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首页> 外文期刊>International journal of electronics >Design and implementation of a novel synchronous-rectifier forward converter with improved performance
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Design and implementation of a novel synchronous-rectifier forward converter with improved performance

机译：具有改进性能的新型同步整流正激变换器的设计与实现

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摘要

This article proposes two new methods for improving the performance of a synchronous-rectifier forward converter. A synchronous-rectifier converter produces a reverse current in the inductor due to the bidirectional characteristic of MOSFETs while the converter is turned off. This reverse current causes voltage spikes which may damage the power devices. This article proposes two methods to reduce the voltage spikes: method 1 and method 2. Method 1 uses the enable signal detection method. An enable signal is generated from the remote control of the system when the main power is turned off. Then, the proposed circuit of method 1 turns off the free-wheeling switch before the reverse current is produced. As a result, the voltage spike can be avoided. Method 2 uses a transformer winding to detect the turn-off time of the input power. Then, the circuit turns off the free-wheeling switch to break the resonant loop and end the reverse current. The cost analysis of method 1 and 2 is included. In addition, several experimental results are provided to validate the correctness and feasibility of the theoretical analysis.
机译：本文提出了两种改善同步整流器正激转换器性能的新方法。当转换器关闭时，由于MOSFET的双向特性，同步整流器转换器会在电感器中产生反向电流。这种反向电流会引起电压尖峰，从而可能损坏功率设备。本文提出了两种降低电压尖峰的方法：方法1和方法2。方法1使用使能信号检测方法。当主电源关闭时，将通过系统的遥控器生成启用信号。然后，在产生反向电流之前，方法1的建议电路会关断续流开关。结果，可以避免电压尖峰。方法2使用变压器绕组来检测输入电源的关闭时间。然后，电路关闭续流开关，以断开谐振环路并结束反向电流。包括方法1和2的成本分析。此外，提供了一些实验结果以验证理论分析的正确性和可行性。

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  • 来源
    《International journal of electronics》 |2010年第8期|P.927-943|共17页
  • 作者

    Tian-Hua Liu; Kuan-Sheng Wang;

  • 作者单位

    Department of Electrical Engineering, National Taiwan University of Science and Technology, 43, Section 4, Keelung Road, Taipei 106, Taiwan;

    rnDepartment of Electrical Engineering, National Taiwan University of Science and Technology, 43, Section 4, Keelung Road, Taipei 106, Taiwan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    synchronous-rectifier forward converter; reverse current; voltage spikes;

    机译：同步整流器正激转换器;反向电流电压尖峰;

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