A single switch high step-up DC-DC converter with three winding coupled inductor

Abstract

Summary A new high gain DC‐DC converter based on single switch and three‐winding coupled inductor is presented in this paper. Existence of a three‐winding coupled inductor in suggested topology has led to lift voltage gain by low number of windings' turn ratio. As a result, the main advantage of the proposed converter is to produce a high voltage gain without great values of duty cycle. The passive clamped technology is used in the proposed converter. It causes better performance for proposed converter by recycling the leakage inductance energy as well as restricting voltage stress by reducing great voltage spikes. In this paper, performance analysis and mathematical equations of the proposed converter are explained. In addition, variations of voltage gain as a result of leakage inductance and voltage and current stresses of power devices are studied, too. Moreover, performance of the suggested converter and the previously presented high gain ones are compared with together. Lately, a 200‐W prototype is constructed, and the experimental results approve the effectiveness of the proposed converter.

New family of expandable step‐up/‐down DC‐DC converters with increased voltage gain and decreased voltage stress on capacitors

“…These days, DC‐DC converters play a big role in diverse industrial applications . Up to now, various DC‐DC converters have been introduced .…”

“…These days, DC-DC converters play a big role in diverse industrial applications. [1][2][3] Up to now, various DC-DC converters have been introduced. [4][5][6] With introduction of converters as Zeta converter, Cuk converter, and SEPIC converter, high Abbreviations: SC, Switched capacitor; ESR, equivalent series resistance Symbols: C n , nth switched capacitor; C o , Filtering capacitor (output capacitor); D, Duty-cycle; D n , nth diode; f s , Switching frequency; G, ideal-state voltage gain (ideal-state voltage conversion ratio); G (real) , real-state voltage gain; I Co , Current across the filtering capacitor; I Cn , Current across the switched capacitors; I L1 , Current across the first inductor (L 1 ); I L2 , Current across the second inductor (L 2 ); I O , average output current; i L1 − min , minimum current of the first inductor; i L1 − max , maximum current of the first inductor; i L2 − min , minimum current of the second inductor; i L2 − max , maximum current of the second inductor; Δi L1 , First inductor's current ripple; Δi L2 , second inductor's current ripple; L 1 , First inductor; L 2 , Second inductor; M, ratio of voltage stress to output voltage; n, number of switched-capacitors; η, Efficiency of converter; R 1 , equivalent series resistance of the first inductor; R 2 , equivalent series resistance of the second inductor; S 1 , switch S 1 ; T n , nth T switch; T, One full cycle; V i , Ideal voltage source; V in , Input voltage; V O , Output voltage; V O(real) , Real-state output voltage; V GT , switching pulse for the T switches; V GS , switching pulse for the switch S; V Co , Voltage across the filtering capacitor; ΔV Co , Filtering capacitor's voltage ripple; V Cn , voltage across the nth switched capacitors; V Cn(real) , Real-state voltage across the nth switched capacitors; V Cn − max , maximum voltage of switched capacitors; V Cn − min , minimum voltage of switched capacitors; ΔV Cn , switched capacitors' voltage ripple; V L1 , Voltage across the first inductor; V L2 , voltage across the second inductor; V Dn , Voltage drop on nth diode; V S , Voltage drop on the switch S 1 ; V Tn , Voltage drop on nth T switch; V R1 , voltage drop on ESR of the first inductor; V R2 , voltage drop on ESR of the second inductor power applications were made possible because of their capability of providing high voltage gains.…”

A DC–DC boost converter with high voltage gain integrating three‐winding coupled inductor with low input current ripple

“…However, the voltage gain of this converter is higher. In order to reach higher voltage gain, three‐winding coupled inductor is used in some converters . In Reference , another high step up converter is presented.…”

“…The load is connected to the input source and one of the capacitors. In References 13 and 14, two converters with high voltage gain and coupled inductor with tree‐winding are presented. The presented converters have higher voltage gain and low number of components.…”

Cost‐efficient nonisolated three‐port DC‐DC converter for EV/HEV applications with energy storage

“…A dc-dc buck-boost converter based on Cuk topology Ali Ajami et al 1 utilizes additional inductors for providing either bucked output or boosted output. Buck-boost converters [1][2][3][4] are single-input single-output (SISO) model and do not have any energy storage device. A switch reluctance motor drive integrated with a fast controller and a SISO converter are presented.…”