A Study on the Development of A Rectifier Unit for Telecommunication Equipments with Free Input-Voltage Regulations

Free Voltage Regulation기능을 갖는 교환기용정류기 개발에 관한 연구

This paper deals with a $3{\phi}$ rectifier unit for telecommunication system. The rectifier unit is developed to Cope with the step-up of the AC input voltatage from 220V to 380V. By using a buck-type converter in the front-end, it keeps the input power factor high and reduces the voltage ripple in the dc output. It also has a very wide voltage regulation range, which lets the unit be applied for both the 220V and 380V input system. The study includes the power conversion scheme, control strategy, snubber circuit and finally, experimental results.