Flatness based Control of DC-DC Converters with Constant Power Loads
Conference: PCIM Europe digital days 2021 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/03/2021 - 05/07/2021 at Online
Proceedings: PCIM Europe digital days 2021
Pages: 8Language: englishTyp: PDF
Authors:
Zauner, Michael; Mandl, Philipp; Hametner, Christoph (TU Wien, Christian Doppler Laboratory for Innovative Control and Monitoring of Automotive Powertrain Systems, Vienna, Austria)
Koenig, Oliver (AVL List GmbH, Austria)
Jakubek, Stefan (TU Wien, Institute of Mechanics and Mechatronics, Vienna, Austria)
Abstract:
In this paper, a new method for controlling DC-DC buck-converters with constant power loads (CPLs) is presented. The proposed method separates the system into two coupled subsystems which allows for different control concepts for each of them. By choosing the coupling between the subsystems as the rate of change in input current, a good approximation of the discontinuity introduced by the switches is given. A flatness based discrete control concept was developed, which allows for the creation of a nonlinear discrete control law, yielding a piecewise constant control input. The method is shown on the example of a DC-DC converter used in automotive testbeds and validated with high-fidelity simulations.