Power factor correction circuit with a new modified SEPIC converter

Power Factor Correction With a Modified Sheppard–Taylor Topology Operating in Discontinuous Capacitor Voltage Mode and Low Output Voltage

“…This problem is avoided in single-stage Buck-Boost-type topologies such as the Single-Ended Primary Inductance Converter (SEPIC) [21][22][23][24][25][26][27][28][29]. Although it can offer low voltage stress at the output, this converter suffers, as the Boost does, from the control detuning phenomenon, i.e., the inability of the source current to track its reference at the zero-crossings of the source voltage [30][31]. In order to overcome this drawback, other Buck-Boost PFC circuits based on the Sheppard-Taylor converter were proposed in the literature [30][31][32][33][34][35][36][37][38][39][40][41][42].…”

“…Although it can offer low voltage stress at the output, this converter suffers, as the Boost does, from the control detuning phenomenon, i.e., the inability of the source current to track its reference at the zero-crossings of the source voltage [30][31]. In order to overcome this drawback, other Buck-Boost PFC circuits based on the Sheppard-Taylor converter were proposed in the literature [30][31][32][33][34][35][36][37][38][39][40][41][42]. The modified Sheppard-Taylor PFC topology, which is based on the combination of a SEPIC with a conventional Sheppard-Taylor converter, solves the detuning problem while keeping the polarity of the output voltage the same as the source [30][31][32][33][34]; whereas the conventional Sheppard-Taylor topology provides an inverted output polarity [35][36][37][38][39][40][41][42].…”

“…The modified Sheppard-Taylor PFC topology, which is based on the combination of a SEPIC with a conventional Sheppard-Taylor converter, solves the detuning problem while keeping the polarity of the output voltage the same as the source [30][31][32][33][34]; whereas the conventional Sheppard-Taylor topology provides an inverted output polarity [35][36][37][38][39][40][41][42]. The modified Sheppard-Taylor based PFC was first introduced in [30]. In this study, the converter was used for power factor correction in a single-phase diode rectifier with a Discontinuous Inductor Current Mode and a Continuous Capacitor Voltage Mode (DICM/CCVM) of operation.…”

Design and implementation of a modified Sheppard-Taylor Power Factor Corrector operating in Discontinuous Capacitor Voltage Mode and very low output voltage level

“…This solution gives similar performance but suffers, as the Boost does, from the control detuning phenomenon that is characterized by the inability of the AC current to track its reference at each zerocrossing of the mains voltage. This problem is avoided when using more elaborated Buck-Boost-type of PFC based on the SEPIC and Sheppard-Taylor topologies [12][13][14][15][16]. This topology solves the detuning problem while keeping a DC voltage polarity same as the source; whereas the conventional Sheppard-Taylor topology provides inverted DC bus [17][18][19][20][21][22][23][24].…”

“…The modified Sheppard-Taylor based PFC was first introduced in [12]. In this study, the converter was used for power factor correction in a single-phase diode rectifier with a Discontinuous Inductor Current Mode and a Continuous Capacitor Voltage Mode (DICM/CCVM) of operation.…”