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This paper presents a digital current controller for zero-current transition (ZCT) bidirectional converters. In order to reduce switching losses and noises, a soft-switching technique is adopted. It is suitable for the pulse-width modulation (PWM), because the resonant transition is very short and it is independent of the switching frequency. A field programmable gate array (FPGA) and a 2.5 MHz analog...
This paper proposes how to realize high efficiency of 95% for the high frequency AC link converter of three-phase input and output. The proposed control method is based on virtual converter system control method without resonant. Two novel approaches are proposed in this paper. First, reducing method of a switching loss is proposed. The proposed method realizes zero voltage switching for generator...
Zero-current transition (ZCT) converters for wind power generation systems are proposed. In order to reduce switching losses and noises, a soft-switching technique is adopted. It is suitable for the pulse-width modulation (PWM), because the resonant transition is very short duration and it is independent of the switching frequency. A laboratory prototype using a digital controller for the ZCT converter...
A zero-voltage transition (ZVT) flyback inverter is proposed. The current in the flyback transformer is controlled in the fixed frequency, and the pulse width is varied to make the inductor current sinusoid. In order to reduce switching losses and noises, a soft-switching technique is adopted. The soft-switching technique is called the switched snubber circuit or the primary current steering technique...
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