New Single‐Switch quadratic boost DC/DC converter with Low voltage stress for renewable energy applications

Abstract

In this paper, a novel non-isolated Single-Switch Quadratic Boost Coupled-Inductor (SSQBCI) DC/DC converter with continuous input current and low voltage stress on the switching component is presented. The suggested structure is based on the traditional quadratic boost converter. In this new topology, to achieve an ultra-high voltage gain without large duty cycle, a Coupled-Inductor (CI) along with a Voltage Multiplier (VM) are employed. The magnetic energy stored in the leakage inductor of the CI is recycled by a regenerative passive clamp capacitor that is connected with the switch in parallel, which helps to limit the maximum voltage across the switch. Therefore, to reduce the switch conduction loss and improve the efficiency, a switch with the low static drain-to-source ON-resistance can be used. Moreover, the low voltage stress on the output side diode alleviates the reverse recovery loss. The steady-state operating principle, comparisons with other related topologies and also design considerations in Continuous Conduction Mode (CCM) will be analyzed in detail. Finally, the performance of the proposed SSQBCI is verified by experimental results using a prototype with 30V input and 200V-160 W output operation at a constant switching frequency 50 kHz.

Adaptive neuro-fuzzy approach for maximum power point tracking with high gain converter for photo voltaic applications

“…Irrespective of the various networks implemented in recent studies, the addition of coupled inductor along with a VMC cell is proven to achieve ultra-high gain without operating the switch at the extreme duty ratios. Even though the switch stress is minimized, the input and magnetizing inductors are facing high dissipation losses than other elements [26]. This study discusses about ultravoltage gain DC-DC converter with an active impedance network to reduce the switch burden.…”

Ultrahigh step‐up DC‐DC converter consisting quadratic boost converter, multiplier cell, and three windings coupled inductor

“…Thus, high step-up DC-DC converters have been investigated in recent years. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] In order to increase applications of RESs, this kind of converters ought to convert voltage with ultrahigh gain respecting to the other necessary quality factors. Because of simple structure of conventional boost converter (CBC), it seems as the first suitable choice for stepping up voltage of RESs.…”

“…Therefore, the studies are performed on combinations of the converters with boosting voltage techniques that improve voltage gain in lower duty cycles to prevent the negative effect. To approach higher voltage level, some boosting circuits such as switched capacitor, 21 coupled inductor, [1][2][3][4][5][6][7][8][9][10]16 multiplier cell, 13 and high frequency transformers 11,13 have been added to DC-DC converters frequently. Cascading and interleaving 18 are the two well-known stepping up techniques, each with its own advantages and disadvantages.…”

“…18 Two of the other wildly used techniques in high step-up DC-DC converters are switched capacitor and multiplier cells. 13,21,22 The components related to these techniques usually are located on the output side of the converters and combined with other methods. They effectively add a coefficient of two or three to the voltage gain of the converters with low number of components, being the main reason of utilizing them in high step-up converters.…”

“…Utilizing two power switches reduces voltage stress on the switches because of distributing voltage stress on them. 13 Various studies have proposed modified structures of quadratic boost converters 20,[23][24][25][26] due to its flexibility for new combinations, continuous input current, existence a ground between the load and source, and noticeable voltage gain for being used as the base of new configurations. Z-source and quasi Z-source converters are the two other kinds of converters for high step-up applications plus to the utilization of them in hybrid inverters.…”