References:

[1] P. Pillay, K. A. Fendley, "The contribution of energy efficient motors to demand and energy savings in the petrochemical industry," IEEE Trans. Power Syst., vol. 10, pp. 1085–1093, May 1995.
[2] H.R.776, Energy Policy Act of 1992, sec. 122. "Energy conservation requirements for certain commercial and industrial equipment, energy conservation standards for high-intensity discharge lamps, distribution transformers, and small electric motors" [online], Available: http://thomas.loc.gov
[3] U. S. DOE Energy Efficiency and Renewable Energy (EERE), DOE Industry Tools. DOE Motor Master+ Website, [Online], Available: http://www1.eere.energy.gov/industry /bestpractices/software.html
[4] Ching-Yin Lee, Bin-Kwie Chen, Wei-Jen Lee, Yen-Feng Hsu, "Effects of various unbalanced voltages on the operation performance of an induction motor under the same voltage unbalance factor condition," in Proc. IEEE Technical Conf. on Industrial and Commercial Power Systems, 1997, pp. 51-59.
[5] P. Pillay, P. Hofmann, M. Manyage, "Derating of induction motors operating with a combination of unbalanced voltages and over or under voltages," IEEE Trans. Energy Convers., vol. 17, no. 4, pp. 485- 491, Dec 2002.
[6] H. M. Mzungu, P. Barendse, M. A. Khan and M. Manyage, "Determination of effects on induction motor efficiency", ICUE Conference, South Africa, Cape Town, May 2008.
[7] H. M. Mzungu, M. J. Manyage, M. A. Khan, P. Barendse, T. L. Mthombeni,; P. Pillay, "Application of induction machine efficiency testing standards in South Africa," in Proc. IEEE Int. Conf Electric Machines and Drives , 2009. pp. 1455-1462.
[8] " IEEE Standard Test Procedure for Polyphase Induction Motors and Generators", IEEE Standard 112, 2004.
[9] NEMA standard Publication MG1-1987
[10] A. Siddique, G. S. Yadava, B. Singh "Effects of voltage unbalance on induction motors," in Proc. IEEE Int. Symposium. Electrical Insulation, 2004, pp. 26- 29
[11] Ching-Yin Lee, "Effects of unbalanced voltage on the operation performance of a three-phase induction motor," IEEE Trans. Energy Conversion, vol. 14, no. 2, pp. 202-208, Jun 1999
[12] J. S. Hsu, J. D. Kueck, M. Olszewski, D. A. Casada, P. J. Otaduy, L. M. Tolbert, "Comparison of induction motor field efficiency evaluation methods, " IEEE Tran. Ind. Appl., vol. 34, no. 1, pp. 117-125, Feb. 1998.
[13] F. Ferreira, A. T. de Almeida, "Considerations on in-field induction motor load estimation methods", in Proc. IEEE Int. Conf. Electrical Machines, 2008, pp. 1-8.
[14] J. R. Holmquist, J. A. Rooks, M. E. Richter, "Practical approach for determining motor efficiency in the field using calculated and measured values," IEEE Trans. Ind. Appl., vol. 40, no. 1, pp. 242- 248, Feb. 2004
[15] Bin Lu, T. G. Habetler, R. G. Harley, "A survey of efficiency-estimation methods for in-service induction motors," IEEE Tran. Ind. Appl., vol. 42, no. 4, pp. 924-933, Aug. 2006.
[16] J. D. Kueck, M. Olszewski, D. A. Casada, J. Hsu, P. J. Otaduy, and L. M. Tolbert, “Assessment of methods for estimating motor efficiency, and load under field conditions,” Oak Ridge National Laboratory Rep., ORNL/ TM-13165, pp. 1- 47, 1996.
[17] Y. El-Ibiary, "An accurate low-cost method for determining electric motors' efficiency for the purpose of plant energy management," IEEE Tran. Ind. Appl., vol. 39, no. 4, pp. 1205- 1210, Aug. 2003.
[18] "In-plant electric motor loading and efficiency techniques," Ontario Hydro Rep., TSDD-90-043, 1990.
[19] J. S. Hsu, B. P. Scoggins, "Field test of motor efficiency and load changes through air-gap torque," IEEE Trans. Energy Convers., vol. 10, no. 3, pp. 477-483, Sep. 1995.
[20] J. S. Hsu, P. L. Sorenson, "Field assessment of induction motor efficiency through air-gap torque," IEEE Trans. Energy Convers., vol. 11, no. 3, pp. 489-494, Sep. 1996.
[21] Bin Lu, T. G. Habetler, R. G. Harley, "A nonintrusive and in-service motor-efficiency estimation method using air-gap torque with considerations of condition monitoring," IEEE Trans. Ind. Appl., vol. 44, no. 6, pp. 1666-1674, Dec. 2008
[22] P. Pillay, V. Levin, P. Otaduy, J. Kueck, "In situ induction motor efficiency determination using the genetic algorithm," IEEE Trans. Energy Convers., vol. 13, no. 4, pp. 326-333, Dec 1998.
[23] A. Charette, J. Xu, A. Ba-Razzouk, P. Pillay, V. Rajagopalan, "The use of the genetic algorithm for in situ efficiency measurement of an induction motor," in Conf. Rec. IEEE Power Engineering Society Winter Meeting, 2000, pp. 392-397.
[24] T. Phumiphak, C. Chat-uthai, "Estimation of induction motor parameters based on field test coupled with genetic algorithm," in Proc. IEEE Int. Conf. Power System Technology, 2002, pp. 1199- 120.
[25] M. S. Aspalli, S. B. Shetagar, S. F. Kodad, "Estimation of induction motor field efficiency for energy audit and management using genetic algorithm," in Proc. Int. Conf. Sensing Technology, 2008, pp. 440-445
[26] T. Phumiphak, C. Chat-uthai, "An economical method for induction motor field efficiency estimation for use in on-site energy audit and management," in Proc. IEEE Int. Conf. Power System Technology, 2004, pp. 1250- 1254.
[27] Bin Lu, Cao Wenping; I. French, K. J. Bradley, T. G. Habetler, "Non-intrusive efficiency determination of in-service induction motors using genetic algorithm and air-gap torque methods," in Conf. Rec. IEEE 42nd IAS Annual Meeting, 2007, pp. 1186-1192.
[28] M. Cunkas, T. Sag, “Efficiency determination of induction motors using multi-objective evolutionary algorithms”, Elsevier J. Advances in Engineering Software, vol. 41, pp. 255-261, Feb. 2010.
[29] V. P. Sakthivel, R. Bhuvaneswari, S. Subramanian, "Non-intrusive efficiency estimation method for energy auditing and management of in-service induction motor using bacterial foraging algorithm," IET Electr. Power Appl.,vol.4, pp.579-590, Sept. 2010.
[30] E. B. Agamloh, A. K.Wallace, A. von Jouanne, K. J. Anderson, J. A. Rooks, "Assessment of nonintrusive motor efficiency estimators," IEEE Tran. Ind. Appl., vol. 41, no. 1, pp. 127- 133, Jan.-Feb. 2005
[31] P. Pillay, P. Hofmann, M. Manyage, "Derating of induction motors operating with a combination of unbalanced voltages and over or undervoltages," IEEE Trans. Energy Convers., vol.17, no. 4, pp. 485- 491, Dec. 2002.
[32] J. Faiz, H. Ebrahimpour, P. Pillay, "Influence of unbalanced voltage on the steady-state performance of a three-phase squirrel-cage induction motor," IEEE Trans. Energy Convers., vol.19, no. 4, pp. 657- 662, Dec. 2004
[33] Yaw-Juen Wang, "Analysis of effects of three-phase voltage unbalance on induction motors with emphasis on the angle of the complex voltage unbalance factor," IEEE Trans. Energy Convers., vol.16, no. 3, pp.270-275, Sep 2001
[34] M. Anwari, A. Hiendro, "New unbalance factor for estimating performance of a three-phase induction motor with under- and overvoltage unbalance," IEEE Trans. Energy Convers., vol.25, no. 3, pp.619-625, Sept. 2010
[35] P. Gnacinski, " Derating of an induction machine under voltage unbalance combined with over or undervoltages", Elsevier J. Energy Conversion and Management, 2009, vol. 50, pp. 1101-1107
[36] P. Pillay, M. Manyage, "Loss of life in induction machines operating with unbalanced supplies," IEEE Trans. Energy Convers., vol. 21, no. 4, pp. 813-822, Dec. 2006.
[37] J. R. Gomez, E. C. Quispe, M. A. de Armas, P. R. Viego, "Estimation of induction motor efficiency in situ under unbalanced voltages using genetic algorithms," in Proc. IEEE Int. Conf. Electrical Machines, 2008, pp. 1-4.
[38] F. Waldhart, J. P. Bache, "Online efficiency determination of three phase asynchronous machines by start-up data," in Proc. IEEE Int. Conf. Diagnostics for Electric Machines, Power Electronics and Drives, 2009, pp. 1-6.
[39] C. Grantham, H. Tabatanaei-Yazdi, M.F. Rahman, "A novel method for rapid efficiency measurement of three phase induction motors," IEEE Trans. Energy Convers., vol. 14, no. 4, pp. 1236-1240, Dec 1999
[40] D. J. McKinnon, C. Grantham, "Improved efficiency test methods for three-phase induction machines," in Conf. Rec. IEEE 40th IAS Annual Meeting, 2005 , pp. 466- 473.
[41] A. K. Ziarani, "Extraction of Non-stationary Sinusoids", Ph.D. thesis, University of Toronto, Toronto, Canada, 2002.
[42] A. Gharakhani Siraki, P. Pillay, "A novel evolutionary based in-situ efficiency estimation technique for induction machines working with unbalanced supplies," in Conf. Rec. IEEE Electric Machines & Drives, 2011, pp. 1563-1568
[43] A. Siraki, P. Pillay, "An in situ efficiency estimation technique for induction machines working with unbalanced supplies," IEEE Trans. Energy Convers., vol. 27, no. 1, pp. 85-95, March 2012
[44] A. Gharakhani Siraki, C. Gajjar, M.A. Khan, P. Barendse, P. Pillay, "An algorithm for non-intrusive in-situ efficiency estimation of induction machines operating with unbalanced supply conditions", IEEE Tran. Ind. Appl., vol. 48, no. 6, Nov/Dec 2012.
[45] A. Gharakhani Siraki, P. Pillay, “Comparison of two methods for full load in situ induction machine efficiency estimation from field testing in the presence of over/under voltages and unbalanced supplies", IEEE Tran. Ind. Appl., vol. 48, no. 6, Nov/Dec 2012.
[46] A. Gharakhani Siraki, P. Pillay, “Full load efficiency estimation of refurbished induction machines from no load test", submitted to IEEE Tran. Energy Convers.
[47] R. Naidoo, "A nonlinear adaptive filter for improved operation and protection of power systems ", Ph.D. thesis, University of Cape Town, Cape Town, South Africa, 2008.
[48] H. Douglas, P. Pillay, A.K. Ziarani, "A new algorithm for transient motor current signature analysis using wavelets," IEEE Trans. Ind. Appl., vol. 40, no. 5, pp. 1361- 1368, Oct. 2004.
[49] P. S. Barendse, P. Pillay, "A new algorithm for the detection of faults in permanent magnet machines," in Proc. IEEE Int. Conf. Industrial Electronics, 2006, pp. 823-828.
[50] B. W. Williams, J. K. Goodfellow, T. C. Green, "Sensorless speed measurement of inverter driven squirrel cage induction motors," in Proc. IEEE Int. Conf. Power Electronics and Variable-Speed Drives, 1991, pp. 297-300
[51] P. Pillay, Z. Xu, "Labview implementation of speed detection for mains-fed motors using motor current signature analysis," IEEE Power Eng. Review, vol. 18, pp. 47- 48, June 1998.
[52] K. D. Hurst, T.G. Habetler, " Sensorless speed measurement using current harmonic spectral estimation in induction machine drives " IEEE Trans. Power Electronics, vol. 11, no. 1, pp. 66-73, Jan 1996.
[53] S. E. Zocholl, E. O. Schweitzer, A. Aliaga-Zegarra, "Thermal protection of induction motors enhanced by interactive electrical and thermal models," IEEE Trans. Power App. and Syst., vol. PER-4, no. 7, pp. 1749-1755, July 1984
[54] J. S. Hsu, J. D. Kueck, M. Olszewski, D. A. Casada, P. J. Otaduy, L. M.Tolbert, "Comparison of induction motor field efficiency evaluation methods ," in Conf. Rec. IEEE Ind. Appl. Annual Meeting, 1996, pp. 703-712
[55] A. E. Eiben, J. E. Smith, “Introduction to evolutionary computing”, Natural Computing Series, 2nd printing, New York: Springer-Verlag, 2007, ch. 3.
[56] Bin Lu, Cao Wenping, T. G. Habetler, "Error analysis of motor-efficiency estimation and measurement," in Conf. Rec. IEEE Power Electronics Specialists, 2007, pp. 612-618.
[57] B. Herndler, P. Barendse, M. A. Khan, "Considerations for improving the non-intrusive efficiency estimation of induction machines using the air gap torque method," in Conf. Rec. IEEE Electric Machines & Drives, 2011, pp. 1516-1521.
[58] B. L. Herndler, “Non-intrusive efficiency estimation of induction machines,” M.S. thesis, Dept. Elect. Eng., Cape Town Univ., Cape Town, South Africa, 2010.
[59] IEC 60034-2 International Standard, Rotating electrical machines – Part 2: “Standard methods for determining losses and efficiency from tests (excluding machines for traction vehicles)”, IEC, Geneva, Switzerland, 2007.