Journal of international Conference on Electrical Machines and Systems

  • 제3권3호
  • /
  • Pages.241-247
  • /
  • 2014
  • /
  • 2234-6902(pISSN)
  • /
  • 2234-7577(eISSN)
대한전기학회 분과 (Journal of International Conference on Electrical Machines and Systems)
권호 표지
DOI QR코드

DOI QR Code

Approaches to Suppressing Shaft Voltage in Non-Insulated Rotor Brushless DC Motor driven by PWM Inverter

  • Isomura, Yoshinori (Motor Business Division, Appliances Company, Panasonic Corporation) ;
  • Yamamoto, Kichiro (Dept. of Electrical and Electronics Engineering, Kagoshima University) ;
  • Morimoto, Shigeo (Dept. of Electrical and Information Systems, Graduate School of Engineering, Osaka Prefecture University) ;
  • Maetani, Tatsuo (Motor Business Division, Appliances Company, Panasonic Corporation) ;
  • Watanabe, Akihiko (Motor Business Division, Appliances Company, Panasonic Corporation) ;
  • Nakano, Keisaku (Motor Business Division, Appliances Company, Panasonic Corporation)
  • 투고 : 2013.12.27
  • 심사 : 2014.02.11
  • 발행 : 2014.09.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The voltage source PWM inverter generally used to drive the air conditioning (A/C) fans has been posing a large issue that the bearings in air conditioning fan motors are highly possible to be corroded electrically. Potential difference called shaft voltage is generated between inner and outer rings of the bearings due to inverter switching. The shaft voltage causes bearing lubricant breakdown dielectrically. As a result, bearing current is caused. This current causes the bearing corrosion. In previous work, we demonstrated that the shaft voltage can be reduced by using an insulator inserted between the outer and inner cores of the rotor in an air conditioning fan motor without grounding. This paper proposes the other countermeasure for reducing the shaft voltage in fan motors. The countermeasure which adds a capacitor between the brackets and the stator core is effective even for fan motors with non-insulated rotor. The effectiveness is confirmed by both simulated and experimental results.

키워드

참고문헌

  1. S. Chen, T. A. Lipo, and D. Fitzgerald, "Modeling of Motor Bearing Currents in PWM Inverter Drives.," IEEE Trans. Ind. Appl., Vol. 32, No. 6, pp. 1365-1370 (1996-11/12) https://doi.org/10.1109/28.556640
  2. D. F. Busse, M. E. Erdman, R. J. Kerkman, D. W. Schlegel, and G. L. Skibinski, "An Evaluation of the Electrostatic Shielded Induction Motor, A Solution for Rotor Shaft Voltage Buildup and Bearing Current," IEEE Trans. IA, Vol. 33, No. 6, pp. 1563-1570 (1997-6)
  3. S. Ogasawara, H. Ayano, and H. Akagi, "Active Cancellation of the Common-mode Voltage Produced by a Voltage-Source PWM Inverter," IEE-Japan Trans. IA, Vol. 117-D, No. 5, pp. 565-571 (1998-5)
  4. K. Yamada, H. Kirino, M. M. Swamy, and T. Kume, "Common-mode Current Attenuation Techniques for Use with PWM Drives," Proc. of the 1999 Japan Industrial Application Society Conference, Vol. III, pp. 75-78 (1999)
  5. K. Iimori, K. Shinohara, K. Yamamoto and A. Morigami, "Approaches to Suppressing Shaft Voltage in Brushless DC Motor Driven by PWM Inverter," IEE-Japan Trans. IA, Vol. 127-D, No. 4, pp. 406-411 (2007-4)
  6. T. Maetani, S. Morimoto, K. Iimori, Y. Isomura and A. Watanabe, "Approaches to Suppressing Shaft Voltage in Brushless DC Motor Driven by PWM Inverter," ICEMS 2011, Beijing, Aug. 20-23, PS-PMM-53 (2011)
  7. K. Tagami, S. Ogasawara, H. Funato, H. Kanazawa, M. Uesugi, and K. Moizumi, "Analysis of Shaft Voltage and Bearing Current in an Inverter-Fed Nongrounded Motor," IEE-Japan Trans. IA, Vol. 127-D, No. 3, pp. 286-292 (2007-3)
  8. A. Muetze and A. Binder, "Calculation of Motor Capacitances for Prediction of the Voltage Across the Bearings in Machines of Inverter-Based Drive Systems," IEEE Trans. IA, Vol. 43, No. 3, pp. 665-672 (2007-5/6)
  9. R. Naik, T. A. Nondahl, M. J. Melfi and R. Schiferl, "Circuit model for shaft voltage prediction in induction motors fed by PWM-based AC drives," IEEE Trans. Industry Applications, vol. 39, no. 5, pp. 1294-1299 (2003-9/10). https://doi.org/10.1109/TIA.2003.816504
  10. O.Magdum, Y. Gemeinder, and A. Binder, "Investigation of influence of bearing load and bearing temperature on EDM bearing currents," ECCE 2010, Atlanta, pp. 2733-2738, (2010-9).
  11. A. Muetze and A. Binder, "Calculation of Circulating Bearing Currents in Machines of Inverter-Based Drive Systems," IEEE Industrial Electronics, vol. 54, no.2, pp. 932-938, (2007). https://doi.org/10.1109/TIE.2007.892001
  12. A. Muetze, J. Tamminen, and J. Ahola, "Influence of Motor Operating Parameters on Discharge Bearing Current Activity," IEEE Trans. IA, Vol. 47, No. 4, pp. 1767-1777 (20119-7/8).
  13. T. Maetani, S. Morimoto, K. Yamamoto, Y. Isomura and A. Watanabe, "Influence of motor rotating speed on shaft voltage of brushless DC motor with insulated rotor driven by PWM Inverters," SPEEDAM 2012, Sorrento, June. 20-22, EMD0012 (2011)
  14. Y. Isomura, K. Yamamoto, S. Morimoto, T. Maetani, A. Watanabe and K Nakano, "Study of the Further Reduction of Shaft Voltage of Brushless DC Motor with Insulated Rotor driven by PWM Inverters," PEDS 2013, Kitakyushu, April. 23-25, pp1184-1189 (2013)