Electromagnetic Interference Analysis of DC-DC Converters Based on Piezoelectric Transformers
Resource
Japanese Journal of Applied Physics, 49(6), 061501
Journal
Japanese Journal of Applied Physics
Journal Volume
49
Journal Issue
6
Pages
-
Date Issued
2010
Date
2010
Author(s)
Abstract
Power electronic converters based on piezoelectric transformers (PTs) have been widely adopted in recent years owning to their many inherent advantages, such as safety, low profile, and high power density. However, few studies have been conducted about noise emitted by PT converters. In this work, we studied the conducted electromagnetic interference (EMI) characteristics in a 10W PT-based DC-DC converter. The different sources and specific couplings of EMI in this PT are presented. The experimental setup that allows us to study the various propagation paths and to measure the relevant impedances will be shown. A model that focuses on the parasitic impedances of the PT connected to the rectifier will be proposed. This model can show the paths of common noises in detail. We can observe that the EMI behaviours of PT-based converters are related to the isolated characteristics of the PT and the voltage waveforms of the connected circuits. Two connection methods between the PT and its driving circuit are discussed by both simulation and experiment to validify our model. © 2010 The Japan Society of Applied Physics .
SDGs
Other Subjects
Conducted electromagnetic interference; Connection method; Driving circuits; Electromagnetic interference analysis; Experimental setup; High power density; Low profile; Parasitic impedance; Piezoelectric transformers; Power electronic converters; Propagation paths; Voltage waveforms; Computer simulation; DC transformers; DC-DC converters; Electromagnetic pulse; Electromagnetic wave interference; Electromagnetism; Piezoelectric devices; Piezoelectricity; Platinum alloys; Power transformers; Signal interference; DC power transmission
Type
journal article
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