DocumentCode :
1503002
Title :
Optimal operation of coreless PCB transformer-isolated gate drive circuits with wide switching frequency range
Author :
Hui, S.Y. ; Tang, S.C. ; Chung, Henry Shu-Hung
Author_Institution :
Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong
Volume :
14
Issue :
3
fYear :
1999
fDate :
5/1/1999 12:00:00 AM
Firstpage :
506
Lastpage :
514
Abstract :
Gate drive circuits for power MOSFETs and insulated gate bipolar transistors (IGBTs) often require electrical isolation. Coreless printed circuit board (PCB) transformers have been shown to have desirable characteristics from a few hundreds of hertz to a few megahertz and can be used for both power and signal transfer at low-power level. At low operating frequency, the magnetizing inductance has such low impedance that the driving power requirement could become excessive. This paper describes the use of a coreless PCB transformer for isolated gate drive circuits over a wide-frequency range. Based on a resonance concept, the optimal operating condition that minimizes the power consumption of the gate drive circuits is developed and verified with experiments. The coreless PCB transformer demonstrated here confirms a fundamental concept that the size and volume of a magnetic core could approach zero and become zero if the operating frequency is sufficiently high. Coreless PCB transformers do not require the manual winding procedure and thus simplify the manufacturing process of transformer-isolated gate drive circuits and low-power converters. Their sizes can be much smaller than those of typical core-based pulse transformers. The electrical isolation of a PCB is much higher than that of an optocoupler
Keywords :
circuit optimisation; driver circuits; equivalent circuits; insulated gate bipolar transistors; power MOSFET; power bipolar transistors; power semiconductor switches; printed circuit accessories; switching circuits; transformers; coreless PCB transformer isolation; electrical isolation; isolated gate drive circuits; magnetizing inductance; operating frequency; optimal operating condition; optimal operation; optocoupler; power IGBTs; power MOSFETs; power converters; wide switching frequency range; Frequency; Inductance; Insulated gate bipolar transistors; MOSFETs; Magnetic cores; Magnetic resonance; Power transformer insulation; Printed circuits; Pulse transformers; Transformer cores;
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/63.761694
Filename :
761694
Link To Document :
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