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This paper presents a model based junction temperature control system to increase the expected lifetime of IGBT power modules by using a hybrid discontinuous modulation technique. This modulation technique offers the possibility to influence the switching losses and is therefore used as a correcting variable for controlling the junction temperatures of IGBT power modules.
For drive train efficiency estimation, three-level inverters are analyzed regarding different modulation techniques and switching frequencies. In this paper an optimized operating mode selector is proposed to choose a loss optimal modulation technique and switching frequency for each operating point. Energy savings due to the operating mode selector are validated on a driving cycle.
For drive train efficiency estimation, loss models of the battery, an optional DC/DC converter, an inverter and the electrical machine are presented. Harmonic iron losses of the machine caused by current ripple ar'e considered in order to evaluate various modulation strategies and switching frequencies of the inverter. Battery voltage optimizations are analysed regarding the overall drive train efficiency...
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