Surge Test-based Identification of Stator Insulation Component with PD Activity for Low Voltage AC Motors

Sang Bin Lee, Alireza Naeini, Shesha Jayaram, Greg C. Stone, Mladen Sasic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Partial discharge (PD) has been identified as one of the root causes of stator insulation failure even for low voltage (LV) ac motors. For reliable operation of variable frequency drive (VFD) motors, a standard acceptance test procedure (IEC STD 60034-18-41) to ensure PD-free operation of LV motors was recently developed. Although the test can verify whether PD exists in the stator for a voltage surge with predetermined voltage level and risetime, the information on where PD activity is present in the stator insulation is not clearly provided. In this paper, a test method for applying variable risetime surge voltage is proposed for identifying the component of stator insulation where PD occurs in the LV random wound motor stator. The proposed test allows the user to locate whether PD is in the turn, phase, or ground insulation. This information is critical for lowering the PD inception voltage for improving the motor reliability through insulation system design/manufacturing or motor/drive system reconfiguration. The test is implemented with a 4.5 kV variable risetime surge generator prototype, and 4 LV ac motors are tested to show where PD is likely to occur in commercial LV motors.

Original languageEnglish
Title of host publicationProceedings of the 2019 IEEE 12th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-7
Number of pages7
ISBN (Electronic)9781728118321
DOIs
Publication statusPublished - 2019 Aug
Event12th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2019 - Toulouse, France
Duration: 2019 Aug 272019 Aug 30

Publication series

NameProceedings of the 2019 IEEE 12th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2019

Conference

Conference12th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2019
CountryFrance
CityToulouse
Period19/8/2719/8/30

Keywords

  • AC motors
  • Impulse testing
  • Insulation testing
  • Partial discharge (PD)
  • Surges

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Safety, Risk, Reliability and Quality

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  • Cite this

    Lee, S. B., Naeini, A., Jayaram, S., Stone, G. C., & Sasic, M. (2019). Surge Test-based Identification of Stator Insulation Component with PD Activity for Low Voltage AC Motors. In Proceedings of the 2019 IEEE 12th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2019 (pp. 1-7). [8864864] (Proceedings of the 2019 IEEE 12th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/DEMPED.2019.8864864