurements of temperatures of all active elements. This requirement is relaxed in this contribution. Specifically, the previously used dark gray-box compartment model is replaced by a structured compartment model utilizing a mesh-based discretization of the physical layout of the module. Compartments are categorized into several types with common parameters for each type. The parameters are identified from the data of the measured elements using the Expectation-Maximization algorithm. The algorithm internally predicts the temperatures of the unmeasured elements. The sensitivity of the estimation to regularization of the process covariance matrix is also studied. The implied high-dimensionality of the state-space increases the computational cost of the conventional estimation procedure, therefore, a simplified procedure with a much lower computation cost is proposed. The performance of the proposed approach is tested on simulated data.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/EF18_069%2F0009855" target="_blank" >EF18_069/0009855: Elektrotechnické technologie s vysokým podílem vestavěné inteligence</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Heat Transfer Engineering

ISSN

0145-7632

e-ISSN

1521-0537

Svazek periodika

45

Číslo periodika v rámci svazku

12-13

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

1055-1069

Kód UT WoS článku

001058228800001

EID výsledku v databázi Scopus

2-s2.0-85169816275