2.65 MHz高效软开关功率放大器系统

30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321) Pub Date : 1999-06-27 DOI:10.1109/PESC.1999.789030

J. Qian, G. Bruning

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引用次数: 9

摘要

功率转换器工作在兆赫频率可能提供高功率密度和小型化。不仅在功率级，而且在栅极驱动器中，高开关损耗阻碍了它们的开发。分析了方波和正弦波两种栅极驱动器，提出并实现了一种具有栅极电容能量回收的新型高效软开关栅极驱动器。给出了实现零电压开关(ZVS)工作的条件和2.65 MHz功率变换器的设计考虑。结果表明，该2.65 MHz, 100 W功率变换器的总效率为92.6%。

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2.65 MHz high efficiency soft-switching power amplifier system

Power converters operating at megahertz frequency potentially offer high power density and miniaturization. Their exploitation has been hindered by high switching losses not only in the power stage but also in the gate driver. Gate drivers with square-wave and sinusoidal-wave shapes are analyzed and a new high efficiency soft-switching gate driver with gate capacitive energy recovery is proposed and implemented. The conditions to achieve zero-voltage-switching (ZVS) operation and design considerations for a 2.65 MHz power converter are also presented. It is shown that the 2.65 MHz, 100 W power converter has 92.6% overall efficiency.

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30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)

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