New Method to Determine the Local Joule Heat Distribution in Fast Switching Devices

This work is concerned with the efficient calculation of the Ohmic losses in fast switching devices based on half bridge circuits. The methodology is to treat the system in the frequency domain avoiding expensive transient solutions. Here there are two basic types of loss distributions, the losses of the sinusoidal load current and the losses of the commutation current. A circuit simulation is carried out to determine the spectral content of the losses in order to determine the weights with which the two contributions to the loss distribution need to be added up.