同步降压变换器的无电流传感器变频调制

2022 IEEE International Conference on Power Systems and Electrical Technology (PSET) Pub Date : 2022-10-13 DOI:10.1109/PSET56192.2022.10100523

Jingtao Xu, Lulin Zhang, Yao Sun, Shiming Xie

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引用次数: 0

摘要

介绍了一种用于同步降压变换器的无电流传感器变频调制方法。该控制方法实现了零电压开关(ZVS)，而不需要任何过零检测电路。本文采用数字控制，降低了变换器的复杂性和采样噪声的灵敏度。此外，与现有带电流传感器的数字变频方法相比，该方法通过电流观测器对电感电流进行估计，适用于宽负载范围的应用。省去了昂贵的电流传感器和采样电路，进一步降低了变换器的成本。最后，搭建了4SV输入、24V输出的实验样机。实验结果证明了该方法的有效性和可行性。

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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Current Sensorless Variable Frequency Modulation for Synchronous Buck Converter

This paper introduces a current sensorless variable frequency modulation for synchronous Buck converter. The proposed control method realizes zero voltage switching (ZVS) without any zero-crossing detection (ZCD) circuit. The digital control is used in this paper to reduce the complexity of the converter and the sensitivity of sampling noise. In addition, compared with the existing digital variable frequency method with current sensor, the proposed method estimates the inductor current through current observer which can be used in wide load range applications. The expensive current sensors and sampling circuits can be saved, further reducing the cost of the converter. Finally, an experimental prototype with 4SV input and 24V output is built. The experimental results prove the effectiveness and feasibility of the proposed method.

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来源期刊

2022 IEEE International Conference on Power Systems and Electrical Technology (PSET)

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