27.12 MHz large voltage gain resonant converter with low voltage stress

Raymond, Luke; Liang, Wei; Choi, Joo-Hong; Rivas, Juan

doi:10.1109/ecce.2013.6646928

Cited by 30 publications

(13 citation statements)

References 12 publications

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“…Fig. 2 shows two implementations of air core toroids using traces on PCB [2], [3].Similar work can also be found in [10]. As the optimal cross section shape of a toroidal inductor (a)…”

Section: Introductionmentioning

confidence: 83%

“…4, 5 and 6 shows the OpenSCAD CAD model, photo and simulated magnetic flux density plot of a square cross section toroid. The vertical connecting walls are solid compared to the PCB ones in [2], [3]. Moreover, ability to adjust the toroid height allows for designs with a better quality factor.…”

Section: B Software Toolchainmentioning

confidence: 99%

“…2a was designed to maintain a cross section aspect ratio close to the optimum at the expense of of fabrication complexity. Then as the switching frequency doubles in [3], a toroid of smaller value in Fig. 2b was implemented using a single 3.2 mm thickness PCB.…”

Section: (B)mentioning

confidence: 99%

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3D printed air core inductors for high frequency power converters

Liang

Raymond

Rivas

2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper presents the design, modeling and characterization of 3D printed air core inductors for high frequency power electronics circuits. The use of additive manufacturing techniques in passive components design extends the design flexibility and offers ways to overcome some of the fabrication limitations of today's planar processes. Recent work [1]-[4] has demonstrated the feasibility of incorporating air core inductors in high frequency (>10 MHz) switching power converters. These implementations have used discrete wire wound solenoids and toroids, and planar components that use Printed Circuit Board (PCB) traces or photolithographic techniques to make air core inductors. However, realizations of such components have limitations in performance and applicability: wire wound and PCB devices leave open paths conducive to the flow of leakage fields, and photolithography yields devices with geometric constraints and limited cross section aspect ratios. We propose the use of 3D printing and molding techniques to add flexibility and functionality in the design as they allow the manufacturing of components with rounded edges and overhanging structures impossible for planar processes. In this paper, we present several examples of air core inductors designed using 3D printing and molding techniques to give an idea of the geometries that are possible to realize. Moreover, we show that some of these designs can lead to improved electrical performance. The paper also describes the tools used by the authors to design, fabricate and characterize the electromagnetic performance of the air core inductors. As progress in additive manufacturing continues, we envision a fully 3D printed power converter that obviates the need of printed circuits board. Toward this goal, we present a 70 W prototype 27.12 MHz resonant inverter that incorporates some of the 3D printed components developed for this work.

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“…Fig. 2 shows two implementations of air core toroids using traces on PCB [2], [3].Similar work can also be found in [10]. As the optimal cross section shape of a toroidal inductor (a)…”

Section: Introductionmentioning

confidence: 83%

Section: B Software Toolchainmentioning

confidence: 99%

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3D printed air core inductors for high frequency power converters

Liang

Raymond

Rivas

2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

Self Cite

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“…Recently, two-stage converters comprising a high-frequency DC/AC resonant inverter that is cascaded with a high-frequency AC/DC rectifier have been proposed [27], [28] to achieve a high-voltage-gain step-up voltage conversion. The resonant nature of the converter allows soft-switching operation, which mitigates the switching loss of the converter.…”

Section: Introductionmentioning

confidence: 99%

“…However, this topology is limited to applications where the grounds of the input and the output of the converter are isolated. For the converter proposed in [27], the voltage gain is mainly achieved by the inverter stage. The rectifier stage achieves little voltage gain.…”

Section: Introductionmentioning

confidence: 99%

Nonisolated Harmonics-Boosted Resonant DC/DC Converter With High-Step-Up Gain

Huang

Xiong

Tan

et al. 2018

IEEE Trans. Power Electron.

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High-step-up DC/DC converters are widely required in grid-connected applications with renewable energy sources. An extremely high-ratio step-up non-isolated DC/DC converter, in the form of a harmonics-boosted resonant converter, is proposed in this paper. This proposed converter consists of a high-frequency DC/AC inverter stage that is followed by a passive AC/DC rectifier stage connected in cascade. Conventionally, such a DC/AC inverter is designed to output a pure sinusoidal AC voltage with an amplitude several times the amplitude of the input voltage. However, for the proposed converter, the harmonics-boosted inverter stage is designed to contain selected voltage harmonics that significantly boost the amplitude of its output voltage. This greatly increases the overall gain of the converter. The adopted AC/DC stage is a diode-capacitor rectifier, which is of high efficiency and easily extendable to increase the voltage gain. Importantly, the proposed converter involves only one active switch.With only one active switch, the driver's loss is minimized and the converter's control is simplified. Zero-voltage switching (ZVS) is applied to reduce the switching loss, which also allows the converter to operate efficiently at high frequency, and thus can be designed for high power density. The optimal design of the two converter stages and their combined voltage gain is investigated and reported. Besides, a design guideline of the proposed converter is provided. A prototype of a 57-time harmonics-boosted resonant converter with 3.3 V input voltage, 500 kHz switching frequency, and 21 W output power, is built. The experimental result shows that the achieved converter's efficiency is as high as 88.6%.

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Analysis and design of a 30 MHz resonant SEPIC converter

Lin

Yuan

Zhang

et al. 2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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This paper presents the analysis and design of a resonant SEPIC converter operating at 30 MHz. With the conventional design method, tuning the amplitude and phase of the fundamental input voltage and current affect each other so that the design procedure is trial-and-error. An improved design method is proposed by re-dividing the resonant SEPIC topology and defining the new variables to realize the independent tuning of the amplitude and phase. The loss analysis is provided. A 15 V input, 14 W/ 28 V output, 30 MHz prototype has been built to verify the proposed design method. The prototype achieves the efficiency above 80% over a wide load. Furthermore, a novel structure of the PCB embedded inductors is used in a 25 W prototype to further improve the power density. Keywords-VHF SEPIC; design method; PCB inductor978-1-4799-6735-3/15/$31.00 ©2015 IEEE

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27.12 MHz large voltage gain resonant converter with low voltage stress

Cited by 30 publications

References 12 publications

3D printed air core inductors for high frequency power converters

3D printed air core inductors for high frequency power converters

Nonisolated Harmonics-Boosted Resonant DC/DC Converter With High-Step-Up Gain

Analysis and design of a 30 MHz resonant SEPIC converter

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