Control of Rotating Magnetic Flux Distribution in a Transformer Model Core by Laser Irradiation
| Autor: | Keiichiro Ooka, Toshiya Kajiwara, Masato Enokizono, Shigeru Aihara |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Magnetic energy Electromagnet business.industry Magnetic flux Electronic Optical and Magnetic Materials law.invention Magnetic circuit Search coil Nuclear magnetic resonance Optics Magnetic core law Amorphous metal transformer Magnetic pressure Electrical and Electronic Engineering business |
| Zdroj: | IEEE Transactions on Magnetics. 50:1-4 |
| ISSN: | 1941-0069 0018-9464 |
| DOI: | 10.1109/tmag.2013.2286630 |
| Popis: | To reduce power loss of transformers further from now on and to raise efficiency, we have measured magnetic property distributions in a three-phase tripod V-connection transformer model core. For the measurement, we have developed a localized vector magnetic property measurement system consisting of a three-axis positioning system, a vector magnetic sensor (V-H sensor), and PC. The measured results showed that rotational magnetic fluxes with a large axis ratio were generated in the V-junction parts of the transformer model core, and large iron loss was observed. To reduce the iron loss near the V-junction parts, we have tried to change local magnetic characteristics of the electrical steel sheet near the V-junction parts by using laser irradiation. The effect of the laser irradiation on the local magnetic properties is evaluated by measuring distributions of the local magnetic properties. |
| Databáze: | OpenAIRE |
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