The inductor, which is of alternating current, exchanges power between different ports of the single-phase system. The proposed topology singletreff fehmarn capable of accomplishing voltage step-up or step-down, suppressing the ripple power, and performing inversion or rectification operation in one stage of power conversion.
The proposed configuration offers an active decoupling function, which not only eliminates the double-frequency ripple power at the dc-side but also achieves minimum capacitance requirements to minimize the size of the decoupling capacitor.
This facilitates the use of a small thin-film capacitor, which offers a longer life-cycle and higher reliability compared with a bulky electrolytic capacitor.
A control approach is also developed to regulate the dc-side and ac-side currents and manage the ripple power through proper distribution of power between each port. Moreover, a very small capacitor can be placed in parallel with the inductor to reinforce the proposed configuration with soft-switching operation, which enhances the overall efficiency and minimizes the voltage stress over the semiconductor devices.
The primary focus of this paper is dc-to-ac conversion mode of operation, in spite of the fact that it can easily be configured to serve as a rectifier. Experimental and simulation results are presented to validate the operation of the proposed topology and its control strategy.
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