All-digital controlled boost DC–DC converter with all-digital DLL-based calibration

Int Trans Electr Energ Syst

Yao

2019

Summary A series of novel high boost DC‐DC conversion circuits was designed and compared in their performances (input and output common ground, input current pulsation, voltage gain, etc). One of the designed conversion circuits is called the high step‐up inductor‐capacitor (HS‐LC) conversion circuit, which has been analyzed as an example. The HS‐LC conversion circuit is composed of one switch, two inductors, two capacitors, and six diodes. The relationship between the input and the output voltage of the HS‐LC conversion circuit in continuous‐conduction mode (CCM) is derived, and the parameter design criteria for the inductors and capacitors are listed. Theoretical comparison analysis of HS‐LC conversion circuit shows that it has the advantages of higher conversion gain, lower switching stress, and lower inductor current ripple. Finally, a practical circuit was built to verify the theoretical analysis.

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Non‐isolated high step‐up DC‐DC conversion circuits for photovoltaic system

Int Trans Electr Energ Syst

Yao

2019

“…There are 2 types of DC‐DC converter: the isolated converter and the nonisolated converter . The isolated converter is more convenient for realizing the step‐up function . However, the isolated converter can result in significant economic waste and reduced working efficiency so that it is less favored unless the circuit needs to be isolated .…”

Section: Introductionmentioning

confidence: 99%

“…Such converters also tend to be larger than nonisolated converters. The general category of nonisolated step‐up converters includes Boost, Buck‐Boost, Ćuk, Zeta, Sepic, switched inductor (SL), switched capacitor (SC), asymmetrical hybrid‐switched inductor converter (AH‐SLC), and symmetrical hybrid‐switched inductor converter (SH‐SLC) converters. The Boost, Buck‐Boost, Ćuk, Zeta, and Sepic converters can step up the voltage, but when the duty ratio is relatively small, it is difficult to achieve high‐voltage gain .…”

Section: Introductionmentioning

confidence: 99%

High-gain Boost DC-DC converters: A-LDC converter and S-LDC converter

Int. Trans. Electr. Energ. Syst.

Zhang

Luo

et al. 2017

Summary A novel switching structure composed of 3 inductors and 6 diodes, which can realize the step‐up function is proposed. The switching structure was added into 2 basic Boost converters, and 2 new types of direct current–direct current converters were obtained: an asymmetric inductor‐diode‐capacitor converter and a symmetric inductor‐diode‐capacitor converter. The step‐up function of the 2 converters depends mainly on charging and discharging of the inductors and capacitors. Theoretical analysis showed that the asymmetric inductor‐diode‐capacitor (A‐LDC) and symmetric inductor‐diode‐capacitor (S‐LDC) converters are characterized by high‐voltage gain, low‐switching stress, and low‐inductance ripple. The theoretical analysis was verified by simulation and experimoental verification.

Novel Modified High Step-Up DC/DC Converters with Reduced Switch Voltage Stress

International Transactions on Electrical Energy Systems

2022

This paper presents the improved switched inductor unit and new step-up DC/DC converters with reduced switch voltage stress and high voltage gain. The proposed switching-inductor unit is composed of 1 switch, 2 diodes, and 2 inductors, which can realize the step-up function. Through comparison, the better topology is selected from the proposed converters, which is named the double-switch high step-up (DS-HS) converter. The CCM operating principles and voltage gain of the DS-HS converter are analyzed. Then, the influences of nonideal components, efficiency analysis, small signal modeling and control, and design criteria of components are discussed. The comparison of the converters is given, and the loss of the DS-HS converter is lower through theoretical derivation, which shows that the DS-HS converter has the advantages of high voltage gain, low voltage stress, and high efficiency. Finally, in order to verify the effectiveness of the DS-HS converter, simulation and experimental results are given, and the efficiency of the DS-HS converter can reach 96.15%.