マエダ　トシテル   Toshiteru Maeda   前田　敏輝    所属   石巻専修大学  理工学部    職種   教授
言語種別	英語
発行・発表の年月	2009/08
形態種別	研究論文（学術雑誌）
査読	査読あり
標題	Analytical Model of Melting Phenomena for Breaking Relay Contacts
執筆形態	共著
掲載誌名	IEICE Transactions on Electronics
巻・号・頁	E92.C(8),pp.1003
総ページ数	5
著者・共著者	Noboru WAKATSUKI, Nobuo TAKATSU, Toshiteru MAEDA and Takayuki KUDO
概要	Using the transient current switch circuit in parallel with the energizing contacts, the slow decay of the contact current due to thermal fusion of metal was observed just after the contact voltage exceeded the melting contact voltage Um. At that time, the contact voltage was higher than the boiling contact voltage Ub. These results contradict Holm's φθ theory. A new melting model of breaking mechanical contact is proposed. The area surrounding a cluster of contacting a-spots melts, the melt metal diffuses, and the contact spot thermally shrinks. Including the metal phase transition from solid to liquid, the increase of contact resistance is introduced to the electric circuit analysis. The numerical analysis agrees qualitatively with measured V-I characteristics.
DOI	10.1587/transele.E92.C.1003