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This paper reports on a design of a balanced filter based the miniaturized multilayer LTCC technology (Low Temperature Co-Fired Ceramics) which is widely used for Bluetooth and Wireless LAN. It is consist of a folded SIR (stepped impendence resonator) bandpass filter with two transmission zero and a improved Marchand balun. The two elements are cascaded via a through hole in vertical direction for...
This paper investigates the inherent damping characteristic of LCL- filters for three-phase grid-connected voltage source inverters. Specifically, it is found that when the converter-side current is used for implementing the feedback control, there will be an inherent damping term embedded in the control loop, which can neutralize the resonance introduced by LCL- filters. Theoretical analysis is then...
In this paper, a double-edge modulation based one-cycle-control (OCC) scheme is presented for regulation of active rectifier. With minor modifications made in OCC core, the nonlinear carrier formed by integration and reset of dc-link voltage error turns out to be a symmetrical triangle waveform in steady-state, which can effectively eliminate the even order harmonics generated by the conventional...
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