论文部分内容阅读
由于目前单个IGBT管的耐压有限,在高压大功率的应用领域需要多个电力电子器件的串联来解决额定工作电压高的问题。串联IGBT不仅可以获得更高的耐压值,其开关性能也是相同电压等级下最优秀的。串联IGBT存在的问题是串联电压不均衡所导致的局部电压过高,从而致使单个IGBT管因过电压而损坏,需要采用合适的均压控制方法。本文对有源钳位控制和磁心同步控制进行了原理及特点的讲解,比较两种方法的优缺点,并提出了一种基于两种方法的混合均压控制技术,弥补了单个方法的不足,并通过PSPICE仿真验证其可靠性及稳定性。
Due to the current limited voltage of a single IGBT tube, high voltage and high power applications require multiple power electronic devices in series to solve the problem of high rated voltage. Series IGBT can not only get higher withstand voltage, the switching performance is the same under the same voltage level of the best. The problem with a series IGBT is that the local voltage due to the unbalanced series voltage is too high, which may damage a single IGBT tube due to overvoltage, and an appropriate voltage equalization control method is required. In this paper, the principles and characteristics of active clamp control and core synchronous control are explained, the advantages and disadvantages of the two methods are compared, and a mixed voltage-sharing control technique based on the two methods is proposed to make up for the shortcomings of a single method, And through the PSPICE simulation to verify its reliability and stability.