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Conditional Pulse Density Modulation for Inductive Power Transfer Systems

Abstract

This letter proposes a conditional pulse density modulation (PDM) method for Inductive Power Transfer (IPT) systems, which can automatically adapt the generated output patterns to effectively suppress current/power ripples. The proposed conditional PDM introduces a sending current limitation as an additional condition to skip pulses, which modifies the output patterns generated by conventional delta-sigma-based PDM. Thus, the PDM pulse pattern is continuously adapted to attenuate any excited current/power oscillations. The presented modulator is simple to implement and well-suited for IPT systems with poorly damped constant voltage load characteristics. Simulations and experiments demonstrate the effectiveness of the proposed modulation method.
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Category

Academic article

Language

English

Author(s)

Affiliation

  • SINTEF Energy Research / Energisystemer
  • Norwegian University of Science and Technology
  • Nanyang Technological University

Year

2023

Published in

IEEE transactions on power electronics

ISSN

0885-8993

Volume

39

Issue

1

Page(s)

88 - 93

View this publication at Norwegian Research Information Repository