Power quality improvement by interleaving unequal switching converters

Abstract

Interleaved switching converters are used in several applications such as power source for a PC microprocessor, one of their advantages is the capability to cancel a portion of the current ripple generated by the switching action, in the output for a buck case and in the input for a boost case. Depending to the voltage gain the operate, that current ripple can be equal to zero. Interleaving connections are made with converters of the same topology, this work explores the interleaving connection of unequal topologies Boost and Cuk, the objective is to develop an interleaving boost topology to reduce the total harmonic distortion at the input current in the full operating range, the input current ripple represents the power quality of switching mode power supplies from the input source point of view. The combined converter achieves a larger voltage gain compared with the traditional boost converter but their main advantage is the extra degree of freedom on reducing the input current ripple for certain operating conditions. Experimental results are provided to verify the theoretical analysis and prof the principle of operation.

Unified Evolutionary Algorithm Framework for Hybrid Power Converter

“…For instance, a double-phase interleaved boost converter exhibits zero input-current ripple. Furthermore, hybrid interleaved converters such as the one described in [34] are being investigated. It is feasible to select a zero input-current ripple for this converter.…”

“…This enables it to operate in the best operating range. Unlike the conventional interleaving converters with an identical duty cycle for all converters, a hybrid converter [34] employ a PWM strategy to assign a duty cycle to each converter. The duty cycles are dependent.…”

“…However, it has drawbacks because it loses a degree of freedom when a duty cycle is proportional to another over the entire range of operations. Considering this limitation in [34], a new PWM strategy was proposed in [31]. The duty cycles can be represented as in Equation (8).…”

Interleaved PFC balance charger with passive lossless snubber for series-connected batteries

“…The required EMI filter can also be reduced because of the reduced current ripple. To achieve unity power factor, a common topology composed of a EMI filter, a full-bridge diode rectifier and a DC converter operated in DCM was usually adopted for reducing the complexity of feedback controller [18][19][20][21][22][23][24].…”