Bhalala, Jaydeep (2020) Prototyping a Novel Core Loss Tester for Assembled Stator Lamination Stacks. Masters thesis, Concordia University.
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Abstract
In the modern industrial world, electrical machines have become the backbone of the industry. Electrical machines account for nearly 60% of the total electricity consumption in the industrialized countries, hence a huge energy saving can be achieved even by a small increment in electrical machine efficiency. This improvement starts right at the machine design stage. Improving the machine design requires accurate quantification of the machine losses. A significant portion of the losses in the electrical machines is due to the core loss in the magnetic material. The core loss measurement in the stators and rotors is still an open problem. Most of the available techniques and testers for core loss estimation do not take into account the effect of the various mechanical processes and shape of the magnetic material under test. In addition, most of the current standardized core loss estimation techniques and testers are based on pulsating magnetic field only, whereas all the rotating electrical machines have a rotational magnetic field.
In this research work, a new core loss tester to measure core loss in assembled stator lamination stacks is analysed, simulated and prototyped with successful result validation between simulation and experimental tests. The new tester is suitable for the measurement of rotational core loss, and is capable of measuring loss with different number of pole combinations and excitation frequencies. Measurements were carried out using an induction machine stator.
This work describes the influence of different flux patterns generated based on the number of poles in the excitation winding. Experimental tests were carried out and the core loss data were recorded for various test cases. The developed tester accounts for the effect of mechanical processes like punching, laser cutting, stack pressing, etc. Experimental results are obtained from the tester are compared with the simulated results and the percentage difference in the core loss is presented. The core losses measured by the standardized pulsating core loss testers like Epstein frame are compared with that measured from the new tester to study the effect of rotational excitation on the core loss measurement. This work also presents the shortcomings of using commercially available pulsating loss data for core loss simulation by comparing the simulated results with the experimentally measured core loss.
| Divisions: | Concordia University > Gina Cody School of Engineering and Computer Science > Electrical and Computer Engineering |
|---|---|
| Item Type: | Thesis (Masters) |
| Authors: | Bhalala, Jaydeep |
| Institution: | Concordia University |
| Degree Name: | M.A. Sc. |
| Program: | Electrical and Computer Engineering |
| Date: | April 2020 |
| Thesis Supervisor(s): | Pillay, Pragasen |
| Keywords: | Core Loss, Rotational Core Loss, Stator Core Loss Measurement |
| ID Code: | 986725 |
| Deposited By: | Jaydeep Bhalala |
| Deposited On: | 23 Jun 2021 15:49 |
| Last Modified: | 24 Jun 2021 01:02 |
References:
[1] "Electric Machines," [Online]. Available: https://www.energy.gov/eere/amo/electric-machines.[2] G. A. Mckoy, T. Litman and J. G. Douglass, Energy-Efficient Electric Motor Selection Handbook Review 3, Washington State Energy Office, January 1993.
[3] G. Seggewiss, J. Dai and M. Fanslow, "Synchronous Motors on Grinding Mills: The Different Excitation Types and Resulting Performance Characteristics with VFD Control for New or Retrofit Installations," IEEE Industry Applications Magazine, vol. 21, no. 6, pp. 60-67, Nov.-Dec. 2015.
[4] A. Boglietti, A. Cavagnino, D. M. Ionel, M. Popescu, D. A. Staton and S. Vaschetto, "A General Model to Predict the Iron Losses in PWM Inverter-Fed Induction Motors," IEEE Transactions on Industry Applications, vol. 46, no. 5, pp. 1882-1890, Sept.-Oct. 2010.
[5] J. Gieras, "New applications of synchronous generators," Przeglad Elektrotechniczny (Electrotechnical Review), vol. 88, no. 9a, pp. 150-157, 2012.
[6] ASTM A343 / A343M-14, Standard Test Method for Alternating-Current Magnetic Properties of Materials at Power Frequencies Using Wattmeter-Ammeter-Voltmeter Method and 25-cm Epstein Test Frame, West Conshohocken, PA: ASTM International, 2019.
[7] ASTM A348 / A348M-05, Standard Test Method for Alternating Current Magnetic Properties of Materials Using the Wattmeter-Ammeter-Voltmeter Method, 100 to 10 000 Hz and 25-cm Epstein Frame, West Conshohocken, PA: ASTM International, 2015.
[8] ASTM A927 / A927M-18, Standard Test Method for Alternating-Current Magnetic Properties of Toroidal Core Specimens Using the Voltmeter-Ammeter-Wattmeter Method, West Conshohocken, PA: ASTM International, 2018.
[9] ASTM A804 / A804M-04, Standard Test Methods for Alternating-Current Magnetic Properties of Materials at Power Frequencies Using Sheet-Type Test Specimens, West Conshohocken, PA: ASTM International, 2015.
[10] L. T. Mthombeni and P. Pillay, "Core losses in motor laminations exposed to high-frequency or nonsinusoidal excitation," IEEE Transactions on Industry Applications, vol. 40, no. 5, pp. 1325-1332, Sept.-Oct. 2004.
[11] J. Sievert, H. Ahlers, M. Birkfeld, B. Cornut, F. Fiorillo, K. A. Hempel, T. Kochmann, A. Kedous-Lebouc, T. Meydan, A. Moses and A. M. Rietto, "European intercomparison of measurements of rotational power loss in electrical sheet steel," Journal of Magnetism and Magnetic Materials, vol. 160, pp. 115-118, 1996.
[12] H. Pfutzner, E. Mulasalihovic, H. Yamaguchi, D. Sabic, G. Shilyashki and F. Hofbauer, "Rotational Magnetization in Transformer Cores—A Review," IEEE Transactions on Magnetics, vol. 47, no. 11, pp. 4523-4533, Nov. 2011.
[13] C. Ragusa, S. Zurek, C. Appino and A. J. Moses, "An intercomparison of rotational loss measurements in non-oriented Fe–Si alloys," Journal of Magnetism and Magnetic Materials, vol. 320, no. 20, pp. e623-e626, 2008.
[14] S. Zurek and T. Meydan, "Errors in the power loss measured in clockwise and anticlockwise rotational magnetisation. Part 1: Mathematical study," IEE Proceedings - Science, Measurement and Technology, vol. 153, no. 4, pp. 147-151, 7 July 2006.
[15] M. Jesenik, V. Goričan, M. Trlep, A. Hamler and B. Štumberger, "Eddy Current Effects in the Sample of 2D R.R.S.S.T. and in the Sample of 2D S.R.S.S.T.," in Computer Engineering in Applied Electromagnetism, Dordrecht, Springer, 2005, pp. 297-300.
[16] J. Wanjiku and P. Pillay, "Design Considerations of 2-D Magnetizers for High Flux Density Measurements," IEEE Transactions on Industry Applications, vol. 51, no. 5, pp. 3629-3638, Sept.-Oct. 2015.
[17] N. Alatawneh and P. Pillay, "Design of a Novel Test Fixture to Measure Rotational Core Losses in Machine Laminations," IEEE Transactions on Industry Applications, vol. 48, no. 5, pp. 1467-1477, Sept.-Oct. 2012.
[18] A. M. El-Refaie, "Motors/generators for traction/propulsion applications: A review," IEEE Vehicular Technology Magazine, vol. 8, no. 1, pp. 90-99, March 2013..
[19] A. Krings, M. Cossale, J. Soulard, A. Boglietti and A. Cavagnino, "Manufacturing influence on the magnetic properties and iron losses in cobalt-iron stator cores for electrical machines," in IEEE Energy Conversion Congress and Exposition (ECCE), Pittsburgh, PA, 2014.
[20] A. Boglietti, A. Cavagnino, M. Lazzari and M. Pastorelli, "Effects of punch process on the magnetic and energetic properties of soft magnetic material," in IEEE International Electric Machines and Drives Conference, Cambridge, MA, USA, 2001.
[21] S. Elfgen, S. Steentjes, S. Böhmer, D. Franck and K. Hameyer, "Influences of Material Degradation Due to Laser Cutting on the Operating Behavior of PMSM Using a Continuous Local Material Model," IEEE Transactions on Industry Applications, vol. vol. 53, no. no. 3, pp. pp. 1978-1984, May-June 2017.
[22] H. A. Weiss, P. Tröber, R. Golle, W. Volk, S. Steentjes, N. Leuning, S. Elfgen and K. Hameyer, "Impact of Punching Parameter Variations on Magnetic Properties of Nongrain-Oriented Electrical Steel," IEEE Transactions on Industry Applications, vol. 54, no. 6, pp. 5869-5878, Nov.-Dec. 2018.
[23] L. Masisi, M. Ibrahim, J. Wanjiku, A. M. Aljehaimi and P. Pillay, "The Effect of Two- and Three-Level Inverters on the Core Loss of a Synchronous Reluctance Machine (SynRM)," IEEE Transactions on Industry Applications, vol. 52, no. 5, pp. 3805-3813, Sept.-Oct. 2016.
[24] M. Oka, T. Ogasawara, N. Kawano and M. Enokizono, "Estimation of Suppressed Iron Loss by Stress-Relief Annealing in an Actual Induction Motor Stator Core by Using the Excitation Inner Core Method," IEEE Transactions on Magnetics, vol. 50, no. 11, pp. 1-4, Nov. 2014.
[25] T. Okubo, G. Shilyashki, H. Pfützner, A. Kenov and Y. Oda, "Can Circular Rotational Losses of Non-Oriented Soft Magnetic Materials Be Estimated From Alternating Losses," IEEE Transactions on Magnetics, vol. 54, no. 12, pp. 1-6, Dec. 2018.
[26] N. Stranges and R. D. Findlay, "Methods for predicting rotational iron losses in three phase induction motor stators," IEEE Transactions on Magnetics, vol. 36, no. 5, pp. 3112-3114, Sept 2000.
[27] S. Nazrulla, E. G. Strangas, J. S. Agapiou and T. A. Perry, "A Device for the Study of Electrical Steel Losses in Stator Lamination Stacks," IEEE Transactions on Industrial Electronics, vol. 61, no. 5, pp. 2217-2224, May 2014.
[28] D. Schmitz, N. Sadowski, S. L. Nau, N. J. Batistela and J. P. A. Bastos, "Three-Phase Electromagnetic Device for the Evaluation of the Magnetic Losses in Electric Motors," IEEE Transactions on Energy Conversion, vol. 30, no. 2, pp. 515-521, June 2015.
[29] A. Takbash, M. Ibrahim, L. Masisi and P. Pillay, "Core Loss Calculation in a Variable Flux Permanent Magnet Machine for Electrified Transportation," IEEE Transactions on Transportation Electrification, vol. 4, no. 4, pp. 857-866, Dec. 2018.
[30] N. Stranges, An Investigation of Iron Losses Due to Rotating Flux in Three Phase Induction Motor Cores, Hamilton: PhD, McMaster University, 2000.
[31] J. C. Akiror, A. Merkhouf, C. Hudon and P. Pillay, "Consideration of Design and Operation on Rotational Flux Density Distributions in Hydrogenerator Stators," IEEE Transactions on Energy Conversion, vol. 30, no. 4, pp. 1585-1594, Dec. 2015.
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