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BS EN IEC 60034-2-3:2024

BS EN IEC 60034-2-3:2024

$167.15

Rotating electrical machines – Specific test methods for determining losses and efficiency of converter-fed AC motors

Published By Publication Date Number of Pages
BSI 2024 40
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IEC 60034-2-3:2024 specifies test methods and an interpolation procedure for determining losses and efficiencies of converter-fed motors. The motor is then part of a variable frequency power drive system (PDS) as defined in IEC 61800‑9‑2. This document also specifies procedures to determine motor losses at any load point (torque, speed) within the constant flux range (constant torque range, base speed range), the field weakening range and the overload range based on determination of losses at seven standardized load points. This procedure is applicable to any variable speed AC motor (induction and synchronous) rated according to IEC 60034-1 for operation on a variable frequency and variable voltage power supply. This second edition cancels and replaces the first edition of IEC 60034-2-3 published in 2020. This edition includes the following significant technical changes with respect to the previous edition: – Harmonization of requirements and procedures with IEC 60034-2-1. – Extension of the interpolation procedure to the field weakening range.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 English
CONTENTS
8 FOREWORD
10 INTRODUCTION
12 1 Scope
2 Normative references
13 3 Terms and definitions
14 4 Symbols and abbreviated terms
15 5 Basic requirements
5.1 Instrumentation
5.1.1 General
5.1.2 Power analyser and transducers
16 5.1.3 Mechanical output of the motor
5.2 Converter set-up
5.2.1 General
5.2.2 Comparable converter set-up for rated voltages up to 1 kV
17 5.2.3 Converters with rated voltages above 1 kV
5.2.4 Testing with other converters
5.3 Ambient temperature during testing
5.4 State of the motor under test
18 6 Test method for the determination of the efficiency of converter-fed motors
6.1 Selection of determination method
6.2 Method 2-3-A – Direct measurement of input and output
6.2.1 Test set-up
6.2.2 Test procedure
Tables
Table 1 – Preferred test methods
Table 2 – Other test methods
19 6.2.3 Efficiency determination
6.2.4 Measurement at seven standardized operating points
20 6.3 Method 2-3-B – Summation of losses with determination of additional high frequency loss at converter supply at no-load operation
6.3.1 General
6.3.2 Test set-up
6.3.3 Test procedure
6.3.4 Efficiency determination
21 6.4 Method 2-3-C – Alternate Efficiency Determination Method (AEDM)
6.5 Method 2-3-D – Determination of efficiency by calculation
7 Interpolation of motor losses at any operating point
7.1 General
22 7.2 Definitions
7.3 Interpolation and extrapolation of relative losses at any operating point
23 7.4 Determination of interpolation coefficients
7.4.1 General
24 7.4.2 Analytical determination
Figures
Figure 1 – Standardized operating points
Table 3 – Normative operating points
25 7.4.3 Numerical determination
7.5 Alternate operating points to determine interpolation coefficients
26 Table 4 – Non-normative alternate operating points
27 7.6 Optional determination of interpolation error
28 Annex A (informative) Losses of AC motors
A.1 General
A.2 Stator and rotor winding I2R losses PLSR (PLS + PLR)
29 A.3 Iron losses (PLfe)
A.4 Additional load losses (PLL)
A.5 Friction and windage losses (PLfw)
30 A.6 Additional high frequency losses (PLHL)
Table A.1 – Recommended split of windage and friction losses for IC 411 self-ventilated motors
31 Annex B (informative) Exemplary determination of losses and efficiency at various load points
B.1 General
B.2 Determination of the interpolation coefficients
Table B.1 – Name plate data
Table B.2 – Reference values
32 B.3 Calculation of losses and efficiency for certain operating points
Table B.3 – Losses for the 7 operating points
Table B.4 – Interpolation coefficients
33 Table B.5 – User-defined operating points
Table B.6 – Calculated losses for the user-defined operating points
34 Annex C (informative) Loss interpolation for different winding connections
Figure C.1 – Connection Y or D, ranges a and b
35 Figure C.2 – Connection Y ► D, ranges a and b
Figure C.3 – Connection Y ► YY, range a
36 Annex D (informative) Examples for additional load points for the numerical interpolation procedure
Figure D.1 – Example for additional load points mainly in the over speed area
37 Figure D.2 – Example for additional load points in the overload and over speed area
38 Bibliography

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BS EN IEC 60034-2-3:2024
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