Details
| Original language | English |
|---|---|
| Article number | 923 |
| Number of pages | 21 |
| Journal | Electronics |
| Volume | 11 |
| Issue number | 6 |
| Publication status | Published - 16 Mar 2022 |
Abstract
For various applications, such as gate drivers for transistors, wireless chargers for mobile devices and cars, and isolated measurement equipment, an isolated DC power supply for electronic components is required. In this work, a new concept for an isolated power supply with insulation strength of 50 kV and power transmission of up to 60 W to supply measurement equipment with 12 or 24 V is presented. Furthermore, high overall efficiency of 82.5% at 55 W is achieved. Feasibility is demonstrated in a real application powering data acquisition electronics at high reference potential. Our new concept uses a coreless printed circuit board (PCB) transformer (15 cm × 10 cm × 4 cm and a weight of 480 g) designed for maximum efficiency via a coil layout and close proximity of adjacent coils on one PCB while reaching high isolation strength via the PCB material and potted coils. To increase efficiency, we investigated different coil geometries at different frequencies. A low-cost design consisting of two Qi charging coils mounted on one PCB is compared with our integrated PCB transformers manufactured from a four-layer PCB with ferrites applied on the outside. With this new design, high isolation voltages are possible while reaching high transformer efficiency of up to 90%.
Keywords
- DC/DC converter, DCDC converter, Gallium nitride GaN transistor, High voltage isolation, PCB coils, PCB transformer, Power transformer
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Computer Science(all)
- Signal Processing
- Computer Science(all)
- Hardware and Architecture
- Computer Science(all)
- Computer Networks and Communications
- Engineering(all)
- Electrical and Electronic Engineering
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In: Electronics, Vol. 11, No. 6, 923, 16.03.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Wireless Low-Power Transfer for Galvanically Isolated High-Voltage Applications
AU - Hitzemann, Moritz
AU - Lippmann, Martin
AU - Trachte, Jonas
AU - Nitschke, Alexander
AU - Burckhardt, Olaf
AU - Zimmermann, Stefan
N1 - Funding Information: Funding: Supported by the German Federal Ministry of Education and Research (BMBF) under the Grant 13N14888. Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—396430937. Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—263334553. Acknowledgments: We thank Christian-Robert Raddatz, Nic Solle and Eduard Sailer for their help during this work. We want to acknowledge Cameron Naylor for his advice during editing.
PY - 2022/3/16
Y1 - 2022/3/16
N2 - For various applications, such as gate drivers for transistors, wireless chargers for mobile devices and cars, and isolated measurement equipment, an isolated DC power supply for electronic components is required. In this work, a new concept for an isolated power supply with insulation strength of 50 kV and power transmission of up to 60 W to supply measurement equipment with 12 or 24 V is presented. Furthermore, high overall efficiency of 82.5% at 55 W is achieved. Feasibility is demonstrated in a real application powering data acquisition electronics at high reference potential. Our new concept uses a coreless printed circuit board (PCB) transformer (15 cm × 10 cm × 4 cm and a weight of 480 g) designed for maximum efficiency via a coil layout and close proximity of adjacent coils on one PCB while reaching high isolation strength via the PCB material and potted coils. To increase efficiency, we investigated different coil geometries at different frequencies. A low-cost design consisting of two Qi charging coils mounted on one PCB is compared with our integrated PCB transformers manufactured from a four-layer PCB with ferrites applied on the outside. With this new design, high isolation voltages are possible while reaching high transformer efficiency of up to 90%.
AB - For various applications, such as gate drivers for transistors, wireless chargers for mobile devices and cars, and isolated measurement equipment, an isolated DC power supply for electronic components is required. In this work, a new concept for an isolated power supply with insulation strength of 50 kV and power transmission of up to 60 W to supply measurement equipment with 12 or 24 V is presented. Furthermore, high overall efficiency of 82.5% at 55 W is achieved. Feasibility is demonstrated in a real application powering data acquisition electronics at high reference potential. Our new concept uses a coreless printed circuit board (PCB) transformer (15 cm × 10 cm × 4 cm and a weight of 480 g) designed for maximum efficiency via a coil layout and close proximity of adjacent coils on one PCB while reaching high isolation strength via the PCB material and potted coils. To increase efficiency, we investigated different coil geometries at different frequencies. A low-cost design consisting of two Qi charging coils mounted on one PCB is compared with our integrated PCB transformers manufactured from a four-layer PCB with ferrites applied on the outside. With this new design, high isolation voltages are possible while reaching high transformer efficiency of up to 90%.
KW - DC/DC converter
KW - DCDC converter
KW - Gallium nitride GaN transistor
KW - High voltage isolation
KW - PCB coils
KW - PCB transformer
KW - Power transformer
UR - http://www.scopus.com/inward/record.url?scp=85126722237&partnerID=8YFLogxK
U2 - 10.3390/electronics11060923
DO - 10.3390/electronics11060923
M3 - Article
AN - SCOPUS:85126722237
VL - 11
JO - Electronics
JF - Electronics
SN - 2079-9292
IS - 6
M1 - 923
ER -