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Coreless printed circuit board (PCB) transformers for power MOSFET/IGBT gate drive circuits

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3 Author(s)
Hui, S.Y.R. ; Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong ; Chung, H.S.-H. ; Tang, S.C.

Gate drive circuits for modern power electronic switches, such as MOSFET and insulated gate bipolar transistor (IGBT), often require electrical isolation. This paper describes the modeling and experimental results of some coreless printed circuit board (PCB)-based transformers that can be used for MOSFET and IGBT devices at high-frequency (500 kHz to 2 MHz) operation. PCB-based transformers do not require the manual winding procedure and thus simplify the manufacturing process of transformer-isolated gate drive circuits. With no core loss, coreless transformers are found to have favorable characteristics at high-frequency operations. This project demonstrates an important point that the size of the magnetic core can approach zero and become zero when the frequency is sufficiently high

Published in:

Power Electronics, IEEE Transactions on  (Volume:14 ,  Issue: 3 )