Novel high-efficiency step-up converter

Tseng, Kuo‐Ching; Liang, Tsorng–Juu

doi:10.1049/ip-epa:20040022

Cited by 403 publications

(182 citation statements)

References 8 publications

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“…10(a) shows the gate-source voltage of the main switch Q S , the input voltage V in and the output voltage V o . The measured duty cycle is about 0.68 as predicted by (15), and high step-up capacity is verified. The current of the leakage inductance i Lk and the voltage of the magnetizing inductance v Lm are shown in Fig.…”

Section: Experimental Results and Analysissupporting

confidence: 54%

“…In order to solve the aforementioned problems, a resistor-capacitor-diode (RCD) snubber can be employed, but the leakage energy is dissipated [14]. Passive lossless clamp circuits composed of diodes and capacitors are adopted to clamp the turn-off voltage spikes on the switch and to recycle the leakage inductance energy [15]- [18]. Thus, low-voltage rated switches can be employed to improve the efficiency.…”

Section: Introductionmentioning

confidence: 99%

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An Active Clamp High Step-Up Boost Converter with a Coupled Inductor

Luo¹,

Zhang²,

Sun³

et al. 2015

Journal of Power Electronics

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An active clamp high step-up boost converter with a coupled inductor is proposed in this paper. In the proposed strategy, a coupled inductor is adopted to achieve a high voltage gain. The clamp circuit is included to achieve the zero-voltage-switching (ZVS) condition for both the main and clamp switches. A rectifier composed of a capacitor and a diode is added to reduce the voltage stress of the output rectifier diode. As a result, diodes with a low reverse-recovery time and forward voltage-drop can be utilized. Since the voltage stresses of the main and clamp switches are far below the output voltage, low-voltage-rated MOSFETs can be adopted to reduce conduction losses. Moreover, the reverse-recovery losses of the diodes are reduced due to the inherent leakage inductance of the coupled inductor. Therefore, high efficiency can be expected. Firstly, the derivation of the proposed converter is given and the operation analysis is described. Then, a steady-state performance analysis of the proposed converter is analyzed in detail. Finally, a 250 W prototype is built to verify the analysis. The measured maximum efficiency of the prototype is 95%.

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Section: Experimental Results and Analysissupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

An Active Clamp High Step-Up Boost Converter with a Coupled Inductor

Luo¹,

Zhang²,

Sun³

et al. 2015

Journal of Power Electronics

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show abstract

“…Finally, a comparison is made between the proposed converter and the Integrated Boost Flyback Converter (IBFC) [5,15] with regard to the stress of a power switch and converter efficiency. The IBFC prototype used in this study has the same circuit specifications and coupled inductor parameters as the proposed converter.…”

Section: Step-up Gain Of 10mentioning

confidence: 99%

“…However, in practice, due to component non-idealities, such as the inductor resistance, the diode forward voltage drop, the switch on-state resistance etc., losses and voltage drops in the circuit increase with the increasing duty cycle. As a result, the efficiency and voltage gain of the boost converter are degraded, when the duty cycle is large [4,5]. Besides, operating the boost converter at the extreme duty cycle means its rectifier diode has less time to conduct.…”

Section: Introductionmentioning

confidence: 99%

A Novel Clamp-Mode Coupled-Inductor Boost Converter with High Step-Up Voltage Gain

Tattiwong¹,

Bunlaksananusorn²

2017

Journal of Electrical Engineering and Technology

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-In this paper, a new coupled inductor DC-DC converter with a high step-up voltage gain is proposed. It is developed from a clamp-mode coupled-inductor boost converter by incorporating an additional capacitor and diode. The proposed converter is able to achieve the higher voltage gain, while still retaining the switch voltage clamp property of its predecessor. In the paper, operation and analysis of the proposed converter are described. Experimental results from a prototype converter are presented to verify the validity of the analysis. The prototype circuit attains the highest efficiency of 92.8%.

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“…Another drawback of the converter was the high input current ripple that existed because no current path was present when the metal-oxide-semiconductor field-effect transistor (MOSFET) was off. Further improvements of the step-up converter were accomplished by combining a boost converter with a flyback converter [17], [18]. Compared with the converter in [16], the boost ratio was improved as a result of the outputs of the boost converter and flyback converter in series.…”

Section: Introductionmentioning

confidence: 99%

Single-Ended High-Efficiency Step-up Converter Using the Isolated Switched-Capacitor Cell

Kim¹,

Jang²,

Park³

et al. 2013

Journal of Power Electronics

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The depletion of natural resources and renewable energy sources, such as photovoltaic (PV) energy, has been highlighted for global energy solution. The PV power control unit in the PV power-generation technology requires a high step-up DC-DC converter. The conventional step-up DC-DC converter has low efficiency and limited step-up ratio. To overcome these problems, a novel high step-up DC-DC converter using an isolated switched capacitor cell is proposed. The step-up converter uses the proposed transformer and employs the switched-capacitor cell to enable integration with the boost inductor. The output of the boost converter and isolated switched-capacitor cell are connected in series to obtain high step-up with low turn-on ratio. A hardware prototype with 30 V to 40 V input voltage and 340 V output voltage is implemented to verify the performance of the proposed converter. As an extended version, another novel high step-up isolated switched-capacitor single-ended DC-DC converter integrated with a tapped-inductor (TI) boost converter is proposed. The TI boost converter and isolated-switchedcapacitor outputs are connected in series to achieve high step-up. All magnetic components are integrated in a single magnetic core to lower costs. A prototype hardware with 20 V to 40 V input voltage, 340 V output voltage, and 100 W output power is implemented to verify the performance of the proposed converter.

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Novel high-efficiency step-up converter

Cited by 403 publications

References 8 publications

An Active Clamp High Step-Up Boost Converter with a Coupled Inductor

An Active Clamp High Step-Up Boost Converter with a Coupled Inductor

A Novel Clamp-Mode Coupled-Inductor Boost Converter with High Step-Up Voltage Gain

Single-Ended High-Efficiency Step-up Converter Using the Isolated Switched-Capacitor Cell

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