Thermal network transformation: Foster fourth order to Cauer first order?
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Diego Velazco
el 19 de Jul. de 2019
Hello, in the symscape power systems example "Loss Calculation in a Three-Phase 3-Level Inverter" there's a block of a half-bridge IGBT with loss calculation. I wanted to know how you calculated the junction to case thermal resistance and the junction thermal capacitance for this block, since the manufacturer’s datasheet only gives the R and C parameters of a fourth order Foster network, and from what I see in the example the junction to case thermal resistance and the junction thermal capacitance correspond to a first order Cauer representation.
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Carlos Rueda
el 19 de Dic. de 2019
Movida: Sabin
el 23 de Dic. de 2022
A method to find the equivalent Cauer network from the fourth-order Foster network is shown in Appendix A of book "Transient Electro-Thermal Modeling of Bipolar Power Semiconductor Devices" by Gachovska et al.
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Joel Van Sickel
el 24 de Ag. de 2020
Moving Carlos Rueda's answer down here to clean up which questions are flagged as unanswered.
A method to find the equivalent Cauer network from the fourth-order Foster network is shown in Appendix A of book "Transient Electro-Thermal Modeling of Bipolar Power Semiconductor Devices" by Gachovska et al.
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