1. Constrained Control of Power Converters Veaceslav Spinu Supervisor: prof.dr.ir. P.P.J. van den Bosch Co-supervisor: dr. M. Lazar Eindhoven University of Technology 29 January 2014

2. You own dozens of power converters

3. Industrial applications Reliability, Efficiency, Precision and Speed

4. Construction of a power converter and the role of control

5. Measure Action >100,000 times/second Act Control _ + Reference

6. What are the constraints and why they matter -Safety constraints -Actuation constraints -Control structure constraints -Limited computation resources Car X Destination X X

7. Main research directions Fixed structure control Variable structure control

8. Fixed structure control Set theoretic methods – design a simple feedback controller that satisfies constraints Reference governors – adapt the reference such that the operation is safe

9. Variable structure control Model Predictive Control – optimal response – complex implementation Hybrid Polytopic Partition framework – hardware tailored – large domain of operation

10. Main research results Constrained control can make converters: smaller, faster and more reliable. Limitations of previous solutions: – Disjoint synthesis of the control gain and the contractive set in set- theoretic methods – Exponential complexity increase of the explicit MPC – Small signal distortions with the implicit MPC Proposed solutions – Iterative expansion of the contractive set and control gain computation – HPP framework for hardware tailored control synthesis – Dual Mode MPC for high-precision applications

11. Thank you for your attention and all the support during the last four years