DocumentCode :
2573972
Title :
Voltage and current sensing in power electronic converters using sigma-delta A/D conversion
Author :
Mertens, A. ; Eckardt, D.
Author_Institution :
Siemens AG, Erlangen, Germany
Volume :
2
fYear :
1996
fDate :
6-10 Oct 1996
Firstpage :
1092
Abstract :
This paper presents a novel approach to voltage and current measurement in power electronics using a sigma-delta A/D converter. The system converts the analog input signal into a digital stream of data. By averaging the digital data stream over a switching period of the power converter, the required measurement is obtained. Harmonic distortion of the input waveform and noise caused by EMI is inherently filtered out. The analog part of the sigma-delta A/D converter is very simple and operates synchronously to a clock. This makes it possible to integrate the sigma-delta converter into a small ASIC. The stream of digital data at the output of the ASIC can be transmitted using a fibre optic link that also insulates the sensing point from control electronics, so that noninsulating sensors can be used
Keywords :
electric current measurement; electric sensing devices; electromagnetic interference; harmonic distortion; power convertors; power system harmonics; sigma-delta modulation; voltage measurement; ASIC; current sensing; digital data stream; fibre optic link; input waveform harmonic distortion; measurement; power electronic converters; sigma-delta A/D conversion; switching period; voltage sensing; Application specific integrated circuits; Current measurement; Delta-sigma modulation; Distortion measurement; Electromagnetic interference; Harmonic distortion; Power electronics; Power measurement; Switching converters; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE
Conference_Location :
San Diego, CA
ISSN :
0197-2618
Print_ISBN :
0-7803-3544-9
Type :
conf
DOI :
10.1109/IAS.1996.560216
Filename :
560216
Link To Document :
بازگشت