Voltage and current stress reduction in single-stage power factor correction AC/DC converters with bulk capacitor voltage feedback

Quasi‐active power factor correction on flyback‐based dc/dc converter

“…The topologies proposed in [15], [16], [24] and [27] present a PFC circuit with THD slightly below the IEC 61000-3-2 Class D limits. Reference [16] gives the highest THD which indicates that Class D limit is around 87%. It may be seen that the main advantages of the proposed converter over the other topologies are: (1) high quality input current with the lowest THD (20%), (2) operation of input inductor current in CCM/DCM, and hence a small size of the EMI input filter is required, (3) high efficiency (74%-94%) and (4) simplicity.…”

“…The maximum dc bus capacitor voltage in the proposed converter is 430 V for V in = 240 V, and it can be maintained always below 450 V by tuning the number of turns (n 1 , n 3 ) and the inductance ratio L m /L 4 . Although the voltage stress of the converters in [15], [16] and [24] is lower than 400 V, the THD is considerably high. If the lower dc bus capacitor voltage is the proposed Easily meet Class D without any dead angle in the line current, CCM/DCM, THD = 22% N au / N p < 1 V B = 420 V, it is controlled by the N au /N p and L m /L in main objective, then the proposed converter can certainly be designed to achieve a voltage stress lower than 430 V at the cost of slightly higher THD.…”

“…Finally, Table I summarizes the comparison of several single-stage ac/dc converters presented in [15], [16], [24], [27] and [31] with the proposed converter in terms of circuit implementation and performance. The topologies proposed in [15], [16], [24] and [27] present a PFC circuit with THD slightly below the IEC 61000-3-2 Class D limits. Reference [16] gives the highest THD which indicates that Class D limit is around 87%.…”

Design of Mono Stage Luo Converter for Electric Vehicles Charging System

“…The battery supplies the input to converter which is stabilized and improved with the help of inductor [8]. The AC/DC converters with bulk capacitors are used to reduce the voltage and current stress through power factor correction process [9]. In [10], an isolated single-stage ZCS current fed converter with full-bridge topology is presented for high power AC to DC applications.…”

“…Single-stage PFCs suffer from high voltage stress, a new approach is discussed to suppress the bus capacitor voltage range due to variation in load current [15]. The voltage and current stress in PFC is reduced by utilizing a bulk capacitor [16]. A non-isolated high step up DC-DC converter with minimized voltage stress and soft switching is presented in [17].…”