Design and improvement of a soft switching high step‐up boost converter with voltage multiplier

Abstract

A new soft switching high step-up boost converter is proposed in this study. Coupled inductors technique is used along with voltage multiplier in order to provide high-voltage gain and reduce voltage stress across semiconducting elements. Using an active clamp circuit, soft switching condition is provided for both the main and auxiliary switch which reduces the switching losses and improves the circuit efficiency as well as power density. The reverse recovery problem of diodes is alleviated due to the existence of the leakage inductances of the coupled inductors in series with diodes. The circuit performance is investigated and theoretical analysis is provided. A 200 W 40 V input to 400 V output laboratory prototype of the proposed converter is implemented, and the experimental results show the proper performance of the proposed converter.

Nonisolated High Step-Up DC–DC Converters: Comparative Review and Metrics Applicability

“…1) Regardless of different nominations such as charge pump [143,156], voltage lift [99], self-lift, VMC [20,21,25,32,33,58,75,82,94,97], voltage multiplier rectifier [22], ladder cell [168], voltage doubler [30,81,96,120,130,141] and voltage quadrupler [22,43] in previous literature, any network with capacitors and semiconductors to increase the voltage level is uniformly named as SC in this paper. The same rule is also followed for the SIs, the networks with inductors and semiconductors.…”

“…Soft switching is a dominant approach to suppress switching loss which is accomplished by resonant tanks [33,183,203], active resonant cells [46,57], inductors in series with semiconductors [171,235], clamp circuits [13,16,22], capacitors parallel with semiconductors [27], and leakage energy recycling [77,119,120,132,147]. However, it increases the conduction loss due to auxiliary components, and intensifies the semiconductors voltage stress due to highfrequency ringing between the parasitic and resonance components which highlight the significance of optimized operation and design region to reach low total power loss.…”

“…Hence, some approaches have been introduced in literature to alleviate or eliminate the aforementioned obstacles, and coping with them can be considered as a valuable criterion which affects the converter power loss, components stresses, cooling system size and cost. Among these approaches, the followings are the most applicable: ZCS in the turn-off transition [130,133,141,142,145,148,168,208,223], smooth turn-off due to inductive current [171,235], placement of a coupled inductor leakage inductance in series with diodes [1,77,119,120,121,122,130,131,132,147,222], usage of resonant or quasi resonant tanks [11,117,128,201], control-base solutions like operation in low duty cycles [44,115,134], employment of SiC diodes [212] (Note that, SiC diodes have higher forward voltage drop. ), and capability of using fast recovery diodes due to low voltage stress across diodes [118,123,137,173].…”

Design and Implementation of Finite Time Nonsingular Fast Terminal Sliding Mode Control for a Novel High Step-Up DC-DC Converter

“…The soft switch techniques [12] can recycle the leakage energy of magnetic elements, but at the price of increasing topology complexity. A voltage multiplier cell is a selectable option [13], which can not only alleviate voltage stress, but also improve the voltage gain.…”