Adaptive pulse width modulation design for power converters based on affine switched systems

Adaptive pulse width modulation design for power converters based on affine switched systems

Baldi, S. (TU Delft Team Bart De Schutter)
Papachristodoulou, Antonis (University of Oxford)
Kosmatopoulos, Elias B. (Democritus University of Thrace; Centre for Research and Technology-Hellas)

2018

In this work we propose a novel adaptive switching strategy for the design of pulse width modulation signals in power converters. Instead of an uncertain averaged model of the power converter, an uncertain switched model is considered, which can better represent the actual power converter dynamics. Uncertainties in the power converters parameters are handled via an adaptive control approach, and all circuit parameters of the switched model are assumed to be unknown (including the load and parasitic effects). After defining the pulse width modulation in terms of a reverse mode-dependent dwell time, an elementary-time-unit Lyapunov function is used to derive a set of linear matrix inequalities (LMIs) based on global uniformly ultimately boundedness of the switched system. The LMIs are solved in an adaptive fashion using an exploitation–exploration mechanism: exploitation is achieved by solving the LMIs based on the estimated switched model, while exploration is achieved by a persistently exciting input voltage source, which guarantees convergence of the estimated parameters to the true system parameters.

Adaptive control
Mode-dependent dwell time
Power converters
Switched systems

http://resolver.tudelft.nl/uuid:1fc3ea00-d9b2-441d-82bb-7917cbc5ab99

https://doi.org/10.1016/j.nahs.2018.07.002

2019-08-01

1751-570X

Nonlinear Analysis: Hybrid Systems, 30, 306-322

Institutional Repository

journal article

© 2018 S. Baldi, Antonis Papachristodoulou, Elias B. Kosmatopoulos