Multilayer Flexible Printed Circuitry Planar Transformer With Integrated Series Capacitance for an <i>LLC</i> Converter

Ho, Godwin Kwun Yuan; Pong, M.H.

doi:10.1109/tpel.2019.2896909

Cited by 14 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar to general Litz wire tr formers, planar transformers first select the core size using the WaAc product of (1), w represents the transformer capacity. Therefore, previous planar transformer studies have focused on the minimization of the parasitic capacitance via the PCB pattern arrangement [10,[18][19][20][21][22][23] and the control and utilization of the parasitic capacitance [24][25][26]. Various core shapes and matrix configurations with fractional turns for current distribution have also been researched [22][23][24][25][26][27][28][29][30].…”

Section: Initial Design Of Planar Transformermentioning

confidence: 99%

“…Therefore, previous planar transformer studies have focused on the minimization of the parasitic capacitance via the PCB pattern arrangement [10,[18][19][20][21][22][23] and the control and utilization of the parasitic capacitance [24][25][26]. Various core shapes and matrix configurations with fractional turns for current distribution have also been researched [22][23][24][25][26][27][28][29][30]. In addition, recent studies applying planar transformers to achieve a high OBC power density have not addressed the optimal design of planar transformers [5,31,32].…”

Section: Initial Design Of Planar Transformermentioning

confidence: 99%

“…Among the various DC-DC converter topologies, LLC resonant converters have recently been widely utilized as strong candidates for high power density OBCs owing to the absence of an output filter [11][12][13][14][15][16][17]. In order to maximize the advantages of LLC converters, special attention should be paid to reducing the size of high-frequency transformers, and this leads to the design and development of planar-type transformers [16][17][18][19][20][21][22]. A planar transformer can achieve a low-profile design because the windings can be implemented inside a printed circuit board (PCB).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of Planar Transformers for LLC Converters in High Power Density On-Board Chargers for Electric Vehicles

Son,

Lee

2023

Energies

View full text Add to dashboard Cite

This article presents a planar transformer design and optimization method for high power density on-board chargers (OBCs) utilized in electric vehicles (EVs). Owing to considerations of electrical safety, OBCs require an isolated converter, leading to a substantial increase in volume due to the inclusion of a transformer. To address this issue and achieve high power density, a planar transformer is used, and an optimized design method is proposed for pattern arrangement, width, and core shape. The feasibility of the design is verified through the development of a 3.3 kW OBC prototype. Consequently, when compared to conventional transformers, the design method in this article results in a 27% reduction in the transformer’s height and a 20% reduction in its overall volume. This reduction is advantageous for meeting the requirements of high power density OBCs.

show abstract

Section: Initial Design Of Planar Transformermentioning

confidence: 99%

Section: Initial Design Of Planar Transformermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of Planar Transformers for LLC Converters in High Power Density On-Board Chargers for Electric Vehicles

Son,

Lee

2023

Energies

View full text Add to dashboard Cite

show abstract

“…Efficient methods to design and optimize air-core planar transformers for highfrequency LLC converters are proposed to optimize the transfer efficiency [18]. Conclusions can be drawn from the similar paper [19]- [21]. In addition, a common problem in bidirectional resonant topology is that the controller often uses frequency modulation to regulate the output voltage.…”

Section: Introductionmentioning

confidence: 99%

CLLCLC Topology Based on Adaptive Excitation Inductance for the Improvement of Bidirectional DC–DC Converter Efficiency

Guo,

Chen,

Chen

et al. 2023

IEEE Access

View full text Add to dashboard Cite

Due to the great uncertainty of the output power of renewable energy sources (RESs), the storage and reuse of RESs is the focus of new energy technology. The bidirectional DC-DC resonant converter is preferred in the new energy technology. However, the efficiency of traditional bidirectional DC-DC resonant converter will be greatly affected by the wide voltage gain range. By applying the adaptive excitation inductance, a CLLCLC resonant converter is proposed. The L-C branch is introduced to replace the fixed excitation inductance in traditional CLLLC resonant converter. In the design of transformer, the turns ratio and excitation inductance of transformer are decoupled to reduce the difficulty of transformer design. Simultaneously, compared with the traditional transformer, the impedance of equivalent excitation inductance will adjust automatically against the working frequency, decreasing the circulating current loss of resonant tank. Therefore, the proposed converter solves the contradiction between wide voltage gain range and high efficiency existed in the traditional converter. Finally, an experimental platform with 200 W rated power is built to verify the effectiveness of proposed topology.INDEX TERMS bidirectional DC-DC resonant converter, Renewable energy sources (RESs), zero voltage switching (ZVS).

show abstract

Analysis of a Non-overlapping Interleaved Planar Transformer Winding Structure with Reduced Parasitic Effects

Venugopal

Robert

2022

Iran J Sci Technol Trans Electr Eng

View full text Add to dashboard Cite

Multilayer Flexible Printed Circuitry Planar Transformer With Integrated Series Capacitance for an LLC Converter

Cited by 14 publications

References 30 publications

Design of Planar Transformers for LLC Converters in High Power Density On-Board Chargers for Electric Vehicles

Design of Planar Transformers for LLC Converters in High Power Density On-Board Chargers for Electric Vehicles

CLLCLC Topology Based on Adaptive Excitation Inductance for the Improvement of Bidirectional DC–DC Converter Efficiency

Analysis of a Non-overlapping Interleaved Planar Transformer Winding Structure with Reduced Parasitic Effects

Contact Info

Product

Resources

About