Details
| Original language | English |
|---|---|
| Pages (from-to) | 1139-1146 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Industry Applications |
| Volume | 34 |
| Issue number | 5 |
| Publication status | Published - 1998 |
| Externally published | Yes |
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 clocked stream of low-resolution digital data. By averaging this stream of data over a time interval that can be defined individually for each switching cycle, a high-resolution measurement of the input signal is obtained. Harmonic distortion of the waveform to be measured (caused by the switching of the power converter) is inherently filtered out due to proper choice of the averaging interval. The system is insensitive to noise and ringing caused by EMI or cable oscillations. The simplicity of the analog part of the sigma-delta A/D converter and its synchronous operation make it possible to integrate the whole sigma-delta converter into a small application specific integrated circuit (ASIC). The stream of low-resolution digital data at the output of the ASIC can be transmitted to the control electronics via a fiber-optic link that also insulates the sensing point from the control electronics, so that noninsulating sensors can be used.
Keywords
- A/D conversion, Application specific integrated circuit, Current and voltage sensing, Fiber-optic link, Integrating, Sigma-delta conversion
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
- Engineering(all)
- Electrical and Electronic Engineering
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In: IEEE Transactions on Industry Applications, Vol. 34, No. 5, 1998, p. 1139-1146.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Voltage and current sensing in power electronic converters using sigma-delta A/D conversion
AU - Mertens, Axel
AU - Eckardt, Dieter
PY - 1998
Y1 - 1998
N2 - 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 clocked stream of low-resolution digital data. By averaging this stream of data over a time interval that can be defined individually for each switching cycle, a high-resolution measurement of the input signal is obtained. Harmonic distortion of the waveform to be measured (caused by the switching of the power converter) is inherently filtered out due to proper choice of the averaging interval. The system is insensitive to noise and ringing caused by EMI or cable oscillations. The simplicity of the analog part of the sigma-delta A/D converter and its synchronous operation make it possible to integrate the whole sigma-delta converter into a small application specific integrated circuit (ASIC). The stream of low-resolution digital data at the output of the ASIC can be transmitted to the control electronics via a fiber-optic link that also insulates the sensing point from the control electronics, so that noninsulating sensors can be used.
AB - 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 clocked stream of low-resolution digital data. By averaging this stream of data over a time interval that can be defined individually for each switching cycle, a high-resolution measurement of the input signal is obtained. Harmonic distortion of the waveform to be measured (caused by the switching of the power converter) is inherently filtered out due to proper choice of the averaging interval. The system is insensitive to noise and ringing caused by EMI or cable oscillations. The simplicity of the analog part of the sigma-delta A/D converter and its synchronous operation make it possible to integrate the whole sigma-delta converter into a small application specific integrated circuit (ASIC). The stream of low-resolution digital data at the output of the ASIC can be transmitted to the control electronics via a fiber-optic link that also insulates the sensing point from the control electronics, so that noninsulating sensors can be used.
KW - A/D conversion
KW - Application specific integrated circuit
KW - Current and voltage sensing
KW - Fiber-optic link
KW - Integrating
KW - Sigma-delta conversion
UR - http://www.scopus.com/inward/record.url?scp=0032162757&partnerID=8YFLogxK
U2 - 10.1109/28.720455
DO - 10.1109/28.720455
M3 - Article
AN - SCOPUS:0032162757
VL - 34
SP - 1139
EP - 1146
JO - IEEE Transactions on Industry Applications
JF - IEEE Transactions on Industry Applications
SN - 0093-9994
IS - 5
ER -