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This paper proposed an improved dual-edge modulation (IDM) for digital average voltage (DAV) controlled switching converters. The DAV control can regulate the output voltage of switching converter without a PI compensator. Different from the conventional symmetrical dual-edge modulation (SDM) method, the IDM has double sampling points in one switching cycle, which ameliorates the transient performance...
The paper conducted a theoretical analysis and experimental research on the modulation strategy, capacitor voltage control strategy as well as capacitor pre-charge control strategy of modular multilevel converter (MMC). According to the mathematical model of MMC, The combination of CPS-SPWM modulation strategy and capacitor voltage balancing algorithm based on selection of sub-modules is proposed...
This paper proposes an improved SVPWM-based digital predictive current controller for grid-side of motor energy feedback inverters. Firstly, a predictive current control strategy in the inner loop was adopted to minimize the system delay and improve the current response so that the grid-side current harmonics can be sharply reduced. Besides, load current feedforward compensation was added to reduce...
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