熱的鉄損測定を用いたレーザカット加工を施した電磁鋼板の鉄損分布の評価

抄録

　It is well known that magnetic properties deteriorate and iron losses increase due to strains induced in motor cores made of electrical steel sheets during those manufacturing process. We have developed a thermal measurement system of the iron loss distributions with a thermography camera in order to clarify the deterioration degree of the magnetic properties depending on different processing methods. In this paper, firstly the iron loss distributions in rectangular specimen of the electrical steel sheet cut with different cutting methods are measured with the thermal measurement system and those results are compared. Two cutting methods are used in this investigation; the wire electric discharge cutting and laser cutting processing. It was clear that iron losses increase due to laser cutting in this paper.