论文标题
可变斜率梯形循环电流注入以减弱电容器电压波 - 基于模块化多层转换器的可变速度电动机驱动器应用
Variable Slope Trapezoidal Circulating Current Injection to Attenuate Capacitor Voltage Ripple in Modular Multilevel Converter Based Variable Speed Motor Drives Application
论文作者
论文摘要
由于SM-CVR与操作频率之间的反相关关系，使用模块化多级转换器基于恒定变速器可变速度电动机驱动驱动器增加了亚模块电容器电压波（SM-CVR）。为了解决此问题，将可变的斜率梯形循环电流（CC）与方波公共模式电压（CMV）一起注入。与正弦CC和正弦CMV注射相比，提出的注射技术可以在0％至50％的范围内降低CC的峰值，从而导致较小的设备应力和提高的效率。提出了该技术的仿真结果，并将其与现有注入技术进行比较，以显示优势
The main challenge in using the Modular Multilevel Converter-based constant-torque variable-speed motor drives is increased sub-module capacitor voltage ripples (SM-CVR) at lowfundamental frequency operation, due to the inverse relationship between SM-CVR and operating frequency. To address this issue, a variable slope trapezoidal circulating current (CC) is injected along with square wave common-mode voltage (CMV). Compared to sinusoidal CC and sinusoidal CMV injection, the proposed injection technique can reduce the peak of the CC in the range of 0% to 50%, resulting in lesser device stress and improved efficiency. Simulation results of the proposed technique are presented, and they are further compared with the existing injection techniques to show the superiority
