In high-quality education, topics concerning the behavior and control of electrical machines and power electronics have to be taught not only theoretically but also in a practical manner. Hard-and software tools are necessary to fulfil this obligation. Nevertheless, commercial systems partially lack of functionality or full accessibility to implement custom solutions, which is obligatory in the research and education domain. Therefore, a digital signal processing system is presented, that allows full modification of every used device, both in hardware and in software.

Traction converters in automotive applications benefit from various emerging technologies like semiconductormaterials such as SiC or converter topologies like multilevel converters. As especially novel topologies often lack an analytic way to determine their power losses or efficiency, comparability is often hard to achieve until each converter is built up and measured. With the proposed procedure of time-domain simulation, efficiency and loss maps can be calculated, visualizing possible impacts on the cruising range of arbitrary converter topologies. The simulation takes the drive train into account by including the electric machine in form of a standardized parameter set and the battery as fixed voltage source. Even machines with nonlinear magnetics or cross-coupling do not raise a problem, as the parameter set is entirely based on lookup tables. Moreover, simulation results as well as an experimental validation are presented.

A novel topology is proposed that interfaces between one or multiple DC sources and a three-phase machine. The DCside converter consists of two half-bridges that form a specialized converter. The half-bridges operate at a reduced voltage which reduces inductor effort and switching losses. The resulting four DC-link levels power two three-phase bridges that can drive open-winding machines. The circuit is analyzed and compared to the common three-phase-bridge with DC converter by means of component stress and thus component effort. Finally, closed loop control is examined, synthesized and confirmed by simulation results.

Abstract-In this contribution, a control scheme for n-leg interleaved DC/DC converters is presented, allowing dead beat current control. Accurate average current control is ensured even for nonlinear filter components such as iron powder inductors or ferrite core inductors used near their saturation limit.Furthermore, the control scheme features a common measurement instant for all measured values. The effectiveness of the proposed control scheme is shown with a three leg bidirectional DC/DC converter.

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