نتایج جستجو برای: thyristor switched capacitors
تعداد نتایج: 30722 فیلتر نتایج به سال:
approved: Gabor C. Temes In this thesis, novel design techniques have been proposed for implementing highlinearity SC circuits in a standard digital CMOS process. They use nonlinear MOSFET capacitors instead of linear double-poly capacitors. To reduce their nonlinearities, a bias voltage is applied to keep MOSFET capacitors in their accumulation regions. For further reduction of distortion, two...
This paper presents a novel concept of high-voltage-gain DC-DC converter. The converter is made up switched capacitors and passive resonant branches. A significant reduction in the count switches low voltage stress on achieved this proposed topology, comparison to that classical SC series-parallel It essential from cost, volume, efficiency standpoint. threefold. highest depends output decreased...
While early FACTS devices consisted mainly of thyristor-controlled/switched RLC/transformer components, the newer generation is based on the self-commutated voltage-source power converter. Different shunt FACTS devices, namely Static VAR compensator (SVC) and Static Synchronous Compensator (STATCOM), Dynamic voltage restorer (DVR) in transmission line using the actual line model. This paper des...
Introduction: Sample-and-hold (S/H) is an important analog building block with many applications, including analog-to-digital converters (ADCs) and switched-capacitor filters. The function of the S/H circuit is to sample an analog input signal and hold this value over a certain length of time for subsequent processing. Taking advantages of the excellent properties of MOS capacitors and switches...
The multi-phase implementation in the QR (quasi resonant) ZCS (zero current switching) SC (switched capacitor) bidirectional DC-DC converter structure has been proposed to reduce current ripple, switching loss and significantly increase the converter efficiency and power density. This approach provides a more precise output voltage to obtain voltage conversion ratios from the double-mode versus...
A novel high step-up DC-DC converter with coupled-inductor and switched-capacitor techniques is proposed in this paper. The capacitors are charged in parallel and are discharged in series by the coupled inductor, stacking on the output capacitor. Thus, the proposed converter can achieve high step-up voltage gain with appropriate duty ratio. Besides, the voltage spike on the main switch can be c...
The article discusses a nine-level switching capacitor-based common ground-type boost inverter for grid-connected photovoltaic applications. proposed structure’s direct connection between the negative terminal of input source and grid neutral eliminates leakage current. topology uses eleven switches, two diodes, three capacitors to produce double voltage with nine different levels. Self-balanci...
A high step-up DC-to-DC converter that integrates an isolated transformer and a switched-clamp capacitor is presented in this study. The voltage stress of the main power switch should be clamped to 1/4 V by using the turn ratio and switched-clamp capacitor of an isolated transformer to achieve a high voltage gain. In addition, a passive clamp circuit is employed reduce voltage stress on the mai...
This paper presents the design and simulation of a Full Bridge Soft Switched DC-DC Converter, working with an internal frequency of 20khz with an output power of 5kw. Since the ZVS range is independent of the switch capacitance, IGBT’S are used by adding the external capacitors to the switches without increasing the switching losses. However, it is not easy to design a hard-switched converter s...
Medium-voltage direct-current (MVDC) technology exhibits advantages over ac transmission due to its enhanced capacity, controllability, and flexibility. A practical example is the ANGLE-DC project from Scottish Power Energy Networks, which converts existing 33 kV circuits into dc operation improve system capacity in North Wales, U.K. Specially designed cascaded power converters are employed bui...
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