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A Bulk-Capacitance Reduction Method Using Self-Driven Thyristor for AC-DC Converters
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DOI：10.1109/TPEL.2021.3093051.png)
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Abstract
En 中文
Universal serial bus power delivery fast chargers equipped with wide-bandgap devices are driven to higher power density and efficiency. The indispensable high-voltage bulk capacitors used to smooth the rectifier output could take 40% of the total system volume due to the large capacitance value required. This letter discussed a capacitor reduction method using a self-driven thyristor scheme comprised of only three components in total. No extra control circuit is needed. Circuit analysis and design equations are presented, and the design results are implemented in a 60-W GaN-based active-clamp flyback converter. The measurement results on the prototype show a 36.4% reduction of the bulk-capacitor size with similar efficiency compared to the conventional solution.
Keywords:
Capacitors
Rectifiers
Capacitance
Bridge circuits
Threshold voltage
Discharges (electric)
Prototypes
AC-DC converter
capacitance reduction
high density
USB-PD
Journal
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6.5
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Citations:
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