Fredrik Wahledow

Efficient voltage feed-forward algorithms for switched mode power supplies

We present a number of approximation algorithms for voltage feedforward compensation of Switch Mode Power Supplies. The complexity of the algorithms differs, as well as their ability to suppress input voltage transients. The compensation is attained by manipulating the integral part of the feedback control law reducing the computation requirements and makes it suitable for firmware realization in standard Digital Pulse Width Modulation Integrated Circuits or as resource and power efficient implementations in ASICs.

A load capacitance identification algorithm for switched Mode Power Supplies

We present an algorithm for identification of the load capacitance for Switch Mode Power Supplies. The algorithm does not inject any disturbance that can cause additional noise on the output voltage of the power supply. The algorithm is computationally effective and is suitable for implementation in hardware or software. Experiments show an uncertainty of σ<inf>c</inf> = 100μF for the capacitance estimate using a current measurement with an uncertainty of σ<inf>I</inf> = 1A.