A Novel Full Soft-Switching High-Gain DC/DC Converter Based on Three-Winding Coupled-Inductor

Abstract

In this paper, a new non-isolated full soft-switching step-up DC/DC converter is introduced with a continuous input current for renewable energy applications. The use of a Three-Winding Coupled-Inductor (TWCI) along with a Voltage Multiplier (VM), enables the proposed converter to enhance the voltage gain with lower turns ratios and duty cycles. Also, a lossless regenerative passive clamp circuit is employed to limit the voltage stress across the power switch. In addition to Zero Current Switching (ZCS) performance at the turn-on instant of the power switch, the turn-off current value is also alleviated by adopting a Quasi-Resonance (QR) operation between the leakage inductor of the TWCI and middle capacitors. Moreover, the current of all diodes reaches zero with a slow slew rate, which leads to the elimination of the reverse recovery problem in the converter. Soft-switching of the power switch and all the diodes in the proposed converter significantly reduces the switching power dissipations. Therefore, the presented converter can provide a high voltage gain ratio with high efficiency. Steadystate analysis, comprehensive comparisons with other related converters, and design considerations are discussed in detail. Finally, a 160 W prototype with 200 V output voltage is demonstrated to justify the theoretical analysis.

Improved Quadratic Boost High-Gain DC-DC Converter Based on Constant Off-Time Control Mode

“…A wide range of portable electronic lifestyle products such as smartphones, tablets, personal digital assistants (PDAs), and handheld electronic devices have become part of people's working life, and the working duration of these electronic devices is directly determined by the power supply. Most of the portable electronic products on the market today are powered by a single lithium battery, which has the disadvantage of an unstable charge/discharge characteristic curve [2]. To ensure that the drive voltage of the sub-circuit modules in the system is constant, a regulated power supply module needs to be added between the sub-circuit and the lithium battery [3].…”

A Novel Single-Switch High Step-Up DC–DC Converter with Three-Winding Coupled Inductor

“…For demonstrating the performance of the proposed converter, it is compared with other related converters presented in [12,14,16,18,25,27,[32][33][34][35]. In this study, the turns ratio…”

“…VMCs are usually cell-based structures, presented after the main switch to decrease its voltage stress. Due to the arrangements of semiconductors, capacitors and inductors, VMCs are able to provide high voltage gain with a low component count, as presented in [17][18][19][20]. Due to their modular structure, various VMCs can be cascaded to achieve a higher gain [12,21].…”

“…The voltage gain is obtained due to the capacitive energy transfer, but at the cost of a high number of components. Moreover, SCs can be used along with coupled inductors to further increase the static gain [18,[25][26][27][28][29][30].…”

“…Furthermore, it can reduce the reverse recovery losses of diodes due to hard switching. Soft-switching conditions are found in [18,31,32], where the semiconductor components operate with ZCS.…”