Study on voltage distribution in windings of an inverter-fed traction motor

Abstract

Voltage distribution in windings is important for inverter-fed traction motors. The analysis on voltage distribution characteristics is significant to the study of insulation failure mechanisms and structure design. First, a distribution parameter model has been developed according to the winding structure of an inverter-fed traction motor. Based on the model, finite element differential method was employed to determine voltage distribution characteristics. Simulation results were compared with actual voltage distribution. Moreover, the influence of pulse rise time and cable was discussed. The results show that the shorter the pulse rise time is, the more uneven the voltage distribution is. In addition, cable length has little influence on voltage distribution characteristics. However, the amplitude of voltage would also increase by 40% in coils and turns.

References

1. Tan X Y AdvancedSHEPWM technique for ac traction drivesProceedings of the CSEE21(9)4752 (in Chinese)
2. Zou Z B Cai L J Gan H X Nonlinear decoupling control of three phase voltage sourceSPWM inverterProceedings of the CSEE24(10)5760 (in Chinese)
3. Wheeler J C G Effects of converter pulses on the electrical insulation in low andmedium voltage motorsIEEE Electrical InsulationMagazine21(2)2229
4. Fabiani D Montanari G C Cavallini A et al.Relation between space charge accumulation and partialdischarge activity in enameled wires under PWM-like voltage waveformsIEEE Transactions on Dielectrics and Electrical Insulation11(3)393405
5. Mabye A Bellomo J P Lebey T et al.Electrical stresses applied to stator insulationin low-voltage induction motors fed by PWM drives. IEE ProceedingsElectric Power Applications 1997 144(3)191198
6. Bidan P lebey T Montseny G et al.Transient voltage distribution in inverter fed motorwindings experimental study and modelingIEEE Transactions on Power Electronics 2001 16(1)92100
7. Hyypio D B Simulationof cable and winding response to steep fronted voltage wavesProceedings of the 1995 Industry Applications Society Conference Orlando: FL1800806
8. Gubbala L von Jouanne A Enjeti P et al.Voltage distribution in the windings of an Ac motorsubjected to high dv/dt PWM voltages. 26th Annual IEEE Power ElectronicsSpecialists ConferenceUSA : Atlanta 1995 1579585
9. Suresh G Toliyat H A Rendusara D A Predicting the transient effects of PWM voltage waveformon the stator windings of random wound induction motorsIEEE Transactions on Power Electronics 1999 14(1)2330
10. Guardado J L Carrillo V Cornick K J Calculation of interturn voltages in machine windings duringswitching transients measured on terminalsIEEE Transactions on Energy Conversion 1995 10(1)8794
11. Petrarca C Maffucci A Tucci V et al.Analysis of the voltage distribution in a motorstator winding subjected to steep-fronted surge voltages by meansof a multiconductor lossy transmission line modelIEEE transactions on Energy Conversion 2004 19(1)717
12. Narang A Gupta B K Dick E P et al.Measurement and analysis of surge distribution inmotor stator windingsIEEE transactionson Energy Conversion 1989 4(1)126134
13. Skibinski G Kerkman R Leggate D Reflected wave modeling techniques for PWM AC motor drives.Applied Power Electronics Conference and ExpositionUSA:Anaheim 1998 210211029
14. Xian Z L Jiang J G Cao H X The effect of structure and frequency characteristic ofdielectric constant on capacitance of electrical machine stator windingProceedings of the CSEE 2004 24(8)129133 (in Chinese)
15. Ma H F Xu D G Chen X Y et al.Research of voltage reflection of PWM inverter-fedinduction motor with long motor leadsProceedingsof the CSEE 2001 21(11)109113 (in Chinese)
16. Liu X Z Xu C X Suppression of overvoltageacting on the terminal of PWM inverter-fed motorProceedings of the CSEE 2001 21(8)8488 (in Chinese)
17. Wan J R Lin Z Q Yu H J Research on motor terminal over-voltage caused by high-frequencyPWM pulseProceedings of the CSEE 2001 21(11)4347 (in Chinese)