带de类放大器的功率组合器的输出功率控制

Proceedings of the 2005 European Conference on Circuit Theory and Design, 2005. Pub Date : 2005-10-31 DOI:10.1109/ECCTD.2005.1523076

J. Modzelewski, M. Mikolajewski

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引用次数: 1

摘要

晶体管高功率高频变换器的输出功率可以利用其由一组功率组合的放大器组成的特定结构来控制。这种转换器的输出功率可以通过改变组合放大器与控制信号的数量来控制。在可控的功率组合网络中，可以使用工作在零电压开关条件下的de类功率放大器，保证了任何非零输出功率的高效率。本文对带de类放大器的功率组合变换器进行了理论分析，并对五级500kHz/700W实验室模型进行了实验研究。讨论了功率控制方法的优点和局限性。

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Output power control in a power combiner with class-DE amplifiers

Output power of transistorised high-power high-frequency converters can be controlled utilising their specific structure consisting of a set of amplifiers the power of which is combined. The output power of such a converter can be controlled by varying the number of combined amplifiers versus the control signal. In the controlled power-combining network there can be used class-DE power amplifiers operating in zero-voltage-switching conditions, which assures high efficiency for any nonzero output power. The paper presents a theoretical analysis for a power-combining converter with class-DE amplifiers and experimental results obtained for a five-stage 500kHz/700W laboratory model. Advantages and limitations of the power-control method are also discussed.

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Proceedings of the 2005 European Conference on Circuit Theory and Design, 2005.

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