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逆导型IGBT(RC-IGBT)是将IGBT功能与续流二极管功能集成在一个芯片上,实现了在相同封装体积下,可获得更大的功率密度,由于IGBT与二极管紧密的移相热耦合,在相同散热条件下,RC-IGBT允许的工作结温更高。同时,RC-IGBT的本征二极管还受到栅极电压控制,通过栅极电压控制策略,可以降低器件损耗,优化系统特性。介绍了RC-IGBT的基本工作原理和二极管退饱和控制特性,研究了RC-IGBT应用于变流器系统的损耗优化控制策略,分析了应用RC-IGBT的单相脉宽调制(PWM)整流器的工作特性与损耗特性。通过一个具体的应用工况运行仿真,分析对比了RC-IGBT和普通IGBT在PWM整流器应用中的损耗特性。结果显示,应用RC-IGBT后总体损耗有所降低,验证了RC-IGBT退饱和脉冲控制的有效性。
Reverse Conduction IGBT (RC-IGBT) integrates IGBT function and free-wheeling diode function on a single chip to achieve greater power density under the same package size. Due to the close phase-shift thermal coupling between IGBT and diode, , In the same cooling conditions, RC-IGBT allows the junction temperature is higher. Meanwhile, the intrinsic diode of RC-IGBT is also controlled by the gate voltage. Through the gate voltage control strategy, the device loss can be reduced and system characteristics can be optimized. The basic working principle of RC-IGBT and the desaturation control characteristics of diode are introduced. The loss optimization control strategy of RC-IGBT applied to converter system is studied. The single-phase pulse width modulation (PWM) rectifier with RC-IGBT Operating characteristics and loss characteristics. The running simulation of a specific application case analyzes and compares the loss characteristics of RC-IGBT and ordinary IGBT in PWM rectifier application. The results show that the overall loss after RC-IGBT is reduced, which verifies the effectiveness of desaturation pulse control of RC-IGBT.