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BS EN IEC 60034-2-3:2020

BS EN IEC 60034-2-3:2020

$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 2020 34
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IEC 60034-2-3:2020 specifies test methods and an interpolation procedure for determining losses and efficiencies of converter-fed motors within the scope of IEC 60034-1:2017. The motor is then part of a variable frequency power drive system (PDS) as defined in IEC 61800?9?2:2017. Applying the approach of the comparable converter, the motor efficiency determined by use of this document is applicable for comparison of different motor designs only. The document also specifies procedures to determine motor losses at any load point (torque, speed) within the base speed range (constant torque range, constant flux 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 60034-1:2017 for operation on a variable frequency and variable voltage power supply.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 INTRODUCTION
13 1 Scope
2 Normative references
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 Testing with converters with rated voltages above 1 kV
5.2.4 Testing with other converters
6 Test method for the determination of the efficiency of converter-fed motors
6.1 Selection of determination method
Tables
Table 1 – Preferred test methods
18 6.2 Method 2-3-A – Direct measurement of input and output
6.2.1 Test set-up
6.2.2 Test procedure
6.2.3 Efficiency determination
Table 2 – Other test methods
19 6.2.4 Measurement at seven standardized operating points
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
20 6.3.4 Efficiency determination
6.4 2-3-C – Alternate Efficiency Determination Method (AEDM)
6.5 2-3-D – Determination of efficiency by calculation
21 7 Interpolation of losses at any operating point
7.1 General
7.2 Interpolation procedure
7.3 Analytical determination of relative losses at any operating point
22 Figure 1 – Standardized operating points
Table 3 – Normative operating points
23 7.4 Additional losses due to frequency converter voltage drop
7.5 Alternate operating points to determine interpolation coefficients
24 7.6 Optional determination of interpolation error
Table 4 – Non-normative alternate operating points
26 Annex A (informative)Losses of AC motors
A.1 General
A.2 Stator and rotor winding I2R losses PLSR (PLS + PLR)
A.3 Iron losses (PLfe)
27 A.4 Additional load losses (PLL)
A.5 Friction and windage losses (PLfw)
Table A.1 – Recommended split of windage and friction losses for IC 411 self-ventilated motors
28 A.6 Additional high frequency losses (PLHL)
29 Annex B (informative)Exemplary determination of losses and efficiencyat various load points
B.1 General
B.2 Determination of the interpolation coefficients
Table B.1 – Name plate data
Table B.2 – Reference values
30 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
31 Table B.5 – User-defined operating points
Table B.6 – Calculated losses for the user-defined operating points
32 Bibliography

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