Enhanced Stray-Load Loss Measurements Through a Zigzag Variable Load Test Approach
| Autor: | Alberto Tenconi, Emmanuel Agamloh, Andrea Cavagnino, Silvio Vaschetto |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
temperature test
Stator Computer science Instrumentation 02 engineering and technology 01 natural sciences Temperature measurement Industrial and Manufacturing Engineering law.invention law Control theory Efficiency IEC 60034-2-1 IEEE Std 112-B induction motor) no-load test stray-load losses (SLL) temperature test variable load test 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Point (geometry) Electrical and Electronic Engineering no-load test 010302 applied physics variable load test Variable load 020208 electrical & electronic engineering induction motor) IEEE Std 112-B IEC 60034-2-1 Test (assessment) Zigzag Control and Systems Engineering stray-load losses (SLL) Induction motor Efficiency |
| Zdroj: | IEEE Transactions on Industry Applications. 57:226-235 |
| ISSN: | 1939-9367 0093-9994 |
| Popis: | This article proposes an enhanced procedure for executing the standard variable load test that allows obtaining high correlation factors for indirectly measured stray-load loss during efficiency tests of induction motors. This helps to achieve the minimum values required by the international standards to consider the variable load test well executed, avoiding unwelcome test repetitions and leading to significant amount of time saved. With the machine at steady-state temperature, the enhanced procedure consists of alternatively applying load levels higher and lower than the rated load, so that the stator winding temperature zigzags around the rated value. Hence, multiple readings can be performed for each load point, having the machine in isothermal conditions. This allows averaging many measurements of the same load point to mitigate the impact of instrumentation and reading errors. The article includes load tests conducted on different induction motor sizes and pole counts, applying both the standard variable load test procedure and the proposed approach. The experimental results show that the proposed technique allows achieving higher correlation factors on the stray-load losses than the standard procedure. |
| Databáze: | OpenAIRE |
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