DOI: https://doi.org/10.15407/techned2019.05.054

METHOD FOR CALCULATION OF NO-LOAD BACK EMF OF HIGH VOLTAGE LINE-START PERMANENT MAGNET SYNCHRONOUS MOTOR

Authors
Hongbo Qiu, Yong Zhang, Cunxiang Yang, Ran Yi
School of Electrical and Information Engineering, Zhengzhou University of Light Industry,
Dongfeng Road No. 5, 450002, Zhengzhou, China,
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Abstract

When the finite element method is used to calculate the no-load back EMF of the high voltage line-start permanent magnet synchronous motor (HV-LS-PMSM), choosing the actual length and effective length of the stator core will cause different calculation results. In order to accurately calculate the no-load back EMF of HV-LS-PMSM with ventilation ducts, the 1000 kW, 10 kV HV-LS-PMSM is taken as an example to establish the finite element model of the prototype, and the correctness of the model is verified by analytical calculation. Firstly, based on the actual length of the stator core, the finite element models of 2D and 3D without ventilation ducts are established. The difference between the two models is compared in calculation of no-load back-EMF, and the difference between them is obtained. Secondly, based on the effective length of the stator core, a 2D finite element model is developed to compare the difference between the actual length of the stator core and its effective length in calculation of the no-load back EMF. Finally, the 3D finite element model with ventilation ducts is proposed, and the influence of ventilation ducts on the no-load back-EMF is analyzed. In this paper, the method for calculation of the no-load back-EMF is presented by 2D finite element model, which simplifies the calculation process and improves the efficiency of motor design. References 14, figures 6. tables 2.

Key words: line start; permanent magnet; synchronous motor; finite element method; no-load back EMF; actual length and effective length of the stator core; marginal effect.

Received: 04.03.2019
Accepted: 24.05.2019
Published: 01.08.2019

References
1. Aliabad A.D., Ghoroghchian F. Design and Analysis of a two-speed line start synchronous motor: scheme one. IEEE Transactions on Energy Conversion. 2016. No 1. Pp. 366-372. DOI: https://doi.org/10.1109/TEC.2015.2481929
2. Ding T., Takorabet N., Sargos F., Wang X. Design and analysis of different line-start PM synchronous motors for oil-pump applications. IEEE Transactions on Magnetics. 2009. No 3. Pp. 1816-1819. DOI: https://doi.org/10.1109/TMAG.2009.2012772
3. Grebenikov V.V., Priymak M.V. Design of the electric motor with permanent magnets for electric vehicle according the driving cycle. Technical Electrodynamics. 2018. No 5. Pp. 65-68. DOI: https://doi.org/10.15407/techned2018.05.065
4. Huang W., Bettayeb A., Kaczmarek R., Vannier J. Optimization of magnet segmentation for reduction of eddy-current losses in permanent magnet synchronous machine. IEEE Transactions on Energy Conversion. 2010. No 2. Pp. 381-387. DOI:https://doi.org/10.1109/TEC.2009.2036250
5. Isfahani A.H., Vaez-Zadeh S. Line start permanent magnet synchronous motors: Challenges and opportunities. Energy. 2009. No 11. Pp.1755-1763. DOI: https://doi.org/10.1016/j.energy.2009.04.022
6. Jedryczka C., Wojciechowski R. M., Demenko A. Influence of squirrel cage geometry on the synchronisation of the line start permanent magnet synchronous motor. IET Science Measurement & Technology. 2015. No 2. Pp. 197–203. DOI: https://doi.org/10.1049/iet-smt.2014.0198
7. Lafari-Shiadeh S.M., Ardebili M. Analysis and comparison of axial-flux permanent-magnet brushless-dc machines with fractional-slot concentrated-windings. 4th Annual International Power Electronics, Drive Systems and Technologies Conference. Tehran, Iran, February 13-14, 2013. Pp. 72-77. DOI: https://doi.org/10.1109/PEDSTC.2013.6506676
8. Melfi M.J., Umans S.D., Atem J.E. Viability of highly efficient multi-horsepower line-start permanent-magnet motors. IEEE Transactions on Industry Applications. 2015. No 1. Pp. 120-128. DOI: https://doi.org/10.1109/TIA.2014.2347239
9. Nam K., Hwang S., Shin P.S. An end-effect equivalent factor for back-EMF analysis of PMSM. 20th International Conference on Electrical Machines and Systems. Sydney, NSW, Australia, August 11-14, 2017. Pp. 1-4. DOI: https://doi.org/10.1109/ICEMS.2017.8056299
10. Vaskovskyi J.M., Haydenko J.A. Research of electromagnetic processes in permanent magnet synchronous motors based on a "electric circuit - magnetic field" mathematical model. Technical Electrodynamics. 2018. No 2. Pp. 47-54. DOI: https://doi.org/10.15404/techned2018.02.047
11. Vansompel H., Sergeant P., Dupre L. A multilayer 2-D-2-D coupled model for eddy current calculation in the rotor of an axial-flux PM machine. IEEE Transactions on Energy Conversion. 2012. No 3. Pp. 784-791. DOI: https://doi.org/10.1109/TEC.2012.2192737
12. Yamazaki K., Fukushima Y., Sato M. Loss analysis of permanent-magnet motors with concentrated windings-variation of magnet eddy-current loss due to stator and rotor shapes. IEEE Transactions on Industry Applications. 2009. No. 4. Pp. 1334-1342. DOI: https://doi.org/10.1109/TIA.2009.2023393
13. Zhu J., Li S., Song D., Han Q., Li, G. Magnetic field calculation and multi-objective optimization of axial flux permanent magnet generator with coreless stator windings. Journal of Electrical Engineering & Technology. 2018. No 4. Pp. 1585-1594.
14. Zhang Z., Xie Z., Ma H., Zhong Q. Analysis of demagnetization fault back-emf of permanent magnet synchronous motor using mathematical model based on magnetic field superposition principle. Technical Electrodynamics. 2016. No. 2. Pp. 42-48. DOI: https://doi.org/10.15407/techned2016.02.042

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