行波管放大器高壓電源供應器設計與分析

本論文提出行波管放大器〔1〕高壓電源供應器設計與分析。高壓高功率電力轉換器在設計上，因高壓儲能電感器不易製作，故必須將其放置於低壓側，限制可使用的電路拓樸結構。主要的電路可分為單級及雙級兩種，單級電路有隔離型昇壓、推挽式及變頻式諧振轉換器三種，前兩者需要額外的啟動及關閉電路設計複雜，而變頻式諧振轉換器的切換頻率易於干擾行波管微波調變頻率，故均不適用。雙級電路主要有降壓電壓饋入型及降壓電流饋入型全橋式轉換器，前者全橋部分的有效工作週期比後者低，且容易有變壓器磁通不平衡現象，因此本文採用電流饋入型全橋式電路以實現行波管放大器。透過動作原理及電腦模擬以驗證理論之分析，另將以實驗室100kHZ、10kV、1kW原型電路，驗證所提方法的可行。

關鍵字

行波管放大器；行波管；高壓電源供應器；降壓電流饋入型

並列摘要

This paper describes the design and analysis of buck current-fed full bridge converter applied to Traveling Wave Tube Amplifier (TWTA). The inductor of energy storage component on high voltage side of transformer is not obtainable for high voltage high power application, thus limiting available circuit topology. However, the current source type converter can satisfy this application. The single stage version of the current source type converter includes isolated boost type, push-pull type and resonant mode of variable frequency. The first two demanding additional start-up circuit and the third one easily interfacing the modulating operation of radio frequency of TWT owing to its nature of variable switching frequency, they all can not adequately apply to TWTA. The two stages version mainly consists of buck voltage-fed and buck current-fed full bridge converters. The effective duty ratio of full bridge of the front is lower than those of the latter and the front is prone to experience to the flux imbalance problem of transformer. For these reasons, buck current-fed full bridge converter is a better choice to realize TWTA. In this paper, operation principle and computer simulation of buck current-fed full bridge converter will be presented to verify theorem analyses. Experimental results of laboratory prototype, 100kHz、10kV and 1kW output, can proof the feasibility of circuit topology.

並列關鍵字

TWTA ； TWT ； high voltage power supply ； buck current-fed

國際替代計量

行波管放大器高壓電源供應器設計與分析

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