EN IEC 60034-2-3:2024

SLOVENSKI STANDARD
oSIST prEN IEC 60034-2-3:2023
01-januar-2023
Električni rotacijski stroji - 2-3. del: Posebne preskusne metode za ugotavljanje
izgub in izkoristka motorja na izmenični tok, napajanega prek pretvornikov
Rotating electrical machines - Part 2-3: Specific test methods for determining losses and
efficiency of converter-fed AC motors
Drehende elektrische Maschinen – Teil 2-3: Besondere Verfahren zur Bestimmung der
Verluste und des Wirkungsgrades von umrichtergespeisten Wechselstrommaschinen
Machines électriques tournantes - Partie 2-3: Méthodes d'essai spécifiques pour la
détermination des pertes et du rendement des moteurs à courant alternatif alimentés par
convertisseur
Ta slovenski standard je istoveten z: prEN IEC 60034-2-3:2022
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
oSIST prEN IEC 60034-2-3:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 60034-2-3:2023
oSIST prEN IEC 60034-2-3:2023
2/2110/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60034-2-3 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-11-18 2023-02-10
SUPERSEDES DOCUMENTS:
2/2080/CD, 2/2096A/CC
IEC TC 2 : ROTATING MACHINERY
SECRETARIAT: SECRETARY:
United Kingdom Mr Charles Whitlock
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if any, in
this CDV to the secretary.
FUNCTIONS CONCERNED:
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Attention IEC-CENELEC parallel voting
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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
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This document is still under study and subject to change. It should not be used for reference purposes.
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TITLE:
Rotating electrical machines – Part 2-3: Specific test methods for determining losses and efficiency of
converter-fed AC motors
PROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:
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.

oSIST prEN IEC 60034-2-3:2023
– 2 – IEC CDV 60034-2-3 © IEC 2022
CONTENTS
CONTENTS . 1
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Symbols and abbreviated terms . 10
5 Basic requirements . 11
5.1 Instrumentation . 11
5.1.1 General . 11
5.1.2 Power analyser and transducers . 11
5.1.3 Mechanical output of the motor . 12
5.2 Converter set-up . 12
5.2.1 General . 12
5.2.2 Comparable converter set-up for rated voltages up to 1 kV . 12
5.2.3 Testing with converters with rated voltages above 1 kV . 13
5.2.4 Testing with other converters . 13
5.3 Ambient temperature during testing . 13
5.4 State of the machine under test . 13
6 Test method for the determination of the efficiency of converter-fed motors . 14
6.1 Selection of determination method . 14
6.2 Method 2-3-A – Direct measurement of input and output . 14
6.2.1 Test set-up . 14
6.2.2 Test procedure . 14
6.2.3 Efficiency determination. 15
6.2.4 Measurement at seven standardized operating points . 15
6.3 Method 2-3-B – Summation of losses with determination of additional high
frequency loss at converter supply at no-load operation . 16
6.3.1 General . 16
6.3.2 Test set-up . 16
6.3.3 Test procedure . 16
6.3.4 Efficiency determination. 16
6.4 2-3-C – Alternate Efficiency Determination Method (AEDM) . 17
6.5 2-3-D – Determination of efficiency by calculation . 17
7 Interpolation of motor losses at any operating point . 17
7.1 General . 17
7.2 Definitions. 18
7.3 Interpolation and extrapolation of relative losses at any operating point . 18
7.4 Determination of interpolation coefficients . 19
7.5 P to P are the measured losses in the points P to P relative to the
L1 L7 1 7
rated output power (rated speed and rated torque).Alternate operating points
to determine interpolation coefficients . 21
7.6 Optional determination of interpolation error . 22
Annex A (informative) Losses of AC motors . 23

oSIST prEN IEC 60034-2-3:2023
IEC CDV 60034-2-3 © IEC 2022 – 3 –
A.1 General . 23
A.2 Stator and rotor winding I R losses P (P + P ) . 23
LSR LS LR
A.3 Iron losses (P ) . 23
Lfe
A.4 Additional load losses (P ) . 24
LL
A.5 Friction and windage losses (P ) . 24
Lfw
A.6 Additional high frequency losses (P ) . 25
LHL
Annex B (informative) Exemplary determination of losses and efficiency at various
load points . 26
B.1 General . 26
B.2 Determination of the interpolation coefficients . 26
B.3 Calculation of losses and efficiency for certain operating points . 27
Bibliography . 32

Figure 1: Connection Y or D, Ranges a and b . 29
Figure 2: Connection Y ► D, Ranges a and b . 29
Figure 3: Connection Y ► YY, Range a . 30
Figure 4 – Standardized operating points . 20

Table 1 – Preferred test methods . 14
Table 2 – Other test methods . 14
Table 3 – Normative operating points . 19
Table 4 – Non-normative alternate operating points . 21
Table A.1 – Recommended split of windage and friction losses for IC 411 self-

ventilated motors . 24
Table B.1 – Name plate data . 26
Table B.2 – Reference values . 26
Table B.3 – Losses for the 7 operating points . 27
Table B.4 – Interpolation coefficients . 27
Table B.5 – User-defined operating points . 28
Table B.6 – Calculated losses for the user-defined operating points . 28

oSIST prEN IEC 60034-2-3:2023
– 4 – IEC CDV 60034-2-3 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –

Part 2-3: Specific test methods for determining losses and
efficiency of converter-fed AC motors

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