A Simple Structure of Zero-Voltage Switching (ZVS) and Zero-Current Switching (ZCS) Buck Converter with Coupled Inductor

Wei, Xiantao; Luo, Ciyong; Nan, Hang; Wang, Yinghao

doi:10.6113/jpe.2015.15.6.1480

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…They can be categorized into zero voltage switching (ZCS) and zero current switching (ZVS) converters. The designs capitalize on the principle that switching losses can be considerably reduced when transitions occur at either zero current (in ZVS) or zero voltage (in ZCS) 32,33) .…”

Section: Introductionmentioning

confidence: 99%

High-Gain Cuk DC-DC Converter with Switch-Capacitor and Switched Inductor: A Non-Isolated Design

A. Clement Raj,

R. Bens Raj

2023

Evergreen

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This work introduces the DC-DC topology of a non-isolated high-gain step-up Cuk converter. The proposed topology is based on implementing switched-capacitor (SC) and switchedinductor (SL) techniques. The primary focus of this topology is the application in renewable energy systems and electric vehicles, specifically in photovoltaic and fuel cell technologies. The proposed topology exhibits a notable enhancement in voltage boost capability when compared to the traditional boost and Cuk converters, owing to the implementation of SC and SL approaches. The suggested Cuk converters are obtained by modifying the original Cuk converter, wherein the single inductor present at the output and input sides is substituted with an SL, and the energy-transferring capacitor is replaced with an SC. The primary benefits of the recommended Cuk converters lie in their ability to achieve a high output voltage gain and mitigate the voltage stress experienced by the power switch. Hence, it is possible to utilize a MOSFET with a lower voltage capacity, resulting in a lesser Rds-ON and increasing efficiency. A comparison has been made between the voltage gain and voltage stress across the primary switch in the proposed converter and the Cuk and boost converter. The recommended topology is intended to circumvent the need for a transformer, coupled inductors, or severe duty cycles. This design approach results in reduced volume, loss, and cost. The proposed converter is evaluated under the continuous conduction mode. The present study provides a theoretical investigation of the continuous conduction mode, whereby all relevant expressions are derived and compared with the corresponding simulation results.

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Section: Introductionmentioning

confidence: 99%

High-Gain Cuk DC-DC Converter with Switch-Capacitor and Switched Inductor: A Non-Isolated Design

A. Clement Raj,

R. Bens Raj

2023

Evergreen

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“…A separation network can be used to separate common mode electromagnetic interference and differential mode electromagnetic interference and the detailed method is introduced in [8]. Clamp method [9][10] [12]，EMI filtering technology [4] [11], buffer technology [2][13] ， balance technology [14]，Soft switching technology [15] [16] [22]and active voltage control method [18] [19] [20]have been studied by scientists.…”

Section: Introductionmentioning

confidence: 99%

“…Soft-switching converters with coupled inductors are used in [22]. However, under certain conditions, merely reducing the electromagnetic interference through soft switching may not meet the EMI standards.…”

Section: Introductionmentioning

confidence: 99%

Closed-Loop Gate Drive for Single-Ended Forward Converter to Reduce Conducted EMI

et al. 2020

IEEE Access

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Forward DC / DC converters are widely used in low and medium power circuits that are widely used in the aerospace and navigation fields. Power converters are usually sources of electromagnetic interference (EMI), which is due to their higher voltage and current transients. The traditional method is to add expensive filters on the primary side or the secondary side, but its disadvantages are high cost and poor adjustability. Based on the principle that the greater the number of derivations of voltage transients, the lower the high frequency electromagnetic interference contained in this voltage, a signal containing small high-frequency noise that is suitable for the hardware circuit as a reference signal is selected, and a closedloop gate drive method is used in this paper, which attenuate the conducted EMI noise in the input bus of the forward DC/DC converter. The reference signal shapes the output signal to achieve the purpose of suppressing electromagnetic interference through the closed loop circuit. The advantages of this method are making the output highly adjustable, reducing hardware size and weight and lower cost compared with filter method. Compared with the method of controlling current to reduce electromagnetic interference, the proposed method is easier to implement. Firstly, the relationship between the derivative order of voltage transient and electromagnetic interference is introduced. Secondly, the experimental principle of singleended forward circuit controlled by closed loop is introduced. Simulation and experimental results show that the proposed method can achieve voltage shaping and suppression of voltage overshoot effectively. Compared with the traditional hard-switching control method, the proposed method can make the highfrequency components of the drain-source voltage of the primary-side MOS transistor and the secondaryside output voltage have a greater attenuation.

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“…Since the operation under hard switching condition causes some bad effects on the efficiency of the converter and electromagnetic compatibility (EMC), which is due to high di/dt and dv/dt, soft switching techniques are employed to decrease switching losses and electromagnetic interference (EMI).Both zerovoltage-switching (ZVS) and zero-current-switching (ZCS) are soft switching methods that can be used in the buck topology [9]. In [10][11], soft switching stepdown converters with coupled inductor are presented.…”

Section: Introductionmentioning

confidence: 99%

EMI Reduction of a Soft-switched High Step-down Converter Using Passive Compensation Method

Yazdani

Ariyan

2018

2018 International Conference on Applied Electronics (AE)

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In this paper, an EMI reduction method is applied to a new high step-down converter which has a coupled inductor, a synchronous rectifier and method with an auxiliary soft-switching cell. The freewheeling diode is replaced with a synchronous rectifier (SR) and zero-voltage-transition (ZVT) condition is provided for the main and SR switches. The auxiliary switch acts under zero-current switching. To reduce conducted electromagnetic emissions, a passive method is utilized by adding another winding on the core of converter coupled inductor to compensate the common-mode noise current generated by the parasitic capacitor of the main switch. The operating modes and theoretical waveforms are presented and simulation results of a 100W -100 kHz converter are shown to verify the theoretical analysis. The conducted EMI predictions confirm the benefit of the passive compensation method.

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A Simple Structure of Zero-Voltage Switching (ZVS) and Zero-Current Switching (ZCS) Buck Converter with Coupled Inductor

Cited by 7 publications

References 20 publications

High-Gain Cuk DC-DC Converter with Switch-Capacitor and Switched Inductor: A Non-Isolated Design

High-Gain Cuk DC-DC Converter with Switch-Capacitor and Switched Inductor: A Non-Isolated Design

Closed-Loop Gate Drive for Single-Ended Forward Converter to Reduce Conducted EMI

EMI Reduction of a Soft-switched High Step-down Converter Using Passive Compensation Method

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