Abstract
This paper presents the use of spread spectrum technique to reduce electromagnetic interference caused by fast switching transitions of a resonant inverter and rectifier used for wireless power transfer (WPT) systems. We investigate the magnetic field emission from a series-resonant WPT system having the resonance frequency of 20 kHz in a frequency band from 9 kHz to 150 kHz. The averaging spectral estimate (Welch's Periodogram) of the simulated leakage magnetic field shows that a harmonic peak can be reduced up to 8.7 dB by dithering the switching frequency with a triangular modulation profile.
| Original language | American English |
|---|---|
| Journal | Proceedings of the 2016 IEEE Wireless Power Transfer Conference (2016, Aveiro, Portugal) |
| DOIs | |
| State | Published - May 1 2016 |
Keywords
- Electric power systems
- Electric rectifiers
- Electromagnetic pulse
- Frequency bands
- Interference suppression
- Magnetic fields
- Magnetic leakage
- Spectroscopy, Leakage magnetic field
- Resonance frequencies
- Resonant inverters
- Spectral estimate
- Spread spectrum techniques
- Triangular modulations
- Wireless power transfer
- Wireless power transfer (WPT), Inductive power transmission
Disciplines
- Electromagnetics and Photonics
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