A remote and sensorless stator winding thermal protection scheme for line-connected AC machines

Sang Bin Lee, Thomas G. Habetler

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

2 Citations (Scopus)

Abstract

An advanced remote and sensorless thermal protection technique for line-connected AC machines is proposed in this paper. The proposed technique includes an algorithm for detecting abnormal cooling conditions due to reduced motor cooling ability in addition to a stator resistance (R s)-based stator temperature (T s) estimation scheme. The motor cooling ability monitoring algorithm can be implemented using the R s estimates of an existing dc injection-based R s estimation scheme without additional hardware or parameter information. In addition, the influence of the fuse, circuit breaker, and cable resistances on the R s estimate is investigated, and methods for compensation are suggested for improving the accuracy of the R s estimate, and therefore, the reliability of T s monitoring. Experimental results under various abnormal cooling conditions verify that the reduced cooling ability of the motor can be reliably detected and that it can be used in addition to the T s estimate for complete motor thermal protection.

Original languageEnglish
Title of host publicationConference Record - IAS Annual Meeting (IEEE Industry Applications Society)
Pages1517-1524
Number of pages8
Volume3
Publication statusPublished - 2002
Externally publishedYes
Event37th IAS Annual Meeting and World Conference on Industrial applications of Electrical Energy - Pittsburgh, PA, United States
Duration: 2002 Oct 132002 Oct 18

Other

Other37th IAS Annual Meeting and World Conference on Industrial applications of Electrical Energy
CountryUnited States
CityPittsburgh, PA
Period02/10/1302/10/18

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Keywords

  • Abnormal cooling situations
  • AC machines
  • Condition monitoring
  • Diagnostics
  • Reduced motor cooling ability
  • Stator resistance estimation
  • Thermal protection

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Lee, S. B., & Habetler, T. G. (2002). A remote and sensorless stator winding thermal protection scheme for line-connected AC machines. In Conference Record - IAS Annual Meeting (IEEE Industry Applications Society) (Vol. 3, pp. 1517-1524)