In this paper, the design and integration of coupled inductors have been proposed for a flying-capacitor (FC) modular multilevel converter (MMC) for induction motor drive applications. In the conventional three-phase FC-MMC, twelve discrete inductors are needed for three legs. However, by integrating one coupled inductor with two windings in two half-arms, the number of inductors required is reduced from 12 to 6. Accordingly, the overall volumes and weights of cores and windings can be reduced by 41.7% and 41.4% when compared with discrete inductors. To confirm the validity of the proposed coupled inductor, a 4160-V/1-MW simulation model of a FC-MMC and a 220-V/3-kW scaled-down prototype have been built, of which performance for induction motor drives has been tested from standstill to the rated speed.

中文翻译：

---

带有六个耦合电感的三相飞电容 MMC

在本文中，针对感应电机驱动应用的飞跨电容器 (FC) 模块化多电平转换器 (MMC) 提出了耦合电感器的设计和集成。在传统的三相 FC-MMC 中，三个支路需要十二个分立电感器。然而，通过将一个耦合电感器与两个半臂中的两个绕组集成在一起，所需的电感器数量从 12 个减少到 6 个。因此，相比之下，磁芯和绕组的整体体积和重量可以减少 41.7% 和 41.4%带分立电感器。为了确认所提出的耦合电感器的有效性，建立了 FC-MMC 的 4160-V/1-MW 仿真模型和 220-V/3-kW 缩小原型，其中感应电机驱动器的性能具有经过从静止到额定转速的测试。