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Voltage source

About: Voltage source is a(n) research topic. Over the lifetime, 49535 publication(s) have been published within this topic receiving 512096 citation(s).

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Papers
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Proceedings ArticleDOI: 10.1109/IAS.1995.530601
Jih-Sheng Lai1, Fang Zheng PengInstitutions (1)
08 Oct 1995-
Abstract: Multilevel voltage source converters are emerging as a new breed of power converter options for high-power applications. The multilevel voltage source converters typically synthesize the staircase voltage wave from several levels of DC capacitor voltages. One of the major limitations of the multilevel converters is the voltage unbalance between different levels. The techniques to balance the voltage between different levels normally involve voltage clamping or capacitor charge control. There are several ways of implementing voltage balance in multilevel converters. Without considering the traditional magnetic coupled converters, this paper presents three recently developed multilevel voltage source converters: (1) diode-clamp, (2) flying-capacitors, and (3) cascaded-inverters with separate DC sources. The operating principle, features, constraints, and potential applications of these converters are discussed.

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Topics: Voltage source (60%), Converters (56%), Electronic circuit (52%) ...read more

3,134 Citations


Open accessJournal ArticleDOI: 10.1109/JSSC.1974.1050511
Abstract: This paper considers the design, fabrication, and characterization of very small Mosfet switching devices suitable for digital integrated circuits, using dimensions of the order of 1 /spl mu/. Scaling relationships are presented which show how a conventional MOSFET can be reduced in size. An improved small device structure is presented that uses ion implantation, to provide shallow source and drain regions and a nonuniform substrate doping profile. One-dimensional models are used to predict the substrate doping profile and the corresponding threshold voltage versus source voltage characteristic. A two-dimensional current transport model is used to predict the relative degree of short-channel effects for different device parameter combinations. Polysilicon-gate MOSFET's with channel lengths as short as 0.5 /spl mu/ were fabricated, and the device characteristics measured and compared with predicted values. The performance improvement expected from using these very small devices in highly miniaturized integrated circuits is projected.

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  • Fig. 14. Illustration of experimental technique used to determine channel length,L.
    Fig. 14. Illustration of experimental technique used to determine channel length,L.
  • Fig. 1. Illustration of device scaling principles with = 5. (a) Conventional commercially available device structure. (b) Scaled-down device structure.
    Fig. 1. Illustration of device scaling principles with = 5. (a) Conventional commercially available device structure. (b) Scaled-down device structure.
  • Fig. 8. Experimental and calculated dependence of threshold voltage on channel length for basic ion-implanted design with Vsub = 1 V, Vd = 4 V.
    Fig. 8. Experimental and calculated dependence of threshold voltage on channel length for basic ion-implanted design with Vsub = 1 V, Vd = 4 V.
  • Fig. 7. Calculated and experimental subthreshold turn-on characteristic for basic ion-implanted design for various channel lengths with Vsub = 1 V, Vd = 4 V.
    Fig. 7. Calculated and experimental subthreshold turn-on characteristic for basic ion-implanted design for various channel lengths with Vsub = 1 V, Vd = 4 V.
  • Fig. 9. Experimental drain voltage characteristics for basic ion-implanted design withVsub = 1 V, L = 1:1 , and W = 12:2 . Curve tracer parameters; load resistance 30 , drain voltage 4 V, gate voltage 0–4 in 8 steps each 0.5 V apart.
    Fig. 9. Experimental drain voltage characteristics for basic ion-implanted design withVsub = 1 V, L = 1:1 , and W = 12:2 . Curve tracer parameters; load resistance 30 , drain voltage 4 V, gate voltage 0–4 in 8 steps each 0.5 V apart.
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Topics: Field-effect transistor (55%), MOSFET (55%), Threshold voltage (53%) ...read more

2,760 Citations


Journal ArticleDOI: 10.1109/TIE.2007.907044
Jose Rodriguez1, Steffen Bernet2, Bin Wu3, J. Pontt4  +1 moreInstitutions (4)
Abstract: This paper presents a technology review of voltage-source-converter topologies for industrial medium-voltage drives. In this highly active area, different converter topologies and circuits have found their application in the market. This paper covers the high-power voltage-source inverter and the most used multilevel-inverter topologies, including the neutral-point-clamped, cascaded H-bridge, and flying-capacitor converters. This paper presents the operating principle of each topology and a review of the most relevant modulation methods, focused mainly on those used by industry. In addition, the latest advances and future trends of the technology are discussed. It is concluded that the topology and modulation-method selection are closely related to each particular application, leaving a space on the market for all the different solutions, depending on their unique features and limitations like power or voltage level, dynamic performance, reliability, costs, and other technical specifications.

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2,051 Citations


Journal ArticleDOI: 10.1109/41.720325
Marian P. Kazmierkowski1, L. Malesani1Institutions (1)
Abstract: The aim of this paper is to present a review of current control techniques for three-phase voltage-source pulsewidth modulated converters. Various techniques, different in concept, have been described in two main groups: linear and nonlinear. The first includes proportional integral (stationary and synchronous) and state feedback controllers, and predictive techniques with constant switching frequency. The second comprises bang-bang (hysteresis, delta modulation) controllers and predictive controllers with on-line optimization. New trends in current control-neural networks and fuzzy-logic-based controllers-are discussed, as well. Selected oscillograms accompany the presentation in order to illustrate properties of the described controller groups.

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Topics: Model predictive control (57%), Control theory (57%), Bang–bang control (56%) ...read more

1,985 Citations


Open accessBook
01 Jan 2007-
Abstract: Preface. 1. Introduction. 1.1. Concepts and Evolution of Electric Power Theory. 1.2. Applications of the p-q Theory to Power Electronics Equipment. 1.3. Harmonic Voltages in Power Systems. 1.4. Identified and Unidentified Harmonic-Producing Loads. 1.5. Harmonic Current and Voltage Sources. 1.6. Basic Principles of Harmonic Compensation. 1.7. Basic Principles of Power Flow Control. References. 2. Electric Power Definitions: Background. 2.1. Power Definitions Under Sinusoidal Conditions. 2.2. Voltage and Current Phasors and the Complex Impedance. 2.3. Complex Power and Power Factor. 2.4. Concepts of Power Under Non-Sinusoidal Conditions -Conventional Approaches. 2.5. Electric Power in Three-Phase Systems. 2.6. Summary. References. 3 The Instantaneous Power Theory. 3.1. Basis of the p-q Theory. 3.2. The p-q Theory in Three-Phase, Three-Wire Systems. 3.3. The p-q Theory in Three-Phase, Four-Wire Systems. 3.4. Instantaneous abc Theory. 3.5. Comparisons between the p-q Theory and the abc Theory. 3.6. Summary. References. 4 Shunt Active Filters. 4.1. General Description of Shunt Active Filters. 4.2. Three-Phase, Three-Wire Shunt Active Filters. 4.3. Three-Phase, Four-Wire Shunt Active Filters. 4.4. Shunt Selective Harmonic Compensation. 4.5. Summary. References. 5 Hybrid and Series Active Filters. 5.1. Basic Series Active Filter. 5.2. Combined Series Active Filter and Shunt Passive Filter. 5.3. Series Active Filter Integrated with a Double-Series Diode Rectifier. 5.4. Comparisons Between Hybrid and Pure Active Filters. 5.5. Conclusions. References. 6 Combined Series and Shunt Power Conditioners. 6.1. The Unified Power Flow Controller (UPFC). 6.2. The Unified Power Quality Conditioner (UPQC). 6.3. The Universal Active Power Line Conditioner (UPLC). 6.4. Summary. References. Index.

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Topics: Power factor (64%), Unified power flow controller (60%), Active filter (60%) ...read more

1,893 Citations


Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202222
2021886
20201,401
20191,640
20181,744
20171,708
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