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首页> 外文会议>Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition >Small-signal analysis of the asymmetrical half-bridge converter with two transformers
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Small-signal analysis of the asymmetrical half-bridge converter with two transformers

机译：具有两个变压器的非对称半桥转换器的小信号分析

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摘要

Achieving soft switching in primary switches and reducing switching losses in the secondary ones make of the Asymmetrical Half Bridge (AHB) a suitable topology for many high-performance applications. Besides, the lack of dead times, except those needed for achieving soft switching, is a very interesting feature for self-driven synchronous rectification. On the other hand, it also has some disadvantages. One of them is the short range of the duty cycle (lower than 0.5) and the other is the difficult regulation due to a complex transfer function. The AHB with Two Transformers (AHBTT) solves the first problem. Nevertheless, the regulation of this converter is still very complex and, besides, the transfer functions of the standard AHB are not valid for the AHBTT. In this paper, the complete small-signal analysis of the AHBTT operating in Continuous Conduction Mode is provided. The validation of the resulting model is carried out by means of experimental results. The prototype is a 60-W AHBTT designed for an input voltage of 400 V and an output voltage of 48 V.
机译：非对称半桥（AHB）实现了初级开关中的软开关并减少了次级开关中的开关损耗，因此它成为许多高性能应用的合适拓扑。此外，除了实现软开关所需的停滞时间以外，无停滞时间的不足对于自驱动同步整流而言是非常有趣的功能。另一方面，它也有一些缺点。其中之一是占空比的短范围（小于0.5），另一个是由于传递函数复杂而难以调节。带两个变压器的AHB（AHBTT）解决了第一个问题。然而，该转换器的调节仍然非常复杂，此外，标准AHB的传递函数对于AHBTT无效。本文提供了在连续传导模式下运行的AHBTT的完整小信号分析。所得模型的验证是通过实验结果进行的。该原型是60W AHBTT，设计用于400 V的输入电压和48 V的输出电压。

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