Designing single-stage power factor correctors and LC passive filters to comply with the new version of the IEC 1000-3-2 regulations

Abstract

The design of low-cost power supplies is influenced by the regulations on the low-frequency harmonic content in the line. As IEC 1000-3-2 regulations have just been modified, the design procedure of low-cost power supplies should also be modified. According to the new version of the above-mentioned regulations, many power supplies classified as Class D in the past are classified as Class A now. This fact allows a remarkable saving in the sue of the reactive elements used to reduce the line harmonics if they have been properly designed. The minimum values of the magnetic elements used in two well-known PFC solutions (one is an S2PFC and the other is a passive fdter) have been obtained in this paper for equipment classified in both the new Class A and the new Class D and for any power level between 75W and 600W.