21 7 2017 7 Electri c Machines and Control Vol. 21 No. 7 Jul. 2017 1 2 1 3 1. 200031 2. 210000 3. 150080 totally enclosed fan-cool TEFC 55 kw DOI 10. 15938 /j. emc. 2017. 07. 012 TM 15 A 1007-449X 2017 07-0087- 07 Calculation of 3D whole domain steady temperature fields for TEFC motor FENG Hai-jun 1 DING Shu-ye 2 ZHOU Pu 1 LI Guan-nan 3 1. No. 704 Research Institute of CSIC Shanghai 200031 China 2. Nari School of Electrical and Automation Nanjing Normal Univerisity Nanjing 210000 China 3. College of Electrical and Electronic Engineering Harbin University of Science and Technology Harbin 150080 China Abstract In order to research the temperature field of the TEFC induction motor under rated load conditions a 55 kw asynchronous motor was taken as an example. The motor real structure was simplified using equivalent method and the equivalent model of the actual windings was established by the method of insulation equivalent. Based on the basic law of heat conduction and steady-state heat conduction equation the simulation model of the temperature field was established and the steady temperature field was calculated with finite-element method. The problem of rotor rotation and air flow in motor was solved by using the concept of equivalent coefficient of heat conductivity. Temperature distribution characteristics of the motor was obtained. Temperature field of different positions of the stator core was studied in detail. The temperature distribution inside the rotor was analyzed and temperature rise of single winding and the windings a- long the circumferential direction was also numerically analyzed. At last the experimental test was carried out on the prototype comparing the calculated results with the experimental value and accuracy of the calculation method was verified. 2017-03 - 02 2016RAXXJ026 1254 - NCET006 1982 1978 1982 1988
88 21 Keywords totally enclosed fan-cool induction motor 3D temperature field finite elements method numerical analysis loss characteristic 0 1. 2 TEFC 1 14 TEFC 1-11 1 Fig. 1 Structural schematic of electrical machine 2 2 a 2 b 856. 4 Y2-250M - 4 55 kw 1 1. 1 2 Fig. 2 Physical model and interior 12-13 1. 3 x λ T x x + y λ T y y + z λ T z = - q } z - λ T n = α T - T f T λ x λ y λ z q 1 α T f x y z 3 n 15 λ eff λ eff
7 89 1 Table 1 Heat flux density of each part Re = uδ γ 2 u δ γ R i Re er = 41. 2 槡 δ 3 506 182. 5 Re > Re er 2. 1 λ eff = 0. 001 9 η -2. 908 4 Re 0. 4614ln 3. 333 61η 3 4 η = r 0 /R i R i r 0 λ eq = n δ i / n δ i /λ i 5 i = 1 i = 1 λ eq δ i i = 1 2 3 n λ i 1. 4 α 16 α = 9. 37 + 14v 0. 62 v 6 17 / W /m 3 39 582. 853 218 884. 526 452 272. 375 236. 918 80 998. 64 α 1 = 20 + 14. 3u 0. 6 0 7 3 α 2 = 20 + 2. 6u 0. 6 Fig. 3 Temperature rise of motor casing 0 8 u 0 4 2 1
90 21 2. 2 5 62 K 58 K a b c AB 66 K BC CD 62 K DE 61 K 57 K 5 0. 9 mm 86 K 1 /4 76 K 63 K 3 Fig. 6 6 Temperature change of tooth top in axial length Fig. 4 4 Temperature rise inside of the motor 7 Fig. 5 5 Temperature change in the middle of the axial along radial direction 6 a b c 7 Fig. 7 7 Temperature change of windings along the circumferential direction
7 91 5 K 18 K 85 K 4 K π /2 3π /4 1 /2 8 8 9 9 Fig. 9 Temperature rise distribution of the single winding 10 104 K 120. 9 K 8 Fig. 8 Schematic diagram of temperature rise distribution and extraction path 9 11 K 2 K 8 K 4 K 3 8. 5 11
92 21-0. 5 K - 0. 6% PT100 Fig. 12 12 Embedding location of the sensor Fig. 10 10 Temperature rise distribution of rotor section 11 Fig. 11 Experimental test platform 13 Fig. 13 Contrast of measured temperature and calculated temperature 12 15 15 4 U D G 1 20 K 13 2 17 K 15 10 5 K 1 5. 8 K 3 6. 5% 9 3. 6 K 7 0. 3 5 4-2. 8 K - 3%
7 93 2 K 1 GNACINSKI P PEPLINSKI M SZWEDA M. The effect of subharmonics on induction machine heating C / /13th International Power Electronics and Motion Control Conference September 1-3 2008 Poznań Poland. 2008 826-829. 2 VONG P K RODGER D. Coupled electromagnetic thermal modeling of electrical machines J. IEEE Transactions on Magnetics 2003 39 3 1614. 3 XYPTERAS J HATZIATHANASSIOU V. Thermal analysis of an electrical machine taking into account the iron losses and the deepbar effect J. IEEE Transactions on Energy Conversion 1999 14 4 996. J. Proceedings of the CSEE 2012 32 3 137. 4. 12 BOGLIETTI A CAVAGNINO A LAZARRI M et al. A simplified J. 2015 20 5 1. DING Shuye GUAN Tianyu CUI Guanghui. The research on temperature field of asynchronous motor for ship drive J. Journal of Harbin University of Science and Technology 2015 20 5 1. 5 BASTOS J P CABREIRA M F R R. A thermal analysis of induction motors using a weak coupled modeling J. IEEE Transactions on Magnetics 1997 3 2 1714. 6 STATON D BOGLIETTI A CAVAGNINO A. Solving the more difficult aspects of electric motor thermal analysis in small and medium size industrial induction motors J. IEEE Transactions on Energy Conversion 2005 20 3 620. 7. J. 2016 20 1 52. KONG Han LIU Jinglin. Study of rotor eccentricity effect on permanent magnet servo motor performance J. Electric Machines and Control 2016 20 1 52-59. 8. 16. M. J. 2012 32 24 74. DING Shuye GE Yunzhong SUN Zhaoqiong et al. Numerical research on temperature and fluid field for high-altitude wind power generator J. Proceedings of the CSEE 2012 32 24 74. 9. J. 2016 21 4 59. LU Yiping LI Huilan HAN Jiade et al. Three dimensional flow field numerical simulation for some axial ventilation brushless exciter J. Journal of Harbin University of Science and Technology 2016 21 4 59. 10. J. 2012 16 3 83. DING Shuye GE Yunzhong CHEN Weijie et al. Coupling calculation and analysis of three-dimensional temperature field for doubly-fed wind generator J. Electric Machines and Control 2012 16 3 83. 11. 3 MW J. 2012 32 3 137. DING Shuye SUN Zhaoqiong XU Dianguo et al. Numerical investigation of heat transfer for 3MW doubly-fed wind generator thermal model for variable-speed self-cooled induction motor J. IEEE Transactions on Industry Applications 2003 39 4 945. 13 BOGLIETTI A CAVAGNINO A STATON D. TEFC induction motors thermal models a parameter sensitivity analysis J. IEEE Transactions on Industry Applications 2005 41 3 756. 14. J. 2015 51 14 152. CHEN Weijie DING Shuye MIAO Lijie. Research on temperature field non-uniformly distributive heat source coupled investigation of ventilator-driving motor J. Journal of Mechanical Engineering 2015 51 14 152. 15 YABIKU R FIALHO R TERAN L et al. Use of thermal network on determining the temperature distribution inside electric motors in steady-state and dynamic conditions J. IEEE Transactions on Industry Applications 2010 46 5 1787. 2007 377-389. 17. M. 1998 1-12.