Determination of the Measurement Uncertainty of Direct and Indirect Efficiency Measurement Methods in Permanent Magnet Synchronous Machines

The use of permanent magnet synchronous machines to achieve high performance and high efficiency in the modern motor and generator industries has increased rapidly in recent years. The existing efficiency determining methods and standards do not however consider measurement uncertainties during loss and efficiency calculations of such machines. In this paper, the determination of the efficiency of permanent magnet synchronous machines using direct and indirect methods is presented and the measurement uncertainty is determined using the software called GUM Workbench “Guide to the Expression of Uncertainty in Measurement” while assessing the results of efficiency measurements.

[1]  Ramdane Lateb,et al.  Indirect testing to determine losses of high speed synchronous permanent magnets motors , 2014, 2014 17th International Conference on Electrical Machines and Systems (ICEMS).

[2]  Andreas Binder,et al.  Determination of efficiency of permanent magnet synchronous machines from summation of losses , 2014, 2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion.

[3]  Pragasen Pillay,et al.  Evaluation of measurement uncertainty in induction machines efficiency estimation , 2014, 2014 IEEE International Conference on Power and Energy (PECon).

[4]  L. Aarniovuori,et al.  Uncertainty in motor efficiency measurements , 2014, 2014 International Conference on Electrical Machines (ICEM).

[5]  A.T. de Almeida,et al.  Comparative analysis of IEEE 112-B and IEC 34-2 efficiency testing standards using stray load losses in low voltage three-phase, cage induction motors , 2001, 2001 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.01CH37226).

[6]  Chetan S. Gajjar,et al.  Analysis of a Nonintrusive Efficiency Estimation Technique for Induction Machines Compared to the IEEE 112B and IEC 34-2-1 Standards , 2015, IEEE Transactions on Industry Applications.

[7]  K. Sommer,et al.  Systematic approach to the modelling of measurements for uncertainty evaluation , 2006 .

[8]  C. S. Gajjar,et al.  Analysis of non-intrusive efficiency estimation of induction machines compared to the IEEE 112B and IEC 34-2-1 standards , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[9]  Giovanni Bucci,et al.  Uncertainty Issues in Direct and Indirect Efficiency Determination for Three-Phase Induction Motors: Remarks About the IEC 60034-2-1 Standard , 2016, IEEE Transactions on Instrumentation and Measurement.