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1. 华南理工大学电力学院,广东,广州,510640
2. 艾默生网络能源有限公司,广东,深圳,518057
3. 华南理工大学电力学院广东广州,510640
4. 艾默生网络能源有限公司广东深圳,518057
Published:2007
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ZHANG Bo, QIU Dong-yuan, HUANG Zhi-gang, et al. Current-Driven Synchronous Rectifier Based on GMR Current Sensing Technology[J]. Acta Electronica Sinica, 2007, 35(8): 1462-1466.
本文将一种基于巨磁致电阻(Giant Magneto ResistiveGMR)的电流检测技术应用于同步整流技术中.该技术可以克服传统电流驱动同步整流器中电流检测器件损耗较大、不能测直流、漏感大、不能工作于高频等缺点.本文内容包括GMR电流检测技术原理和性能分析
GMR电流检测电流驱动同步整流正激变换器的实验研究.研究结果表明
该变换器工作性能理想
在轻载情况下效率有较大幅度的提高
说明GMR是一种可以实际应用的电流检测技术.
This paper applied Giant Magneto Resistive (GMR) current sensing method in a current-driven synchronous rectifier.Comparing with the conventional current sensors
GMR current sensor can overcome the drawbacks of large loss
no DC capability
large leakage inductance and low switching frequency.The current sensing theory of GMR current sensor was discussed and a current-driven synchronous Forward converter with GMR current sensor was provided.The experimental results show that the performance of the modified Forward converter is good and its efficiency at light load is improved.
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