1、 IEC TR 61000-4-40 Edition 1.0 2020-03 TECHNICAL REPORT Electromagnetic compatibility(EMC)Part 4-40:Testing and measurement techniques Digital methods for the measurement of power quantities of modulated or distorted signals IEC TR 61000-4-40:2020-03(en)colourinside THIS PUBLICATION IS COPYRIGHT PRO
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9、d French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC TR 61000-4-40 Edition 1.0 2020-03 TECHNICAL REPORT Electromagnetic compatibility(EMC)Part 4-40:Testing and measur
10、ement techniques Digital methods for the measurement of power quantities of modulated or distorted signals INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.100.01 ISBN 978-2-8322-7907-6 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this pub
11、lication from an authorized distributor.colourinside 2 IEC TR 61000-4-40:2020 IEC 2020 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.7 4 General.7 5 Modulated sine waveforms used in this document to compare measurement algorithms.9 5.1 General.9 5.2 Ha
12、lf-wave rectification.10 5.3 Full-wave rectification.10 5.4 Multi-cycle symmetrical control.11 5.5 Random on-off control.12 6 Measurement algorithms.12 6.1 General.12 6.2 Averaging algorithms.12 6.2.1 General.12 6.2.2 Performance of the averaging algorithm.13 6.2.3 Instrumental errors of the averagi
13、ng algorithm.18 6.3 Smoothing filter algorithm.19 6.3.1 Frequency and step response.19 6.3.2 Verification of the smoothing filter algorithm.21 6.3.3 Instrumental errors of the filtering algorithm.25 7 Conclusions.25 Annex A(informative)Smoothing filter studied in this document.27 A.1 Algorithm.27 A.
14、2 General C+class program code.31 Bibliography.34 Figure 1 Typical resistive load current and supply voltage waveform of half-wave rectification.10 Figure 2 Typical full-bridge rectifier current and supply voltage waveforms.11 Figure 3 Current and voltage patterns in an MCSC circuit,(left)1/3 MCSC a
15、nd(right)2/3 MCSC.11 Figure 4 Amplitude of 50 Hz current with on and off periods varying within a 1 min to 2 min range.12 Figure 5 Step response of an algorithm in Formula(6)with a half-cycle,1-cycle and 10-cycle measurement interval.14 Figure 6 RMS current and active power for half-wave rectificati
16、on.15 Figure 7 Sliding average RMS current and active power of a device controlled with a 1/3 MCSC circuit.15 Figure 8 Worst case 1/3 MCSC circuit active power calculation variation.16 Figure 9 Example of a 10 min sliding average power calculation for a load having a 92 s period.17 Figure 10 Active power of randomly fluctuating load averaged over a sliding 10 min interval.18 IEC TR 61000-4-40:2020 IEC 2020 3 Figure 11 Sensitivity of the full-bridge rectifier RMS current and active power measurem