Indirect DC Link Current Measurement Technique Using an Op-Amp Circuit in an Automotive DC Converter with Coupled Inductors

International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management: Proceedings. Vol.1 2020
Artūrs Bogdanovs, Oskars Krievs, Johannes Pforr

This paper presents an accurate, reliable and cost-efficient phase current sensing solution for a balancing controller implementation in an automotive multi-phase DC converter with coupled inductors and multiple DC link capacitors. An indirect DC link current measurement technique using a single current sensor with an operational amplifier circuit is described on a 5-phase buck converter example. The idea of DC link current waveform reflection of the individual phase currents is used and extended for multiple input capacitor case. This paper describes DC link current sensing and phase current reconstruction procedures for a balancing controller implementation, which are approved through simulations and experimentally.

Atslēgas vārdi
multi-phase converter; indirect measurement; current sharing; coupled inductors; single DC link current sensor
Hipersaite
https://ieeexplore.ieee.org/document/9177979

Bogdanovs, A., Krievs, O., Pforr, J. Indirect DC Link Current Measurement Technique Using an Op-Amp Circuit in an Automotive DC Converter with Coupled Inductors. No: International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management: Proceedings. Vol.1, Vācija, Nuremberg, 7.-8. jūlijs, 2020. Berlin; Offenbach: Mesago PCIM GmbH, 2020, 60.-67.lpp. ISBN 978-3-8007-5245-4. ISSN 2191-3358.

Publikācijas valoda
English (en)