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\u20119\u20112. 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.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4 Symbols and abbreviated terms <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5 Basic requirements 5.1 Instrumentation 5.1.1 General 5.1.2 Power analyser and transducers <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 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 \u2013 Direct measurement of input and output 6.2.1 Test set-up 6.2.2 Test procedure Tables Table 1 \u2013 Preferred test methods Table 2 \u2013 Other test methods <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6.2.3 Efficiency determination 6.2.4 Measurement at seven standardized operating points <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6.3 Method 2-3-B \u2013 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 <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 6.4 Method 2-3-C \u2013 Alternate Efficiency Determination Method (AEDM) 6.5 Method 2-3-D \u2013 Determination of efficiency by calculation 7 Interpolation of motor losses at any operating point 7.1 General <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 7.2 Definitions 7.3 Interpolation and extrapolation of relative losses at any operating point <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 7.4 Determination of interpolation coefficients 7.4.1 General <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 7.4.2 Analytical determination Figures Figure 1 \u2013 Standardized operating points Table 3 \u2013 Normative operating points <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 7.4.3 Numerical determination 7.5 Alternate operating points to determine interpolation coefficients <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Table 4 \u2013 Non-normative alternate operating points <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 7.6 Optional determination of interpolation error <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Annex A (informative) Losses of AC motors A.1 General A.2 Stator and rotor winding I2R losses PLSR (PLS + PLR) <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | A.3 Iron losses (PLfe) A.4 Additional load losses (PLL) A.5 Friction and windage losses (PLfw) <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | A.6 Additional high frequency losses (PLHL) Table A.1 \u2013 Recommended split of windage and friction losses for IC 411 self-ventilated motors <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 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 \u2013 Name plate data Table B.2 \u2013 Reference values <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | B.3 Calculation of losses and efficiency for certain operating points Table B.3 \u2013 Losses for the 7 operating points Table B.4 \u2013 Interpolation coefficients <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Table B.5 \u2013 User-defined operating points Table B.6 \u2013 Calculated losses for the user-defined operating points <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Annex C (informative) Loss interpolation for different winding connections Figure C.1 \u2013 Connection Y or D, ranges a and b <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Figure C.2 \u2013 Connection Y \u25ba D, ranges a and b Figure C.3 \u2013 Connection Y \u25ba YY, range a <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Annex D (informative) Examples for additional load points for the numerical interpolation procedure Figure D.1 \u2013 Example for additional load points mainly in the over speed area <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Figure D.2 \u2013 Example for additional load points in the overload and over speed area <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Rotating electrical machines – Specific test methods for determining losses and efficiency of converter-fed AC motors<\/b><\/p>\n |