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In this paper we consider the problem of designing new elements to be added to an unknown circuit to achieve design objectives such as the assignment of current, voltage or power in prescribed branches. We develop a measurement based model-free approach to the solution of this problem based on the functional form of the variable on the design parameters which are assumed to vary in prescribed intervals...
This paper describes an observer for the diagnosis of the DC link voltage sensor for an electrical drive composed of a Permanent Magnet Synchronous Machine (PMSM) and a 3H bridge level grid connected inverter. The dynamics of the DC Voltage is function of duty cycles and the phase currents. Then, the observer can be used in a Fault Tolerant Control scheme to detect a DC link voltage sensor fault....
With increased renewable power penetration level the system operators of power grids require low-voltage ride-through (LVRT) capability of renewable power plants. The LVRT-capability has to be verified during the process of certification with precisely defined short circuit tests on a reactance based test bench. For the development of the fault ride through (FRT) capability the cost intensive reactance...
Model Predictive Control (MPC) offers a variety of advantages against linear control approaches (e.g. PI-Controller). Due to new approaches real-time implementation of MPC is already possible for permanent magnet synchronous motors with interior magnets (IPMSM). While the choice of the structure of the objective function to be minimized is quite intuitive, the adjustment of its weighting factors is...
Modern lithium-ion batteries, like LiMO2/Li4Ti5O12 chemistry, are having very high power capability, which drives the need for precise thermal modelling of the battery. Battery thermal models are required to avoid possible safety issues (thermal runaways, high-temperature gradients) but also for the optimal battery pack design and for predicting battery electrical performance during operation (especially...
Recently, special attention has been devoted to the health monitoring aspect of power electronics devices since it became an essential step to ensure and guarantee the availability of the overall power electronics systems. Dc-link capacitors, despite their type or technology are one of the main devices to monitor since they are responsible of more than 30% of the power electronics equipment breakdowns...
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