電磁環境の立場から見たスイッチング電源の妨害雑音について

Abstract

近来, 開関電源己非常広地被用作為個人計算機電源。開関電源具有体積小, 重量軽, 効率高第一系列優点。但是由於使用了高速開関電路, 産生数兆赫, 甚致更高頻率的電磁干擾。筆者参照日本電気通信技術審議会答申和国際電波障害特別委員会公刊, 就市販的典型的開関電源的伝導雑音以及輸出雑音等進行了仔細的調査和実験。

Recently, switching power supplies have been widly used as power sources of personal computer etc. The switching power supply has merits such as small size, light weight, high efficiency and others. However, its high speed switching action causes electromagnetic interference of many frequencies, covering more than several MHz. The authors have made closer investigations on the conducted EMI, and output noise of typical switching power supplies in the market, as refered to Report of JTTC (Japan Telecommunication Technical Counsil) and Publication of CISPR (Comite International Special des Perturbation Radioelectriques).