CLC number:
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2023-03-17
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Yao LI, Lin QIU, Yongjian ZHI, Zifan GAO, Jien MA, Jian ZHANG, Youtong FANG. An overview of bearing voltages and currents in rail transportation traction motors[J]. Journal of Zhejiang University Science A, 2023, 24(3): 226-242.
@article{title="An overview of bearing voltages and currents in rail transportation traction motors",
author="Yao LI, Lin QIU, Yongjian ZHI, Zifan GAO, Jien MA, Jian ZHANG, Youtong FANG",
journal="Journal of Zhejiang University Science A",
volume="24",
number="3",
pages="226-242",
year="2023",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2200180"
}
%0 Journal Article
%T An overview of bearing voltages and currents in rail transportation traction motors
%A Yao LI
%A Lin QIU
%A Yongjian ZHI
%A Zifan GAO
%A Jien MA
%A Jian ZHANG
%A Youtong FANG
%J Journal of Zhejiang University SCIENCE A
%V 24
%N 3
%P 226-242
%@ 1673-565X
%D 2023
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2200180
TY - JOUR
T1 - An overview of bearing voltages and currents in rail transportation traction motors
A1 - Yao LI
A1 - Lin QIU
A1 - Yongjian ZHI
A1 - Zifan GAO
A1 - Jien MA
A1 - Jian ZHANG
A1 - Youtong FANG
J0 - Journal of Zhejiang University Science A
VL - 24
IS - 3
SP - 226
EP - 242
%@ 1673-565X
Y1 - 2023
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2200180
Abstract: In modern rail transportation, inverter drive systems have been extensively used due to their excellent speed control capabilities. However, in recent years, premature failure problems caused by bearing voltage and current phenomena have been frequently reported in electric motors, with electrical bearing failures making up a considerable percentage. The purpose of this review is to provide a comprehensive overview of facets relating to the electrical erosion of bearings in an electrical environment represented by railway vehicles. First, the origins of the phenomenon as well as typical bearing electrical failure modes are discussed. Next, we introduce the distinctive features of the electrical environment of railway traction motor bearings, including output voltages with high common-mode components and systems with complex grounding configurations. Then, we classify the fundamental mechanisms for generating bearing voltages/currents into four groups, and present their modeling processes, including equivalent circuit establishment and parameter determination methods. Furthermore, we summarize the strategies frequently used to protect bearings, and describe a typical solution to suppress electrical bearing failures in railway vehicles. Finally, we present a case example to illustrate a research procedure for systematic investigation of inverter-induced bearing currents in rail transportation.
[1]ABB, 2021. Rogowski Coil Current Sensors for Arc Flash Detection. ABB Review. https://new.abb.com/news/detail/78554/rogo-wski-coil-current-sensors-for-arc-flash-detection
[2]AdabiJ, ZareF, GhoshA, et al., 2010. Calculations of capacitive couplings in induction generators to analyse shaft voltage. IET Power Electronics, 3(3):379-390.
[3]AEGIS, 2007. Shaft Grounding Rings for Low Voltage Motors. https://www.est-aegis.com/product/sgr/
[4]AEGIS, 2018. Bearing Protection Handbook: Best Practices for Bearing Protection in New and Repaired Motors, Testing In-Service Motors, and Inspecting Damaged Motor Bearings. https://www.morganadvancedmaterials.com/media/7645/aegis-bearing-protection.pdf
[5]AkagiH, TamuraS, 2006. A passive EMI filter for eliminating both bearing current and ground leakage current from an inverter-driven motor. IEEE Transactions on Power Electronics, 21(5):1459-1469.
[6]AlgerPL, SamsonHW, 1924. Shaft currents in electric machines. Transactions of the American Institute of Electrical Engineers, XLIII:235-245.
[7]AmmannC, ReichertK, JohoR, et al., 1988. Shaft voltages in generators with static excitation systems-problems and solution. IEEE Transactions on Energy Conversion, 3(2):409-419.
[8]BaiBD, WangY, WangXC, 2015. Suppression for discharging bearing current in variable-frequency motors based on electromagnetic shielding slot wedge. IEEE Transactions on Magnetics, 51(11):8109404.
[9]BerhausenS, JarekT, 2022. Analysis of impact of design solutions of an electric machine with permanent magnets for bearing voltages with inverter power supply. Energies, 15(12):4475.
[10]BhattacharyaS, RestaL, DivanDM, et al., 1999. Experimental comparison of motor bearing currents with PWM hard- and soft-switched voltage-source inverters. IEEE Transactions on Power Electronics, 14(3):552-562.
[11]BonnettAH, YungC, 2006. A construction, performance and reliability comparison for pre-EPAct, EPAct and premium-efficient motors. Record of Conference Papers–IEEE Industry Applications Society 53rd Annual Petroleum and Chemical Industry Conference.
[12]BoyantonHE, HodgesG, 2002. Bearing fluting [motors]. IEEE Industry Applications Magazine, 8(5):53-57.
[13]BoydJ, KaufmanHN, 1958. The causes and control of electrical currents in bearings. Lubrication Engineering, 2(6):28-35.
[14]BuckleyGW, CorkinsRJ, StephensRN, 1988. The importance of grounding brushes to the safe operation of large turbine generators. IEEE Transactions on Energy Conversion, 3(3):607-612.
[15]BusseDF, ErdmanJM, KerkmanRJ, et al., 1997a. Bearing currents and their relationship to PWM drives. IEEE Transactions on Power Electronics, 12(2):243-252.
[16]BusseDF, ErdmanJM, KerkmanRJ, et al., 1997b. Characteristics of shaft voltage and bearing currents. IEEE Industry Applications Magazine, 3(6):21-32.
[17]BusseDF, ErdmanJM, KerkmanRJ, et al., 1997c. The effects of PWM voltage source inverters on the mechanical performance of rolling bearings. IEEE Transactions on Industry Applications, 33(2):567-576.
[18]BusseDF, ErdmanJM, KerkmanRJ, et al., 1997d. System electrical parameters and their effects on bearing currents. IEEE Transactions on Industry Applications, 33(2):577-584.
[19]BusseDF, ErdmanJM, KerkmanRJ, et al., 1997e. An evaluation of the electrostatic shielded induction motor: a solution for rotor shaft voltage buildup and bearing current. IEEE Transactions on Industry Applications, 33(6):1563-1570.
[20]ChenSM, LipoTA, FitzgeraldD, 1996. Source of induction motor bearing currents caused by PWM inverters. IEEE Transactions on Energy Conversion, 11(1):25-32.
[21]ChenST, LipoTA, 1998. Circulating type motor bearing current in inverter drives. IEEE Industry Applications Magazine, 4(1):32-38.
[22]ChenST, LipoTA, FitzgeraldD, 1996. Modeling of motor bearing currents in PWM inverter drives. IEEE Transactions on Industry Applications, 32(6):1365-1370.
[23]ChenZW, 2021. Comparative Study of Grounding Reflux Schemes for Metro Vehicles. MS Thesis, Beijing Jiaotong University, Beijing, China(in Chinese).
[24]ChengZL, ZhouWH, DingZ, et al., 2020. Estimation of spatiotemporal response of rooted soil using a machine learning approach. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 21(6):462-477.
[25]CostelloMJ, 1993. Shaft voltages and rotating machinery. IEEE Transactions on Industry Applications, 29(2):419-426.
[26]FerreiraFJTE, CistelecanMV, De AlmeidaAT, 2012. Evaluation of slot-embedded partial electrostatic shield for high-frequency bearing current mitigation in inverter-fed induction motors. IEEE Transactions on Energy Conversion, 27(2):382-390.
[27]FleishmannL, 1910. Currents in bearings and shafts. Elecktrische Kraftbetriebe and Bahnen, 11(8):11-17 (in German).
[28]FurtmannA, TischmacherH, PollG, 2016. Extended HF equivalent model of a drive train. XXII International Conference on Electrical Machines, p.2244-2250.
[29]GuttowskiS, WeberS, SchinkelM, et al., 2006. Troubleshooting and fixing of inverter driven induction motor bearing currents in existing plants of large size–an evaluation of possible mitigation techniques in practical applications. Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, p.6.
[30]HanY, LuHF, LiYD, et al., 2019. Analysis and suppression of shaft voltage in SiC-based inverter for electric vehicle applications. IEEE Transactions on Power Electronics, 34(7):6276-6285.
[31]HedayatiMH, AcharyaAB, JohnV, 2013. Common-mode filter design for PWM rectifier-based motor drives. IEEE Transactions on Power Electronics, 28(11):5364-5371.
[32]HolmesDG, LipoTA, 2003. Pulse Width Modulation for Power Converters: Principles and Practice. John Wiley & Sons, Inc., Hoboken, USA.
[33]HyypioD, 2005. Mitigation of bearing electro-erosion of inverter-fed motors through passive common-mode voltage suppression. IEEE Transactions on Industry Applications, 41(2):576-583.
[34](International Electrotechnical Commission)IEC, 2014. Rotating Electrical Machines—Part 25: AC Electrical Machines Used in Power Drive Systems—Application Guide, IEC TS 60034-25. IEC.
[35]IEEE (Institute of Electrical and Electronics Engineers), 1997. IEEE Standard Test Procedure for Polyphase Induction Motors and Generators, IEEE Standard 112-1996. IEEE.
[36]LiuRF, ChenJY, MaXP, et al., 2014a. Calculation and measurement of coupling capacitances in AC motors based on bearing currents problem induced by PWM inverters. Transactions of China Electrotechnical Society, 29(1):60-67 (in Chinese). https://doi.org/10.19595/j.cnki.1000-6753.tces.2014.01.009
[37]LiuRF, LouZF, MaXP, et al., 2014b. Modeling of bearing capacitance and resistance in motor bearing current problem. Proceedings of the CSEE, 34(15):2430-2437 (in Chinese).
[38]LiuRF, SangBQ, CaoJC, 2015a. Investigation on the influence of motors grounding states on bearing voltage in inverter drive system. Proceedings of the CSEE, 35(S1):177-183 (in Chinese).
[39]LiuRF, LiJF, SangBQ, et al., 2015b. Modeling of coupled capacitances and bearing voltage in induction motors fed by inverters based on numerical calculation of electromagnetic field. Transactions of China Electrotechnical Society, 30(14):161-169 (in Chinese).
[40]LiuRF, SangBQ, LiWL, 2017. Calculations and measurements of bearing capacitance in AC motor bearings. Proceedings of the CSEE, 37(10):2986-2993 (in Chinese).
[41]LuoZX, 2021. Research on traction motor bearing electric erosion of metro vehicle and its improvement measures. Electric Drive for Locomotives, (2):37-41 (in Chinese).
[42]MagdunO, BinderA, 2009. Calculation of roller and ball bearing capacitances and prediction of EDM currents. The 35th Annual Conference of IEEE Industrial Electronics, p.1051-1056.
[43]MagdunO, BinderA, 2014. High-frequency induction machine modeling for common mode current and bearing voltage calculation. IEEE Transactions on Industry Applications, 50(3):1780-1790.
[44]MagdunO, GemeinderY, BinderA, 2010a. Investigation of influence of bearing load and bearing temperature on EDM bearing currents. IEEE Energy Conversion Congress and Exposition, p.2733-2738.
[45]MagdunO, GemeinderY, BinderA, 2010b. Prevention of harmful EDM currents in inverter-fed AC machines by use of electrostatic shields in the stator winding overhang. The 36th Annual Conference on IEEE Industrial Electronics Society, p.962-967.
[46]MagdunO, GemeinderY, BinderA, et al., 2011. Calculation of bearing and common-mode voltages for the prediction of bearing failures caused by EDM currents. The 8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics & Drives, p.462-467.
[47]MuetzeA, 2004. Bearing Currents in Inverter-Fed AC-Motors. PhD Thesis, Technische Universität Darmstadt, Darmstadt, Germany.
[48]MuetzeA, BinderA, 2006. Don’t lose your bearings. IEEE Industry Applications Magazine, 12(4):22-31.
[49]MuetzeA, BinderA, 2007a. Calculation of circulating bearing currents in machines of inverter-based drive systems. IEEE Transactions on Industrial Electronics, 54(2):932-938.
[50]MuetzeA, BinderA, 2007b. Calculation of motor capacitances for prediction of the voltage across the bearings in machines of inverter-based drive systems. IEEE Transactions on Industry Applications, 43(3):665-672.
[51]MuetzeA, BinderA, 2007c. Practical rules for assessment of inverter-induced bearing currents in inverter-fed AC motors up to 500 kW. IEEE Transactions on Industrial Electronics, 54(3):1614-1622.
[52]MuetzeA, BinderA, 2007d. Techniques for measurement of parameters related to inverter-induced bearing currents. IEEE Transactions on Industry Applications, 43(5):1274-1283.
[53]MuetzeA, OhHW, 2008a. Application of static charge dissipation to mitigate electric discharge bearing currents. IEEE Transactions on Industry Applications, 44(1):135-143.
[54]MuetzeA, OhHW, 2008b. Design aspects of conductive microfiber rings for shaft-grounding purposes. IEEE Transactions on Industry Applications, 44(6):1749-1757.
[55]MuetzeA, OhHW, 2010. Current-carrying characteristics of conductive microfiber electrical contact for high frequencies and current amplitudes: theory and applications. IEEE Transactions on Power Electronics, 25(8):2082-2092.
[56]MuetzeA, SullivanCR, 2011. Simplified design of common-mode chokes for reduction of motor ground currents in inverter drives. IEEE Transactions on Industry Applications, 47(6):2570-2577.
[57]PlazenetT, BoileauT, 2021. Overview of bearing white etching cracks due to electrical currents. IEEE 13th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, p.440-446.
[58]PlazenetT, BoileauT, CaironiC, et al., 2018. A comprehensive study on shaft voltages and bearing currents in rotating machines. IEEE Transactions on Industry Applications, 54(4):3749-3759.
[59]PungaF, HessW, 1907. Bearing currents. Elektrotechnik und Maschinenbau, 25(8):615-618 (in German).
[60]RaymondOKJ, 1999. An Investigation of Shaft Current in a Large Sleeve Bearing Induction Machine. PhD Thesis, McMaster University, Ontario, Canada.
[61]ShamsirbandS, KhansariNM, 2021. Micro-mechanical damage diagnosis methodologies based on machine learning and deep learning models. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 22(8):585-608.
[62]SKF, 2014. Electrical Discharge Detector Pen. SKF. https://www.skf.com/group/products/condition-monitoring-systems/basic-condition-monitoring-products/electrical-discharge-current-measurement
[63]SKF, 2019. SKF @ptitude Analyst. https://www.skf.com/binaries/pub12/Images/0901d1968059796b-PUB-CM-P8-10299-12-EN-SKF-Aptitude-Analyst-brochure_tcm_12-582180.pdf
[64]SKF, 2022. The Future of Bearing Failure Analysis is Here. https://evolution.skf.com/en/the-future-of-bearing-failure-analysis-is-here/
[65]SunaharaK, IshidaY, YamashitaS, et al., 2011. Preliminary mea
[66]surements of electrical micropitting in grease-lubricated point contacts. Tribology Transactions, 54(5):730-735.
[67]SuzumuraJ, 2016. Prevention of electrical pitting on rolling bearings by electrically conductive grease. Quarterly Report of RTRI, 57(1):42-47.
[68]TischmacherH, GattermannS, 2010. Bearing currents in converter operation. The XIX International Conference on Electrical Machines, p.1-8.
[69]TischmacherH, GattermannS, 2012a. Investigations on bearing currents in converter-fed electrical motors. The XXth International Conference on Electrical Machines, p.1764-1770.
[70]TischmacherH, GattermannS, 2012b. Multiple signature analysis for the detection of bearing currents and the assessment of the resulting bearing wear. International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion, p.1354-1359.
[71]TischmacherH, TsoumasIP, FurtmannA, 2015. Extended probability model for discharge activities in the drive train of converter-fed electric motors. The 17th European Conference on Power Electronics and Applications, p.1-10.
[72]UnE, HavaAM, 2009. A near-state PWM method with reduced switching losses and reduced common-mode voltage for three-phase voltage source inverters. IEEE Transactions on Industry Applications, 45(2):782-793.
[73]VostrovK, PyrhönenJ, LindhP, et al., 2021. Mitigation of inverter-induced noncirculating bearing currents by introducing grounded electrodes into stator slot openings. IEEE Transactions on Industrial Electronics, 68(12):11752-11760.
[74]WangF, 2000. Motor shaft voltages and bearing currents and their reduction in multilevel medium-voltage PWM voltage-source-inverter drive applications. IEEE Transactions on Industry Applications, 36(5):1336-1341.
[75]WangY, BaiBD, LiuWF, et al., 2015. Hertz bearing current density calculation of variable frequency driven motors by frequency domain parasitic capacitance method. Transactions of China Electrotechnical Society, 30(2):189-195 (in Chinese).
[76]YanGL, ZhiYJ, ChenX, et al., 2019. Research on mechanism and suppression technique of metro vehicles traction motor bearing electrocorrosion. Electric Drive for Locomotives, (4):102-106 (in Chinese).
[77]YeaM, HanKJ, 2020. Modified slot opening for reducing shaft-to-frame voltage of AC motors. Energies, 13(3):760.
[78]ZhangDM, ZhangJZ, HuangHW, et al., 2020. Machine learning-based prediction of soil compression modulus with application of 1D settlement. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 21(6):430-444.
[79]ZhangHR, von JouanneA, DaiSA, et al., 2000. Multilevel inverter modulation schemes to eliminate common-mode voltages. IEEE Transactions on Industry Applications, 36(6):1645-1653.
[80]ZhangPJ, DuY, HabetlerTG, et al., 2011. A survey of condition monitoring and protection methods for medium-voltage induction motors. IEEE Transactions on Industry Applications, 47(1):34-46.
[81]ZhangSG, 2008. CRH1 EMU. China Railway Publishing House, Beijing, China, p.134-166 (in Chinese).
[82]ZhaoQC, YangEL, LiuRF, et al., 2021. Modeling of high frequency bearing currents of induction motors powered by frequency converters. Proceedings of the CSEE, 41(23):8139-8147 (in Chinese).
[83]ZhaoSF, HuangXY, FangYT, et al., 2020. DC-link-fluctuation-resistant predictive torque control for railway traction permanent magnet synchronous motor in the six-step operation. IEEE Transactions on Power Electronics, 35(10):10982-10993.
[84]ZhouLM, HuaiXJ, ShenZ, et al., 2022. Common mode equivalent circuit modeling and parameter testing of traction motor. Electric Locomotives & Mass Transit Vehicles, 45(1):30-34.
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