Method to estimate power dissipation of an inverter

摘要

A method to estimate power dissipation of an inverter (10) configured to control electric energy to an electric machine (12). The method can estimate both conductive power losses and switched power losses of a transistor (22) or a diode (24) in a power switch or driver stage of the inverter (10). The estimation includes applying a correction factor (CF) to power dissipation calculations if the modulation index of the inverter (10) is greater than a threshold indicating that the inverter (10) is being over-driven or operated in a non-linear region.