...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Power Electronics, IET >Wide voltage gain range application for full-bridge LLC resonant converter with narrow switching frequency range
【24h】

Wide voltage gain range application for full-bridge LLC resonant converter with narrow switching frequency range

机译：具有窄开关频率范围的全桥LLC谐振转换器的宽电压增益范围应用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In wide voltage range applications, traditional LLC converters suffer from the following issues: (i) to cover a wide voltage gain operating range, the required switching frequency range is also large, which challenges the design and optimisation of magnetic components, gate driver circuitry, and electro-magnetic interference filter; (ii) a small magnetising inductance is preferred in wide voltage gain range application, which leads to the increase of circuit circulating current and corresponding conduction loss; (iii) passive elements are determined based on the minimum switching frequency, so bulky passive elements are required to satisfy the required operation range. To solve these problems, in this study, a full-bridge LLC (FBLLC) resonant converter with two operation modes, namely full-bridge operation and frequency doubler operation, is proposed for wide voltage gain range application. The FBLLC converter discussed in this study can be designed in half of the input voltage range when compared with the conventional method, so smaller switching frequency operating range and higher efficiency operation are guaranteed. In addition, the smooth mode transition is achieved by introducing switching frequency feedforward control and small output voltage overshoot or undershoot is observed. A 150 W experimental prototype was built to validate the theoretical analysis.
机译：在宽电压范围应用中，传统的LLC转换器遭受以下问题：（i）覆盖宽电压增益工作范围，所需的开关频率范围也很大，这挑战了磁性部件的设计和优化，栅极驱动电路，和电磁干涉过滤器; （ii）在宽电压增益范围应用中，小磁化电感是优选的，这导致电路循环电流和相应的导通损耗的增加; （iii）基于最小开关频率确定无源元件，所以需要庞大的无源元件来满足所需的操作范围。为了解决这些问题，在本研究中，提出了一种具有两个操作模式的全桥LLC（FBLLC）谐振转换器，即全桥操作和频率倍增操作，用于宽电压增益范围应用。本研究中讨论的FBLC转换器可以设计成与传统方法相比的输入电压范围的一半，因此保证了更小的开关频率操作范围和更高的效率操作。另外，通过引入开关频率前馈控制来实现平滑模式转变，并且观察到小输出电压过冲或下冲。建立了150 W实验原型以验证理论分析。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号