Use of 3–dimensional finite elements for computation of temperature distribution in the Stator of an Induction Motor during Direct-On-Line Starting

  • Nirmal Kr. Bhattacharya Dept. of Physics, Jadavpur University
  • Ashok Kr. Naskar Department of Electrical Engineering, Techno India-Batanagar
  • Debasis Sarkar EE Department, IIEST Shibpur

Abstract

Transient thermal analysis of induction machines is a subject of interest for machine designers in their effort to improvemachine reliability. Since the stator is static, it is prone to overheating. Therefore, the study of transient thermal behaviorin the stator is useful to identify causes of failure in induction machines. This paper presents a three-dimensional transientheat flow through the stator of an induction motor using arch shaped elements in the r--z plane of the cylindrical co-ordinatesystem. A temperature-time method is employed to evaluate the distribution of loss in various parts of the machine. Usingthese loss distributions as an input for finite-element analysis, more accurate temperature distributions can be obtained.The model is applied to one squirrel cage Totally Enclosed Fan Cooled (TEFC) machine of 7.5 kW. Finally, the temperaturesobtained by this three-dimensional approximation at different locations of the stator were compared for different stator currentsconsidering the time required for each stator current during the transient in Direct-On-Line starting.

References

[1] G. Rosenberry, The transient stalled temperature rise of castaluminum
squirrel-cage rotors for induction motors, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus
and Systems 74 (3) (1955) 819–824.
[2] S. K. Chowdhury, P. K. Baski, A simple lumped parameter thermal
model for electrical machine of tefc design, in: Power Electronics,
Drives and Energy Systems (PEDES) & 2010 Power India, 2010 Joint
International Conference on, IEEE, 2010, pp. 1–7.
[3] K. Reichert, The calculation of the temperature distribution in electrical
machines with the aid of the finite difference method, EGZ. A Bd 90
(1969) H6.
[4] C. Tindall, S. Brankin, Loss-at-source thermal modelling in salient
pole alternators using 3-dimensional finite difference techniques, IEEE
Transactions on Magnetics 24 (1) (1988) 278–281.
[5] A. Armor, M. Chari, Heat flow in the stator core of large turbinegenerators,
by the method of three-dimensional finite elements part
ii: Temperature distribution in the stator iron, IEEE Transactions on
Power Apparatus and Systems 95 (5) (1976) 1657–1668.
[6] C.-C. Hwang, S. Wu, Y. Jiang, Novel approach to the solution of temperature
distribution in the stator of an induction motor, IEEE transactions
on Energy Conversion 15 (4) (2000) 401–406.
[7] A. Armor, Transient, three-dimensional, finite-element analysis of heat
flow in turbine-generator rotors, IEEE Transactions on Power Apparatus
and Systems (3) (1980) 934–946.
[8] E. Dlala, Comparison of models for estimating magnetic core losses
in electrical machines using the finite-element method, IEEE Transactions
on Magnetics 45 (2) (2009) 716–725.
[9] S. Ruoho, T. Santa-Nokki, J. Kolehmainen, A. Arkkio, Modeling magnet
length in 2-d finite-element analysis of electric machines, IEEE Transactions
on Magnetics 45 (8) (2009) 3114–3120.
[10] S. Ruoho, E. Dlala, A. Arkkio, Comparison of demagnetization models
for finite-element analysis of permanent-magnet synchronous machines,
IEEE Transactions on Magnetics 43 (11) (2007) 3964–3968.
[11] H. X. Xia, L. Li, J. J. Du, L. Liu, Analysis and calculation of the 3d rotor
temperature field of a generator-motor, in: Electrical Machines and
Systems (ICEMS), 2011 International Conference on, IEEE, 2011, pp.
1–4.
[12] M. Islam, A. Arkkio, Time-stepping finite-element analysis of eddy currents
in the form-wound stator winding of a cage induction motor supplied
from a sinusoidal voltage source, IET Electric Power Applications
2 (4) (2008) 256–265.
[13] R. Lin, A. Arkkio, 3-d finite element analysis of magnetic forces on
stator end-windings of an induction machine, IEEE Transactions on
Magnetics 44 (11) (2008) 4045–4048.
[14] M. J. Islam, J. Pippuri, J. Perho, A. Arkkio, Time-harmonic finiteelement
analysis of eddy currents in the form-wound stator winding
of a cage induction motor, IET Electric Power Applications 1 (5) (2007)
839–846.
[15] D. AK Sarkar, Naskar, Approximate analysis of transient heat conduction
in an induction motor during reactor starting, in: Power Electronics
India International Conference, IEEE, 2010, pp. 1–8.
[16] D. Sarkar, N. Bhattacharya, Approximate analysis of transient heat
conduction in an induction motor during star-delta starting, in: Industrial
Technology, 2006. ICIT 2006. IEEE International Conference on,
IEEE, 2006, pp. 1601–1606.
[17] G. B. Kumbhar, S. M. Mahajan, Analysis of short circuit and inrush
transients in a current transformer using a field-circuit coupled fe formulation,
International Journal of Electrical Power & Energy Systems
33 (8) (2011) 1361–1367.
[18] C. Mejuto, M. Mueller, M. Shanel, A. Mebarki, D. Staton, Thermal modelling
investigation of heat paths due to iron losses in synchronous
machines, IEEE PEMD.
[19] B. R. Samaga, K. Vittal, Comprehensive study of mixed eccentricity
fault diagnosis in induction motors using signature analysis, International
Journal of Electrical Power & Energy Systems 35 (1) (2012)
180–185.
[20] R. Mujal-Rosas, Analysis of the three-phase induction motor with spiral
sheet rotor, International Journal of Electrical Power & Energy Systems
35 (1) (2012) 1–9.
[21] E. Dlala, Comparison of models for estimating magnetic core losses
in electrical machines using the finite-element method, IEEE Transactions
on Magnetics 45 (2) (2009) 716–725.
[22] M. Rajagopal, D. Kulkarni, K. Seetharamu, P. Ashwathnarayana, Axisymmetric
steady state thermal analysis of totally enclosed fan cooled
induction motors using fem, in: 2nd Nat. Conf. on CAD/CAM, 1994, pp.
19–20.
[23] M. Rajagopal, K. Seetharamu, P. Ashwathnarayana, Transient thermal analysis of induction motors, in: IEEE Trans on Energy conversion,
Vol. 13, IEEE, 1998, pp. 932–939.
[24] N. Zhao, Z. Zhu, W. Liu, Thermal analysis and comparison of permanent
magnet motor and generator, in: Electrical Machines and Systems
(ICEMS), 2011 International Conference on, IEEE, 2011, pp. 1–
5.
[25] J. Pippuri, A. Belahcen, E. Dlala, A. Arkkio, Inclusion of eddy currents
in laminations in two-dimensional finite element analysis, IEEE Transactions
on Magnetics 46 (8) (2010) 2915–2918.
Published
2016-09-17
How to Cite
BHATTACHARYA, Nirmal Kr.; NASKAR, Ashok Kr.; SARKAR, Debasis. Use of 3–dimensional finite elements for computation of temperature distribution in the Stator of an Induction Motor during Direct-On-Line Starting. Journal of Power Technologies, [S.l.], v. 97, n. 4, p. 347–353, sep. 2016. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/903>. Date accessed: 28 mar. 2024.
Section
Electrical Engineering

Keywords

FEM, Induction Motor, Thermal Analysis, Transients, Design Performance

Most read articles by the same author(s)

Obs.: This plugin requires at least one statistics/report plugin to be enabled. If your statistics plugins provide more than one metric then please also select a main metric on the admin's site settings page and/or on the journal manager's settings pages.