Test methods for electrical and magnetic properties of magnetic powder cores

This standard provides the test methods for the electrical and magnetic properties of magnetic powder cores used for inductive components in electronics equipment, switch-mode power supplies and power conversion equipment, and introduces measuring principles, scope of application and matters needing attention for each method.
The parameters used to characterize the magnetic powder cores include: inductance factor, effective permeability, complex relative permeability, temperature coefficient of permeability, frequency coefficient of permeability, DC bias characteristic, power loss, and quality factor. This standard is the basis for determining the characteristic parameters of magnetic powder cores.

Méthodes d'essai des propriétés électriques et magnétiques des noyaux en poudre magnétique

Preskusne metode za električne in magnetne lastnosti jeder iz magnetnega prahu

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Not Published
Public Enquiry End Date
31-Mar-2022
Current Stage
4020 - Public enquire (PE) (Adopted Project)
Start Date
19-Jan-2022
Due Date
08-Jun-2022

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SLOVENSKI STANDARD
oSIST prEN IEC 63300:2022
01-marec-2022
Preskusne metode za električne in magnetne lastnosti jeder iz magnetnega prahu
Test methods for electrical and magnetic properties of magnetic powder cores
Méthodes d'essai des propriétés électriques et magnétiques des noyaux en poudre
magnétique
Ta slovenski standard je istoveten z: prEN IEC 63300:2022
ICS:
29.030 Magnetni materiali Magnetic materials
29.100.10 Magnetne komponente Magnetic components
oSIST prEN IEC 63300:2022 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 63300:2022
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oSIST prEN IEC 63300:2022
51/1401/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63300 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-01-14 2022-04-08
SUPERSEDES DOCUMENTS:
51/1368/CD, 51/1379/CC
IEC TC 51 : MAGNETIC COMPONENTS, FERRITE AND MAGNETIC POWDER MATERIALS
SECRETARIAT: SECRETARY:
Japan Mr Takeshi Abe
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 68
Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING

Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.

Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they

are aware and to provide supporting documentation.
TITLE:
Test methods for electrical and magnetic properties of magnetic powder cores
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:

Copyright © 2021 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this

electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.

You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without

permission in writing from IEC.
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oSIST prEN IEC 63300:2022
IEC CDV 63300 © IEC 2021 - 2 - 51/1401/CDV
CONTENTS

1 FOREWORD ........................................................................................................................... 6

2 INTRODUCTION ..................................................................................................................... 8

3 1 Scope .............................................................................................................................. 9

4 2 Normative references ...................................................................................................... 9

5 3 Terms, definitions and symbols ....................................................................................... 9

6 4 Instruments and equipment ........................................................................................... 10

7 4.1 General provision .................................................................................................. 10

8 4.2 Excitation source .................................................................................................. 10

9 4.2.1 General provision .......................................................................................... 10

10 4.2.2 Sinusoidal wave excitation source ................................................................. 10

11 4.2.3 Square wave excitation source ...................................................................... 10

12 4.2.4 Calculation of magnetic flux density ............................................................... 11

13 4.3 Measuring equipment ............................................................................................ 11

14 4.3.1 General provision .......................................................................................... 11

15 4.3.2 Voltmeter ....................................................................................................... 11

16 4.3.3 Data acquisition unit ...................................................................................... 12

17 4.4 Sensor .................................................................................................................. 12

18 4.4.1 Sampling resistor ........................................................................................... 12

19 4.4.2 Current transformer ....................................................................................... 12

20 4.5 Other description .................................................................................................. 12

21 4.5.1 Intermediate connector .................................................................................. 12

22 4.5.2 Thermostat .................................................................................................... 13

23 5 Sample .......................................................................................................................... 13

24 5.1 Magnetic core ....................................................................................................... 13

25 5.2 Winding ................................................................................................................ 13

26 5.2.1 Winding condition .......................................................................................... 13

27 5.2.2 Dual winding .................................................................................................. 13

28 5.2.3 Single winding ............................................................................................... 13

29 5.3 Mounting of sample ............................................................................................... 14

30 5.4 Parameters of samle ............................................................................................. 14

31 6 Measuring condition ...................................................................................................... 14

32 6.1 Relation to practice ............................................................................................... 14

33 6.2 Effective parameters ............................................................................................. 15

34 6.3 Magnetic state of measurement ............................................................................ 15

35 7 Test methods for the power loss .................................................................................... 15

36 7.1 Summary .............................................................................................................. 15

37 7.2 AC power method ................................................................................................. 16

38 7.3 DC power method ................................................................................................. 16

39 7.4 Calorimetric method .............................................................................................. 16

40 8 Test methods for effective permeability ......................................................................... 16

41 8.1 Summary .............................................................................................................. 16

42 8.2 Large signal AC method ........................................................................................ 17

43 8.3 Impedance method ............................................................................................... 17

44 8.4 Pulse method ........................................................................................................ 17

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45 9 Test method for effective complex permeability ............................................................. 17

46 10 Test method for quality factor (Q) .................................................................................. 17

47 11 Verification of measurement accuracy ........................................................................... 17

48 Annex A (informative) AC power method ............................................................................. 18

49 A.1 Overview .............................................................................................................. 18

50 A.2 Basic circuit diagram ............................................................................................. 18

51 A.3 Measuring device .................................................................................................. 18

52 A.3.1 High frequency excitation source ................................................................... 18

53 A.3.2 Exciting winding N1 and voltage sensing winding N2 ...................................... 18

54 A.3.3 Sampling resistor R ....................................................................................... 19

55 A.3.4 Data collector ................................................................................................ 19

56 A.4 Test steps ............................................................................................................. 19

57 A.5 Measuring principle ............................................................................................... 19

58 A.6 Error Analysis ....................................................................................................... 20

59 A.7 Matters needing attention ..................................................................................... 20

60 A.7.1 Measurement error ........................................................................................ 20

61 A.7.2 Deduction of the winding loss ........................................................................ 20

62 A.8 Specific test methods ............................................................................................ 20

63 A.8.1 B-H analyzer method ..................................................................................... 20

64 A.8.2 Power analyzer method ................................................................................. 20

65 A.8.3 Capacitive reactive compensation method ..................................................... 21

66 A.9 Measurement for quality factor (Q) ........................................................................ 22

67 Annex B (informative) DC power method ............................................................................. 23

68 B.1 Overview .............................................................................................................. 23

69 B.2 Basic circuit diagram ............................................................................................. 23

70 B.3 Measuring device .................................................................................................. 23

71 B.3.1 DC voltage source Ui ..................................................................................... 23

72 B.3.2 DC/AC Inverter .............................................................................................. 23

73 B.3.3 Exciting winding N ....................................................................................... 23

74 B.3.4 DC ammeter and DC voltmeter for measuring the average value ................... 23

75 B.4 Test steps ............................................................................................................. 23

76 B.5 Measuring principle ............................................................................................... 24

77 B.6 Matters needing attention ..................................................................................... 24

78 B.6.1 Inverter loss .................................................................................................. 24

79 B.6.2 Deduction of winding loss .............................................................................. 24

80 Annex C (informative) Calorimetric method .......................................................................... 25

81 C.1 Overview .............................................................................................................. 25

82 C.2 Basic circuit diagram ............................................................................................. 25

83 C.3 Measuring device .................................................................................................. 25

84 C.3.1 Excitation source ........................................................................................... 25

85 C.3.2 Temperature sensor ...................................................................................... 25

86 C.3.3 Thermal insulated container ........................................................................... 25

87 C.3.4 Thermal medium ............................................................................................ 25

88 C.3.5 Sample .......................................................................................................... 26

89 C.4 Test steps ............................................................................................................. 26

90 C.5 Measuring principle ............................................................................................... 26

91 C.6 Matters needing attention ..................................................................................... 26

92 C.7 Specific test methods ............................................................................................ 27

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93 C.7.1 Calibration calorimetric method ..................................................................... 27

94 C.7.2 Comparative calorimetric method ................................................................... 28

95 Annex D (informative) Large signal AC method .................................................................... 30

96 D.1 Overview .............................................................................................................. 30

97 D.2 Basic circuit diagram ............................................................................................. 30

98 D.3 Measuring device .................................................................................................. 30

99 D.3.1 High-frequency excitation source ................................................................... 30

100 D.3.2 Exciting winding N and voltage sensing winding N ..................................... 31

1 2

101 D.3.3 Sampling resistor R ....................................................................................... 31

102 D.3.4 Data collector ................................................................................................ 31

103 D.4 Test steps ............................................................................................................. 31

104 D.5 Measuring principle ............................................................................................... 31

105 D.6 Matters needing attention ..................................................................................... 31

106 Annex E (informative) Impedance method ............................................................................ 33

107 E.1 Overview .............................................................................................................. 33

108 E.2 Basic circuit diagram ............................................................................................. 33

109 E.3 Measuring device .................................................................................................. 33

110 E.3.1 Impedance analyzer or LCR meter ................................................................. 33

111 E.3.2 Exciting winding N ....................................................................................... 33

112 E.4 Test steps ............................................................................................................. 33

113 E.5 Measuring principle ............................................................................................... 33

114 E.6 Matters needing attention ..................................................................................... 34

115 Annex F (informative) Pulse method .................................................................................... 35

116 F.1 Overview .............................................................................................................. 35

117 F.2 Basic circuit diagram ............................................................................................. 35

118 F.3 Measuring device .................................................................................................. 35

119 F.3.1 Sampling resistor R ....................................................................................... 35

120 F.3.2 Switch S ........................................................................................................ 35

121 F.3.3 Exciting winding N ....................................................................................... 35

122 F.3.4 Capacitor C ................................................................................................... 36

123 F.4 Test steps ............................................................................................................. 36

124 F.5 Measuring principle ............................................................................................... 36

125 F.6 Matters needing attention ..................................................................................... 37

126 Annex G (informative) The method of verification and the criteria for the judgment .............. 38

127 G.1 Overview .............................................................................................................. 38

128 Annex H (informative) Imposing of DC bias on the core ....................................................... 40

129 H.1 Overview .............................................................................................................. 40

130 H.2 Matters needing attention ..................................................................................... 40

131 Annex I (informative) References ......................................................................................... 42

132 I.1 Overview .............................................................................................................. 42

133 I.2 The effect of rise time of square wave excitation on the core loss ......................... 42

134 I.3 Phase error limit ................................................................................................... 43

135 I.4 Derivation of formula (8) ....................................................................................... 44

136 I.5 SRF consideration of the sample .......................................................................... 44

137

Figure 1 – Figure of square waveform ................................................................................... 11

138 Figure A.1 – Diagram of AC power method ........................................................................... 18

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139 Figure A.2 – Circuit diagram of reactive power compensation of capacitor ............................ 21

140 Figure A.3 – Phasor diagram of reactive power compensation of capacitor ........................... 22

141 Figure B.1 – Diagram of DC meter method ............................................................................ 23

142 Figure C.1 – Diagram of the calorimetric method .................................................................. 25

143 Figure C.2 – Diagram of the calibration calorimetric method ................................................. 27

144 Figure C.3 – Diagram of the comparative calorimetric method .............................................. 28

145 Figure D.1 – Diagram of large signal AC method .................................................................. 30

146 Figure E.1 – Diagram of impedance method ......................................................................... 33

147 Figure F.1 – Diagram of pulse method .................................................................................. 35

148 Figure F.2 – Exciting voltage and current waveform on the exciting winding ......................... 36

149 Figure G.1 – Diagram of air-core inductor ............................................................................. 38

150 Figure H.1 – Diagram of imposing of DC bias........................................................................ 40

151 Figure I.1 – Square wave excitation source ........................................................................... 43

152 Figure I.2 - Diagram of the ratio error and phase error .......................................................... 43

153 Figure I.3 - Equivalent circuit model of sample ...................................................................... 44

154 Table 1 – Comparisons of measuring method for power loss ................................................. 15

155 Table I.1 - Example k, α, β and other parameters .................................................................. 42

156 Table I.2 - Example core losses error with different tr ............................................................ 42

157 Table I.3 – Example: the core losses measuring error and ratio error for phase error ............ 43

158 Table I.4 – Example: ∆L at different frequencies ................................................................... 45

159
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oSIST prEN IEC 63300:2022
IEC CDV 63300 © IEC 2021 - 6 - 51/1401/CDV
160 INTERNATIONAL ELECTROTECHNICAL COMMISSION
161 ____________
162 TEST METHODS FOR ELECTRICAL AND MAGNETIC PROPERTIES OF
163 MAGNETIC POWDER CORES
164
165 FOREWORD

166 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

167 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

168 international co-operation on all questions concerning standardization in the electrical and electronic fields. To

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196 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

197 indispensable for the correct application of this publication.

198 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

199 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

200 IEC 63300 has been prepared by IEC technical committee 51: Magnetic components, ferrite

201 and magnetic powder materials. It is an international standard.
202 The text of this International Standard is based on the following documents:
FDIS Report on voting
51/XX/FDIS 51/XX/RVD

203 Full information on the voting for its approval can be found in the report on voting indicated in

204 the above table.

205 The language used for the development of this International Standard is English.

206 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

207 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,

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208 available at www.iec.ch/members_experts/refdocs. The main document types developed by

209 IEC are described in greater detail at www.iec.ch/standardsdev/publications.

210 The committee has decided that the contents of this document will remain unchanged until the stability

211 date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific

212 document. At this date, the document will be
213 • reconfirmed,
214 • withdrawn,
215 • replaced by a revised edition, or
216 • amended.
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217 INTRODUCTION

218 Magnetic powder cores have the characteristics of low relative permeability, high saturated

219 flux density and low loss. Therefore, compared with ungapped ferrite, the equivalent

220 impedance of a sample of the magnetic powder core is much smaller, and the magnetizing

221 current is very large, so the required excitation source needs both high frequency and high-

222 power capacity, which is difficult to obtain in practice. Moreover, the impedance angle of a

223 magnetic powder core under test is very close to 90°, and this results in great difficulties to

224 obtain accurate measurements of power loss.

225 The IEC 62044 standard series provides measuring methods of magnetic properties at low

226 and high excitation levels for magnetic cores made of magnetic oxides or metallic powders.

227 However, the methods introduced in IEC 62044 cannot fully meet the measurement

228 requirements for magnetic properties of magnetic powder cores. So, it is necessary to have a

229 standard for suitable measuring methods for the magnetic properties of magnetic powder

230 cores.

231 New test methods with pulse wave excitation and DC power method that account for the

232 characteristics of magnetic power cores are introduced in this standard, in addition to some

233 modifications for the traditional test methods. Also, ideally an air core inductor with single

234 winding or dual windings is introduced in the standard to verify or calibrate the accuracy of

235 test methods for magnetic properties of magnetic powder cores, because of the linear

236 properties of an air core inductor.
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237 TEST METHODS FOR ELECTRICAL AND MAGNETIC PROPERTIES OF
238 MAGNETIC POWDER CORES
239 1 Scope

240 This standard provides the test methods for the electrical and magnetic properties of magnetic

241 powder cores used for inductive components in electronics equipment, switch-mode power

242 supplies and power conversion equipment, and introduces measuring principles, scope of

243 application and matters needing attention for each method.
244 The para
...

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