Semi-analytical Method for Predicting Shaft Voltage in Field-excited Synchronous Generators


Vol. 14, No. 5, pp. 859-865, Sep. 2014
10.6113/JPE.2014.14.5.859


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 Abstract

This study presents an electromagnetic model for predicting shaft voltages in a 2-pole field-excited synchronous generator. Afterthe first observations on shaft voltages were made more than a century ago, extensive work has been conducted on eliminating,mitigating, and integrating the aforementioned phenomena. Given that emphasis has been placed on modeling shaft- andbearing-induced voltages in AC motors driven by variable frequency drives, similar efforts toward a model that is dedicated togenerators are insubstantial. This work endeavors to improve current physical interpretation and prediction methods forshaft-induced voltages in generators through semi-analytical derivation. Aside from the experimental validation of the model,investigations regarding the behavior of shaft voltages under varying machine complexities and operating conditions clarify previousuncertainties regarding these phenomena. The performance of the numerical method is also assessed for application in eccentricityfault diagnosis.


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Cite this article

[IEEE Style]

W. Doorsamy and W. A. Cronje, "Semi-analytical Method for Predicting Shaft Voltage in Field-excited Synchronous Generators," Journal of Power Electronics, vol. 14, no. 5, pp. 859-865, 2014. DOI: 10.6113/JPE.2014.14.5.859.

[ACM Style]

Wesley Doorsamy and Willem A. Cronje. 2014. Semi-analytical Method for Predicting Shaft Voltage in Field-excited Synchronous Generators. Journal of Power Electronics, 14, 5, (2014), 859-865. DOI: 10.6113/JPE.2014.14.5.859.