Thermal–electrical averaging model of resonant converters based on extended describing function method

Abstract

Owing to limited computational resources and the very large difference between electrical and thermal time constants, simulation for resonantly operated DC-DC converters using physical or ideal switching model is very time-consuming or impossible. In this contribution, a novel thermal-electrical averaging model of resonantly operated DC-DC converters is proposed to reduce the computational burden and time consumption. The thermal-electrical model is based on extended describing function method. All required parameters for the thermal model can be obtained from the datasheets or on the website. The thermal-electrical models are applied in series-parallel resonant converters with LC-type and C-type output filters as examples, and verified by comparison with two standard simulation tools. The thermal-electrical modelling procedure proposed in this contribution can of course also be applied for other types of resonant converters, such as series resonant converter, parallel resonant converter and multi-phase resonant converter.

Electrical method to measure the transient thermal impedance of insulated gate bipolar transistor module

“…This can be ascribed to the decreasing l with the higher temperature. Z th is inversely proportional to l. Therefore Z th increases with T X [19][20][21]. For most materials used in power electronic packaging, l as function of temperature (T ) is given as follows in the relevant temperature range, that is, between −50°C and 200°C [19]…”

Smooth control of insulated gate bipolar transistors junction temperature in a small‐scale wind power converter

“…Before thermal management, junction temperature of the module should be investigated first. Besides temperature measurement, electro‐thermal model is an effective tool for temperature evaluation [6–8]. Thermal management can be divided into two categories: internal thermal management and exterior management.…”