IGBT串联均压方法综述
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国家重点研发计划资助项目(2018YFB0905700,2018YFB0905705)


Review of Voltage Balancing Methods for Series-connected IGBTs
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The National Key Technologies R&D Program of China;National Natural Science Foundation of China

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    摘要:

    绝缘栅双极性晶体管IGBT(insulated gate bipolar transistor)在高电压场合应用时需串联使用满足电压需求。由于器件内部的性能差异和外围电路参数不一致等,引起IGBT模块之间电压不均衡问题,威胁其运行安全。综述了国内外IGBT串联均压方法的发展及其研究现状。根据均压方法机理的不同,将IGBT串联均压方法分为被动均压方法和主动均压方法两种,进一步将主动均压方法归纳为无源控制方法和有源控制方法两类。根据各类方法的基本电路拓扑分析了均压原理,梳理了不同方法在电路拓扑、参数选择和控制策略等方面的优化和最新进展。通过均压效果、附加损耗和可靠性等多方面对不同均压方法进行对比,被动均压方法拓扑简单不需外加控制电路更适合在低频应用场合,在高频应用场合中,准有源栅极控制法以单驱动与无源器件相结合的方式,具有良好的发展前景。最后对IGBT串联均压方法进行了展望。

    Abstract:

    Under high voltage scenarios, insulated gate bipolar transistors (IGBTs) need to be connected in series to satisfy the voltage requirements. Due to the performance difference inside the device and the inconsistent peripheral circuit parameters, the voltage imbalance between IGBT modules will be caused, thereby endangering their operation safety. In this paper, the development of voltage balancing methods for series-connected IGBTs at home and abroad and their research status are reviewed. According to different voltage balancing control mechanisms, the voltage balancing methods for series-connected IGBTs are divided into two types, i.e., active and passive. Moreover, the former is classified into reactive and active control methods. According to the basic circuit topology of various methods, the principle of voltage balancing is analyzed, and the optimization and latest progress of different methods are summarized from aspects such as circuit topology, parameter selection, and control strategy. By comparing different voltage balancing methods in terms of voltage balancing effect, additional loss, and reliability, it can be seen that the passive voltage balancing method has a simple topology and does not need any additional control circuit, which is more suitable for low-frequency application scenarios. In high-frequency application scenarios, the quasi-active gate control method combines single drive with passive devices, which has a good development prospect. Finally, the voltage balancing methods for series-connected IGBTs are prospected.

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张雪珺,黄萌,刘佳鸿,梁琳,查晓明. IGBT串联均压方法综述[J].电源学报,2021,19(1):192-204

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  • 收稿日期:2019-12-09
  • 最后修改日期:2020-09-07
  • 录用日期:2020-03-28
  • 在线发布日期: 2021-01-21