Driver Circuit Design and Dynamic Characteristic Test of NPC Three-level IGBT Modules
于浪浪 1李贺龙 1殷千辰 1韩亮亮1
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作者信息
1. 合肥工业大学电气与自动化工程学院,合肥 230009
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摘要
二极管中点钳位NPC(neutral point clamped)三电平逆变器具备较低的开关应力、谐波分量和较好的抗干扰能力,促使其成为光伏、储能等新能源领域DC-AC变换器的主要拓扑之一.针对大功率应用场景中普遍采用的NPC三电平IGBT功率半导体模块开展研究,分析NPC三电平功率模块的换流回路,并据此给出对应换流回路的寄生参数精准仿真评估方法.依据换流回路寄生参数最小原则,设计适用于NPC三电平功率半导体模块的动态特性测试电路.根据换流回路以及电路工作原理,设计NPC三电平功率模块的驱动电路,并给出增强驱动电流、防直通及死区时间可调的驱动方案.最后,通过对NPC三电平IGBT模块的动态测试,详细评估了不同工况下功率器件的动态损耗.
Abstract
Owing to its advantages including lower switching stress, harmonic components and a better anti-interference capability, the diode neutral point clamped(NPC) three-level inverter has become a prominent topology for DC-AC converters used in new energy fields such as photovoltaic and energy storage. The NPC three-level insulated gate bipolar transistor(IGBT) power semiconductor module which is widely used in high-power applications is studied. The commutation circuit in the NPC three-level power module is analyzed, and a precise simulation and evaluation method for the corresponding parasitic parameters is given. According to the principle of minimizing the parasitic parameters of the commutation circuit, a dynamic characteristic test circuit suitable for the NPC three-level power semiconductor module is designed. Based on the commutation circuit and the operating principle of circuit, a drive circuit for the NPC three-level power module is designed, and a driving scheme that enhances drive current, prevents shoot-through and allows for adjustable dead time is formulated. Finally, through dynamic testing of the NPC three-level IGBT module, a comprehensive assessment of the dynamic loss in power devices under various operating conditions is conducted.
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