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

Sang Bin Lee, Thomas G. Habetler

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

An advanced remote and sensorless thermal protection technique for small 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 (Rs)-based stator temperature (Ts) monitoring scheme. The motor cooling ability monitoring algorithm can be implemented using the Rs estimates of an existing dc-injection-based Rs estimation scheme without parameter information or additional hardware. In addition, the influence of the fuse, circuit breaker, and cable resistances on the Rs estimate is investigated, and methods for compensation are suggested for improving the accuracy of the Rs estimate and, therefore, the reliability of Ts monitoring. Experimental results under a number of 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 Ts estimate for complete motor thermal protection.

Original languageEnglish
Pages (from-to)1323-1331
Number of pages9
JournalIEEE Transactions on Industry Applications
Volume39
Issue number5
DOIs
Publication statusPublished - 2003 Sep 1
Externally publishedYes

Fingerprint

Cooling
Stators
Monitoring
Electric circuit breakers
Electric fuses
Cables
Hot Temperature
Hardware
Temperature

Keywords

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

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

Cite this

A remote and sensorless thermal protection scheme for small line-connected AC machines. / Lee, Sang Bin; Habetler, Thomas G.

In: IEEE Transactions on Industry Applications, Vol. 39, No. 5, 01.09.2003, p. 1323-1331.

Research output: Contribution to journalArticle

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