Visible to the public Investigation of time delay effects on the current in a power converter regulated by Phase-Shift Self-Oscillating Current Controller

TitleInvestigation of time delay effects on the current in a power converter regulated by Phase-Shift Self-Oscillating Current Controller
Publication TypeConference Paper
Year of Publication2019
AuthorsBellec, Q., le Claire, J.C., Benkhoris, M.F., Coulibaly, P.
Conference Name2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe)
PublisherIEEE
ISBN Number978-9-0758-1531-3
Keywords«Control methods for electrical systems», «Frequency-Domain Analysis», «High frequency power converter», «Modulation strategy», «Non-linear control», «Regulation», «Robust control», AC-DC power convertors, active filters, Bandwidth, composability, control systems, current sensor bandwidth, current spectrums analysis, DC-AC power convertors, Delay effects, delays, electric current control, electric sensing devices, Europe, Low pass filters, low-pass effect, maximum oscillation frequency, Metrics, motor control, oscillating behaviors, Oscillators, phase-shift self-oscillating current controller, power converter, power convertors, power factor correction, privacy, PSSOCC, pubcrawl, resilience, Resiliency, robust control, robust current controller, switching convertors, Switching frequency, time delay effects
Abstract

This paper deals with effects of current sensor bandwidth and time delays in a system controlled by a Phase-Shift Self-Oscillating Current Controller (PSSOCC). The robustness of this current controller has been proved in former works showing its good performances in a large range of applications including AC/DC and DC/AC converters, power factor correction, active filters, isolation amplifiers and motor control. As switching frequencies can be upper than 30kHz, time delays and bandwidth limitations cannot be neglected in comparison with former works on this robust current controller. Thus, several models are proposed in this paper to analyze system behaviours. Those models permit to find analytical expressions binding maximum oscillation frequency with time delay and/or additional filter parameters. Through current spectrums analysis, quality of analytical expressions is proved for each model presented in this work. An experimental approach shows that every element of the electronic board having a low-pass effect or delaying command signals need to be included in the model in order to have a perfect match between calculations, simulations and practical results.

URLhttps://ieeexplore.ieee.org/document/8915011
DOI10.23919/EPE.2019.8915011
Citation Keybellec_investigation_2019