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The conversion between DC and AC power will typically introduce a low-frequency pulsation power in the DC side of single phase power converter which may create instability, lowers its efficiency, and reduces the reliability. In this paper, a novel Power Decoupling Modular (PDM) with 2 series differential decoupling capacitors at the ac side is proposed. Compared with the DC PDM, the proposed modular...
Ripple current at twice the output frequency exists at dc side in single phase inverter due to the instantaneous power imbalance between input and output power. Neutral-point voltage waveform control method is proposed in this paper to eliminate the ripple current in E-capless full-bridge inverter. With the proposed method, the pulsation power is controlled to only flow through ac capacitors and the...
The DC current of the single-phase inverter or rectifier contains low frequency ripple whose frequency is twice that of the AC voltage. Traditionally, electrolytic capacitor is used to eliminate these ripple, but it has relatively short lifespan and affect the lifetime of the entire inverter or rectifier system. In this paper, a single-phase bidirectional bridge topology without electrolytic capacitor...
The input current of single-phase inverter typically has an AC ripple component at twice the output frequency. The low-frequency current ripple can cause a reduction in both the operating lifetime of its DC source and the energy conversion efficiency of the system. In this paper1, a proposed waveform control method which can eliminate such a ripple current in boost inverter system, is discussed. The...
In this paper, SCR self-supplied gate driver (SSGD) technology used in auto-passing neutral section system is discussed. This technology eliminates the need for an isolated power supply board or auxiliary power supply, with substantial savings in cost and space in medium and high voltage applications. This paper describes the principle and design of SSGD and pulse amplifier, which are two key parts...
This paper presents a new cross-coupled charge pump structure which generates 2Vdd output and applies to flash memory. Compared with conventional structures, the novel scheme has lower ripple voltage, and higher efficiency. These advantages were achieved by employing the methods of reducing power loss effectively. The proposed charge pump was fabricated with TSMC 0.18 μm CMOS process. By the simulation...
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