TY - JOUR
T1 - Thermal Modeling of Large Electrolytic Capacitors Using FEM and Considering the Internal Geometry
AU - Lledo-Ponsati, Tomas
AU - Bahman, Amir Sajjad
AU - Iannuzzo, Francesco
AU - Montesinos-Miracle, Daniel
AU - Galceran-Arellano, Samuel
N1 - Publisher Copyright:
IEEE
PY - 2021/10/1
Y1 - 2021/10/1
N2 - This article focuses on developing a finite-element method (FEM) model for large capacitors' thermal modeling and reliability analysis. Thermal modeling for capacitors is critical since the capacitor's lifetime depends on the capacitor's maximum temperature. Typically, capacitors have been modeled as a solid element, not considering the capacitor's internal geometry, leading to temperature estimation errors and requiring extensive testing to adjust the model. The presented methodology to develop the model considers the internal geometry to obtain a reliable model, with sufficient simplicity to adapt the methodology to any electrolytic capacitor. To achieve good results, the capacitor's winding is modeled as an anisotropic material to reproduce appropriately the behavior of the layers of aluminum and paper soaked in electrolyte. The results of the simulations match the experimental results closely, therefore validating the utility of the model.
AB - This article focuses on developing a finite-element method (FEM) model for large capacitors' thermal modeling and reliability analysis. Thermal modeling for capacitors is critical since the capacitor's lifetime depends on the capacitor's maximum temperature. Typically, capacitors have been modeled as a solid element, not considering the capacitor's internal geometry, leading to temperature estimation errors and requiring extensive testing to adjust the model. The presented methodology to develop the model considers the internal geometry to obtain a reliable model, with sufficient simplicity to adapt the methodology to any electrolytic capacitor. To achieve good results, the capacitor's winding is modeled as an anisotropic material to reproduce appropriately the behavior of the layers of aluminum and paper soaked in electrolyte. The results of the simulations match the experimental results closely, therefore validating the utility of the model.
KW - Analytical models
KW - capacitors
KW - Capacitors
KW - Finite element analysis
KW - Finite element methods
KW - Reliability
KW - reliability
KW - Solid modeling
KW - Thermal analysis
KW - thermal model
KW - Windings
UR - http://www.scopus.com/inward/record.url?scp=85112224542&partnerID=8YFLogxK
U2 - 10.1109/JESTPE.2021.3089899
DO - 10.1109/JESTPE.2021.3089899
M3 - Journal article
AN - SCOPUS:85112224542
SN - 2168-6777
VL - 9
SP - 6315
EP - 6328
JO - IEEE Journal of Emerging and Selected Topics in Power Electronics
JF - IEEE Journal of Emerging and Selected Topics in Power Electronics
IS - 5
ER -