A control scheme is presented for a dual inverter drive with a floating capacitor bridge, with decoupled motor and capacitor dynamics. A stator current reference frame is used that decouples the real and reactive power components of the motor and enables the decoupling of the motor and capacitor dynamics. Apart from the high frequency voltage ripple due to the inverter switching pattern, the capacitor voltage can be kept constant even during large step changes in motor speed reference and load torque. This allows for the use of a significantly smaller floating bridge capacitor whose size depends only on the steady-state high frequency voltage ripple. Additionally, the number of PI regulators used compared to previous works and the dc-link voltage requirements are both reduced.

中文翻译：

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开放式绕组感应电机双逆变器驱动的解耦浮动电容电压控制

提出了一种控制方案，用于带有浮动电容器桥的双逆变器驱动器，具有去耦电机和电容器动态。使用定子电流参考系来解耦电机的有功和无功功率分量，并使电机和电容器动态解耦。除了由于逆变器开关模式引起的高频电压纹波外，即使在电机速度参考和负载转矩的大阶跃变化期间，电容器电压也可以保持恒定。这允许使用显着更小的浮桥电容器，其尺寸仅取决于稳态高频电压纹波。此外，与之前的工作相比，使用的 PI 调节器数量和直流链路电压要求都减少了。