Abstract
This paper proposes a junction temperature estimation algorithm for the insulated gate bipolar transistor (IGBT) based on a power loss calculation and a thermal impedance model for inverter systems. The Simulink model was designed to calculate the power losses of power semiconductor devices and to estimate the junction temperature with a simplified thermal impedance model. This model can estimate the junction temperature up to the transient state, including the steady state. The parameters used to calculate the power losses, the thermal resistance, and the thermal capacitance were optimized for a given inverter to be tested for improving the accuracy. The simulation results and experimental measurement data were compared to verify the proposed junction temperature estimation algorithm. Finally, the algorithm was installed on the inverter controller, and the performance was verified by comparing the real time estimation result with the measured temperature.
Highlights
IntroductionPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
For Cases 1, 2, and 3, the junction temperature was estimated while driving along the speed-torque (S-T) curve of the interior permanent magnet synchronous motor (IPMSM)
The power loss calculation algorithm of this paper calculates the instantaneous power losses for each switching period, which were used as an input to the thermal impedance model
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The temperature management strategy of an insulated gate bipolar transistor (IGBT), which is the power module of an inverter, has become an important issue with the increasing development of inverters for driving traction motors in electric vehicle application
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