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Design and Experimental Verification of an Integrated Boost-Flyback Converter with Voltage Multiplier
(2024-01-01)
Tattiwong, Kaweewat
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Sopin, Anan
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Poungnoiy, Saisunee
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Kalnaowakul, Phuri
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Singhata, Napassadol
This paper introduces the design and experimental validation of an integrated boost-flyback converter with a voltage multiplier (IBFCVM). It describes the operation of the IBFCVM and provides its essential voltage and current equations. A phototyped circuit design for a 72W, 12V-to-120V IBFCVM is presented. Experimental results demonstrate that the proposed IBFCVM exhibits effective output voltage regulation, achieving an impressive efficiency of 89.9%.
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Simplified Analysis and Validation of a Two-switch Flyback Converter
(2024-01-01)
Wuti, Virot
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Bunlaksananusorn, Chanin
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Trakuldit, Siripan
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Tattiwong, Kaweewat
;
Luangpol, Amata
This paper presents a simplified analysis and validation of a two-switch flyback converter. When parasitic components, i.e. the MOSFET's output capacitance and transformer's leakage inductance, are neglected, circuit analysis of the two-switch flyback converter is greatly simplified and derivation of the converter equations becomes straightforward. The validity of the derived equations, which are useful for the converter design, is confirmed by simulation and experimental results.
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Analysis and Design of a Tapped Inductor Boost Converter
(2023-01-01)
Tattiwong, Kaweewat
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Trakuldit, Siripan
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Bunlaksananusorn, Chanin
This paper presents an analysis and design of a Tapped Inductor Boost Converter (TBC). The converter operation is analyzed, resulting in key voltage and current expressions for the circuit. Based on the derived equations, a prototype converter is designed and subsequently used for experiment. It is found that the experimental results are consistent with the analytical values.
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Analysis and Experimental Verification of a Tapped Inductor Buck Converter
(2023-01-01)
Trakuldit, Siripan
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Tattiwong, Kaweewat
;
Bunlaksananusorn, Chanin
Modern electronic and information technology equipment require a low DC voltage for operation. Therefore, a power supply used in these devices must be capable of a wide voltage conversion. This paper presents an analysis and experimental verification of a Tapped Inductor Buck Converter (TIBC), which employs a coupled inductor to realize a steep voltage step-down gain. A prototype TIBC is built and tested. The measurement confirms that experimental results are consistent with the analytical ones.
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Design and evaluation of a Quadratic Buck Converter
(2022-04-01)
Trakuldit, Siripan
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Tattiwong, Kaweewat
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Bunlaksananusorn, Chanin
This paper presents design and evaluation of a Quadratic Buck Converter (QBC). A step-by-step procedure to select the converter's component values and semiconductor device ratings is demonstrated. A prototype QBC with a simple closed loop output voltage control is constructed and experimentally evaluated. It is shown that the converter performs well within the design specification, has good output voltage regulation and fast transient response, and achieves the highest efficiency of 82%.
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A Simplified Analysis and Design of an RCD Clamp Forward Converter
(2022-01-01)
Wuti, Virot
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Trakuldit, Siripan
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Luangpol, Amata
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Tattiwong, Kaweewat
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Taylim, Alisala
A conventional forward converter requires a transformer having an extra winding to assist in magnetic core reset, thus complicating the design and increasing the production cost. These shortcomings can be overcome by using an RCD clamp forward converter. This article presents a simplified analysis and design of the RCD clamp forward converter. The laboratory prototype is constructed. Experimental results demonstrates that the prototype converter is capable of providing a constant output voltage throughout its operating condition and has the maximum efficiency of 85%.
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Analysis and design of a zero-voltage-switched (ZVS) quasi-resonant buck converter operating in full-wave mode
(2020-07-01)
Wuti, Virot
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Luangpol, Amata
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Tattiwong, Kaweewat
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Trakuldit, Siripan
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Taylim, Alisala
Hard-switching is typically used in most DC-DC converters, where transition of a power switch occurs when it still carries current and is subject to voltage at the same time. The hard-switching operation incurs high stress and switching losses to the device. These problems can be alleviated by zero voltage switching in which a power switch is made to turn on and off at zero voltage. This paper presents analysis and design of a Zero-Voltage-Switched (ZVS) quasi-resonant buck converter operating in full-wave mode. The prototype converter is designed and built. Test results show that the designed converter achieves zero voltage switching and possesses good output regulation throughout its operating range.
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Performance comparison between a two-switch and RCD clamp forward converters
(2019-07-01)
Wuti, Virot
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Luangpol, Amata
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Tattiwong, Kaweewat
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Sopin, Anan
;
Sirisuk, Phaophak
This paper presents performance comparison between a two-switch and RCD clamp forward converters. The performance comparison is carried out through experimentation on the two prototype circuits, which have the same circuit specifications and similar component values. Aspects to be compared include voltage stress of switching components, output voltage regulation, transient response due to a step-load, and efficiency. Test results show that, while the two converters exhibit equal performance on output voltage regulation, the two-switch forward converter has a lower voltage stress on power switching devices, faster transient response, and higher efficiency than the RCD clamp forward converter.
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A novel clamp-mode coupled-inductor boost converter with high step-up voltage gain
(2017-03-01)
Tattiwong, Kaweewat
;
Bunlaksananusorn, Chanin
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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