Abstract
In this paper, the feasibility of using an estimate of the stator resistance (R s) as an indicator of stator winding temperature (T s) is evaluated. The advantages of resistance-based temperature monitoring over conventional thermal model-based methods are presented. Since obtaining an accurate estimate of R s is critical for this approach, an investigation of existing R s estimation schemes, and an analysis showing the sensitivity of model-based R s estimation due to the uncertainties in motor parameters and variables, are given. It is shown that R s estimation is difficult during high-speed operation, because estimated R s becomes sensitive to errors in motor electrical parameters and variables, as the input excitation frequency (speed) increases. A new R s estimation scheme for the purpose of monitoring the temperature in steady state is proposed. Experimental results on a line-connected induction machine verify the validity of the proposed method and the analysis.
Original language | English |
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Pages (from-to) | 7-15 |
Number of pages | 9 |
Journal | IEEE Transactions on Energy Conversion |
Volume | 17 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2002 Mar |
Externally published | Yes |
Bibliographical note
Funding Information:Manuscript received May 12, 2000. This work was supported by Eaton Corporation Innovation Center.
Keywords
- Induction motor
- Rotor resistance estimation
- Stator resistance estimation
- Temperature estimation
- Thermal model
- Thermal protection
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering