A RATIONAL FORMULATION OF THERMAL CIRCUIT MODELS FOR ELECTROTHERMAL SIMULATION .2. MODEL-REDUCTION TECHNIQUES

To increase the efficiency of the electrothermal simulation of power e lectronic circuits and devices, model reduction techniques are applied to develop reduced thermal circuit models of Si chips, thermal packag es, and heat sinks. Both the Modal Superposition method and a Componen t Mode Synthesis method are presented together with a model error esti mation and a Ritz vector method, An alternative method for substructur ing is also included, The reduced thermal circuit models are verified and implemented in the SABER circuit simulator, The electrothermal mod el of a full-bridge converter is simulated employing the proposed appr oach, and the results discussed.