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首页> 外文OA文献 >Asynchronous Gate Signal Driving Method for Reducing Current Imbalance of Paralleled IGBT Modules Caused by Driving Circuit Parameter Difference
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Asynchronous Gate Signal Driving Method for Reducing Current Imbalance of Paralleled IGBT Modules Caused by Driving Circuit Parameter Difference

机译：异步栅极信号驱动方法，用于减少通过驱动电路参数差引起的并联IGBT模块的电流不平衡

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摘要

Insulated-gate bipolar transistors (IGBTs) always operate in parallel for a large output current in modern high-power converter design. Suppressing dynamic current imbalance of the paralleled IGBTs is crucial for stable operation of converters. Though dynamic current imbalance could be suppressed by the symmetrical power loop design and consistent control signal, there is an inherent parameter difference in the power loop or gate circuit caused by the practical factors such as materials, physical dimensions and installation methods. The inherent difference could be compensated with gate delay control in a certain degree. The voltage and current in the key dynamic phases of IGBT are analyzed to obtain the delay compensation in gate delay control. An asynchronous gate signal driving method based on reference signal selections is proposed to suppress dynamic imbalance of collector current from parallel connected IGBTs, and the implementation of the asynchronous drive is described in brief. By using simulation software, the delay settings and dynamic current imbalance under different parameters discrepancy of drive circuit are obtained. The delay difference from key dynamic phases is calculated as the compensation for balanced dynamic current sharing under two selections of reference signals. Furthermore, the dynamic current distribution in the turn-on and turn-off phases is compensated by the asynchronous drive control. The optimization of asynchronous drive method on dynamic current sharing of paralleled IGBTs is verified by comparing dynamic current imbalance between the system with compensation and the system without compensation.
机译：绝缘栅双极晶体管（IGBT）始终并联运行，用于现代大功率转换器设计中的大输出电流。抑制并联IGBT的动态电流不平衡对于转换器的稳定运行至关重要。尽管可以通过对称电源回路设计和一致的控制信号来抑制动态电流不平衡，但由于材料，物理尺寸和安装方法等实际因素引起的电源环或栅极电路中存在固有的参数差异。可以在一定程度上用栅极延迟控制来补偿固有的差异。分析IGBT的关键动态相中的电压和电流，以获得栅极延迟控制中的延迟补偿。提出了一种基于参考信号选择的异步栅极信号驱动方法来抑制来自并联连接的IGBT的集电极电流的动态不平衡，并且简要地描述了异步驱动器的实现。通过使用仿真软件，获得了驱动电路的不同参数下的延迟设置和动态电流不平衡。从键动态阶段的延迟差异计算为在两种参考信号下进行平衡动态电流共享的补偿。此外，通过异步驱动控制来补偿导通和关闭阶段中的动态电流分布。通过比较系统之间的动态电流不平衡和系统而无需补偿，通过比较系统之间的动态电流不平衡来验证对并联IGBT的动态电流共享的异步驱动方法的优化。

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