Single-phase unity power factor rectifier with improved dynamic response for non-linear load

Abstract: In this paper, a robust controller asserting a unity power factor rectifier is studied. The inner current control loop is a hysteresis type with switching frequency kept below a maximum imposed value; the harmonics generated are spread in certain range below the maximum imposed frequency and thus reducing the electromagnetic interference. The voltage controller feed-forwards the information about the dc output power to improve the dynamic response for any type of dc load. To demonstrate the improved response of the voltage regulator, a buck regulator as non-linear load drawing approximately 2.5 kW, is used