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SYSTEM AND METHOD FOR ESTIMATING JUNCTION TEMPERATURES OF A POWER SEMICONDUCTOR MODULE
SYSTEM AND METHOD FOR ESTIMATING JUNCTION TEMPERATURES OF A POWER SEMICONDUCTOR MODULE
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机译:用于估计功率半导体模块的结温的系统和方法
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摘要
A system for estimating junction temperatures of a power semiconductor module includes a constant current source to apply constant drain current to a drain terminal of a power semiconductor device, an adjustable gate voltage source to apply a gate voltage signal to a gate terminal, a drain-source voltage sensor between the drain terminal and the source terminal and configured to measure a value of the current drain-source voltage across the power semiconductor device and output a corresponding drain-source voltage signal, a gate controller to determine a difference between the drain-source voltage signal and a constant reference voltage and control output of the adjustable gate voltage source dependent on the determined difference, and a system controller to switch the power semiconductor device to its fully conducting state and to estimate junction temperature within the power semiconductor device in dependency from the on-state resistance in the fully conducting state.
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