Y. K. Huang, K. P. Li and Q. S. Hu, “Research on Computational Model of Iron Losses in SPWM Fed Induction Motors,” Proceedings of the Eighth International Conference on Electrical Machines and Systems, 2005, 2002-2004.
 R. M. Fang, “An Improved Iron Loss Calculation Method for High-speed Induction,” Proceedings of the Eighth International Conference on Electrical Machines and Systems, 2005, 886888.
 W. J. Yin, V. Bultemeier, D. Barta, etc., Critical Factors for Early Failure of Magnet Wires in Inverter Fed Motor, In: Proceedings of the 8th Conference on Electrical Insulation and Dielectric Phenomena, Virginia Beach, USA : 1995, pp. 258-261.
 D. N. Da, Testing and Rating of Transformers for Use with Non-Liner Loads. Under Writers Laboratories Inc., Northbrook, 1992.
 W. M. Grady, et al, Power Factor Correction and Power System Harmonic,” Short course, New Mexico State University, 1993.
 L. S. Tong and G. N. Wu, “Impact on Frequency Control System of Traction Motor Harmonic Losses,” Proceeding of Power system and its automation, Vol. 17, No. 6, 2005, pp. 10-13.
 Y. Yan and M. F. Dou, “Research on Power Harmonic of High Power Density Motor With VVVF Inverter-driven Asynchronous,” Electric Machines and Control, 2006, No. 1, p. 4952.
 X. L. He, “Higher Harmonic and Skin Effect of Variable Frequency Motor Heating,” Motor Technology, 2003, Vol. 3, p. 1416.
 F. Q. Li and J. X. Ren, “Application of Energy-saving Inverter Technology in Power Plants Pump and Fan Systems Analysis,” Shanghai University of Electric Power, Vol. 21, No. 1, 2005, pp. 17-20.