学位論文

非接触給電技術に関する基礎的研究

Fundamental study of contactless power suppliers

jpn

2011-03-24

Not Applicable (or Unknown)

2011-03-24

修士(工学)

工学研究科電気工学専攻; 指導教授: 斎藤兆古

All of the modern electrical devices are composed of two major parts: one is the electrical / electronic signal processing parts, and the other is the power suppliers. Recent electrical devices are spreading in use not only the conventional consumer electronic products but also electrical vehicles. A reason why electrical vehicles should be developed is simply the antipollution of earth atmosphere, i.e., the electrical motors employed instead of combustion type engines. The electrical vehicles require a battery system which should be charged up by an external power source. This means that a contactless power supplier is extensively convenient to practical use for battery charging of the electrical vehicles. Contactless power supplier is composed of a transformer having the distinct primal and secondary coils separated by air gap. Because of the electromagnetic compatibility problem, it is essential to keep the leakage magnetic fields around the contactless power supplier as low as possible. This paper carries out the wavelets multi-resolution analysis to the magnetic field distributions around contact less power supplier. As a result, we have succeeded in obtaining one of the core shape designing methodologies by observing the wavelets spectra of measured magnetic field vectors distributions. Furthermore, it is revealed that a tested trial transformer gives nearly 80 percent power transmission efficiency even though the primary and secondary coils are separated by 10mm air gap.

Thesis