Self tuning pick-ups for inductive power transfer
- 1 June 2008
- conference paper
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE) in 2008 IEEE Power Electronics Specialists Conference
- No. 02759306,p. 3489-3494
- https://doi.org/10.1109/pesc.2008.4592495
Abstract
Inductive power transfer systems are now commonly used in ultra clean or dirty industrial applications to deliver power to both moving and stationary loads without contact. Each load requires a power pick-up and regulator that is coupled to a track, which carries a resonant current at VLF frequencies (typically 10-50 kHz). Modern pick-ups are tuned for resonance at the track frequency and their power delivery increasingly depends on accurate tuning of the resonant circuit. In this paper a new self tuning power regulator for inductive power transfer systems is proposed and a control strategy described. The system uses a binary weighted series of capacitors that can be switched via simple relays across a parallel resonant pick-up circuit. There are no additional switching losses during tuning, detection and operation so that the technique is applicable to high power pick-ups. The tuning circuit is evaluated under simulation and then made to operate on a practical 500 W pick-up regulator used in materials handling applications. In both simulation and experiment it is shown to successfully detect the tuning state of the system and correct for it during operation.Keywords
This publication has 9 references indexed in Scilit:
- Switching Frequency Analysis of Dynamically Detuned ICPT Power Pick-upsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- Design and analysis of an adaptive transcutaneous power telemetry for biomedical implantsIEEE Transactions on Circuits and Systems I: Regular Papers, 2005
- Design Considerations for a Contactless Electric Vehicle Battery ChargerIEEE Transactions on Industrial Electronics, 2005
- A variable inductor based tuning method for ICPT pickupsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Improved Power Flow Control for Contactless Moving Sensor ApplicationsIEEE Power Electronics Letters, 2004
- Design and Implementation of Low-Profile Contactless Battery Charger Using Planar Printed Circuit Board Windings as Energy Transfer DeviceIEEE Transactions on Industrial Electronics, 2004
- DC analysis technique for inductive power transfer pick-upsIEEE Power Electronics Letters, 2003
- Stability and control of inductively coupled power transfer systemsIEE Proceedings - Electric Power Applications, 2000
- Large air-gap coupler for inductive charger [for electric vehicles]IEEE Transactions on Magnetics, 1999