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A coupled system simulator, based on analytical circuit equations and a finite element method (FEM) model of the motor, is used to analyze a direct-torque-controlled (DTC) frequency-converter-fed industrial 200 kW squirrel-cage induction motor. The measured stator voltage waveforms are used as inputs to the FEM motor model, and the results are compared with the measured ones. Comparison is also made...
During operation steep lateral temperature gradients evolve in IGBT power semiconductor chips. The influence of these lateral gradients on the measurement of the virtual junction temperature by means of the widely used VCE(T)-method was investigated. In particular we address the question, how the obtained single temperature value is connected to the temperature distribution of the chip. A combination...
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