International standards for the induction motor efficiency evaluation: A critical analysis of the stray-load loss determination

被引:83
作者
Boglietti, A [1 ]
Cavagnino, A [1 ]
Lazzari, M [1 ]
Pastorelli, M [1 ]
机构
[1] Politecn Torino, Dipartimento Ingn Elettr Ind, I-10129 Turin, Italy
关键词
efficiency; induction motors; international standards; stray-load losses;
D O I
10.1109/TIA.2004.834034
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Motor efficiency has to be measured or calculated in accordance with international standards. the most important standards are the IEEE 112-B, IEC 34-2, and JEC 3. In this paper, a comparison of the measurement procedures defined by these international standards is reported, together with some comments on the prescribed methodologies. The comparison is based on experimental results obtained by tests on four general-purpose three-phase induction motors. The stray-load loss measurement represents it critical key for the correct evaluation of the motor efficiency. For this reason, a critical analysis of this type of losses has been performed. In particular, in order to understand which are the most critical quantities that influence their evaluation, the stray-load loss sensitivity to the measurement errors is analyzed. In the final part of the paper the temperature influence, on the conventional iron losses, is experimentally analyzed. The performed tests show that the temperature difference between the no-load test and the motor real operative conditions is not negligible.
引用
收藏
页码:1294 / 1301
页数:8
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