双调制采用半桥与互补控制

APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285) Pub Date : 1999-03-14 DOI:10.1109/APEC.1999.750489

G. Carli

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引用次数: 6

摘要

在非对称半桥PWM变换器中，采用双调制控制方案产生两个严格控制的输出电压。主输出通过占空比调制控制，第二输出通过频率调制控制。这样的组合提供了一种具有成本效益的电路，在工作频率(即磁性元件的尺寸)和效率之间取得了最佳平衡。本文介绍了该变换器的电路工作原理，并对其小信号特性进行了分析。由于功率级的频率依赖性质和一些实际的设计考虑还讨论了设计约束。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Dual modulation using the half bridge with complementary control

A dual modulation control scheme is employed to generate two tightly controlled output voltages in an asymmetrical half-bridge PWM converter. The main output is controlled via duty ratio modulation while the second output via frequency modulation. Such a combination provides a cost-effective circuit with an optimal balance between operating frequency (thus size of magnetic components) and efficiency. In this paper, the circuit operation of the converter is described and its small signal behavior analyzed. Design constraints due to frequency-dependent nature of the power stage and some practical design considerations are also discussed.

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APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)

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