Scientific Journal

Applied Aspects of Information Technology

FIELD WEAKENING CONTROL FOR INDUCTION MOTORS BASED ON COPPER AND IRON LOSSES MINIMIZATION
Abstract:
This paper is concerned with the analysis of losses in induction motors. The most significant have been chose for minimization. These are in particular the losses in the windings and in the magnetic circuit due to eddy currents and hysteresis. Equations for the rotor flux linkage and orthogonal components of the stator current in the rotor reference frame dq in the induction motor’s vector control system based on the condition of minimizing the total losses in copper and motor steel in the steady state. Here, effects of steel saturation are not taken into account. The limit values of the torque and speed are determined, where the rotor flux linkage control can improve the energy characteristics of the drive outside the magnetic saturation. It is shown that the main difficulty in implementing energy-optimal control is that the rotor flux linkage operates not only energy parameters, but also speed regulation in the field-weakening region. A block diagram of the implementation of energy-optimal control with field weakening mode is proposed. The idea is to switch the control algorithms of the magnetic field of the motor in such a way that in the start-brake modes the rotor flux linkage changes in the speed reference function, and when operating at a steady speed, in the function of the torque. A comparative analysis for a typical and developed drive systems in field-weakening mode by the simulation is carried out. It is shown that with the same transients of the torque and speed in a typical system, the efficiency in steady-state decreases with a decrease of torque load torque, whereas the proposed system it remains unchanged. The change in efficiency in dynamic conditions occurs when the rotor flux linkage changes. With energy-optimal control, there is a slight increase in the stator current peaks when the torque load changes abruptly, but at low torque load an additional field-weakening leads to a decrease in the stator voltage, which carry on a decrease in electricity consumption.
Authors:
Keywords
DOI
10.15276/aait.02.2020.3
References
1. Diachenko, G. G. & Aziukovskyi, O. O. (2020). “Review of methods for energy-efficiency improvement in induction machines”, Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, No. 1, pp. 80-88. 
2. (2012). “Energy Efficiency Improvements in Electric Motors and Drives”. A. de Almeida, Bertoldi P. & Leonhard W. (eds.), Springer Science & Business Media, 511 p. 
3. Blanuša, B. D., Dokić, B. L. & Vukosavić, S. N. (2009). “Efficiency optimized control of high performance induction motor drive”, Electronics. Vol. 13, No. 2, pp. 8-13. 
4. Kioskeridis, I. & Margaris, N. (March 1996). “Simple efficiency maximise for an adjustable frequency induction motor”, IEEE Transactions on Power Electronics, Vol. 11, No. 2, pp. 213-219. 
5. Seena, T. & Rinu, A. K. (2013). “Efficiency optimization with improved transient performance of indirect vector controlled induction motor drive”, International Journal of advanced research in electrical, electronics and instrumentation engineering, Vol. 2, Special Issue 1, pp. 374-385. 
6. Borisevich, A. (2014). “Energy efficient control of an induction machine under torque load torque step change”, Journal of LATEX class files, Vol. 6, No. 1, 11 p. 
7. Sarhan, H. (2014). “Efficiency optimization of vector-controlled induction motor drive”, International Journal of Advances in Engineering & Technology, pp. 666-674. 
8. Sreejeth, M., Singh, M. & Kumar, P. (2012). “Efficiency optimization of vector controlled induction motor drive”, 38th Annual Conference on IEEE Industrial Electronics Society (IECON), pp. 1746- 1753. 
9. Kumar, K. R., Sakthibala, D. & Palaniswami, Dr. S. (2010). “Efficiency optimization of induction motor drive using soft computing techniques”, International Journal of Computer Applications, Vol. 3, No. 1, pp. 75-87. 
10. Borisevich, A. (2015). “Numerical method for power losses minimization of vector-controlled induction motor”, International Journal of Power Electronics and Drive System (IJPEDS), Vol. 6, No. 3, pp. 486-497. 
11. Chen, S. & Yeh, S. N. (1992). “Optimal Efficiency Analysis of Induction Motors Fed by Variable-Voltage and Variable-Frequency Source”, IEEE Trans. Energy Conversion, Vol. 7, No. 3. 
12. Kioskeridis, I. & Margaris, N. (March 1996). “Loss minimization in scalar-controlled induction motor drives with search controllers”, IEEE transaction on power electronics, Vol. 11, No. 2, pp. 213-220. 
13. Famouri, P. & Cathey, J. J. (1991). “Loss minimization control of an induction motor drives”, IEEE Transactions on Industry Applications, vol. 27, No. 1, pp. 32-37. 
14. Pryymak, B., Moreno-Eguilaz, J. M. & Peracaula, J. (2006). “Neural network flux optimization using a model of losses in induction motor drives," In 8th international conference on modelling and simulation f electric machines, converters and systems, Vol. 2, No. 12, pp. 650-662. 
15. Blanusa, B. (2010). “New Trends in Effic4iency Optimization of Induction Motor Drives,” New Trends in Technologies: Devices, Computer, Communication and Industrial Systems, Meng Joo Er (Ed.), InTech.
16. Sreejeth, M., Singh, M. & Kumar, P. (2012). “Efficiency optimization of vector controlled induction motor drive”, 38th Annual Conference on IEEE Industrial Electronics Society (IECON), pp. 1746-1753. 
17. Chornyj, O. P., Tolochko, O. I. & Tytjuk, V. К. (2016). “Matematychni modeli ta osoblyvosti chyselnyh rozrahunkiv dynamiky elektropryvodiv z asynhronnymy dvygunamy: monografija”. [Mathematical models and features of numerical calculations of dynamics of electric drives with induction motors: monograph], Kremenchuk, Ukraine, 299 p. 
18. Tolochko, O., Kaluhin, D. & Danylov, D. (2019). “Speed Vector Control of Induction Motor with Copper and Iron Losses Minimization”, IEEE 2nd Ukraine Conference on Electrical and Computer Engineering UkrCon, Lviv, Ukraine, July 2-6, 2019, pp. 408-413. DOI: 10.1109/UKRCON. 
19. Vinogradov, A. B. (2008). “Vektornoe upravlenie elektroprivodami peremennogo toka". [Vector control of AC drives], Ivanovo, Russian Federation, 298 p. (in Russian). 
20. Torrisi, G., Mariethoz, S., Smith, R. & Morari, M. (2015). “Comparison of the Efficiency of Different Magnetization Strategies for a Variable Speed Induction Machine Drive”, 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe), Geneva, Switzerland, 10 p. DOI: 10.1109/EPE.2015.7309387. 

Received 26.04.2020 
Received after revision 07.06.2020 
Accepted 12.06. 2020
Published:
Last download:
13 Oct 2021

Contents


[ © KarelWintersky ] [ All articles ] [ All authors ]
[ © Odessa National Polytechnic University, 2018.]