voltage rectifier Articles

  • A bridgeless DIVM buck PFC rectifier with digital control and voltage doubler configuration

    A new digitally controlled, bridgeless AC/DC buck converter that operates in discontinuous–input–voltage mode (DIVM) is presented. It inherits power factor correction property and draws continuous input current during conduction period. In addition, the efficiency of the proposed buck PFC rectifier is improved by adopting a bridgeless configuration. The converter also works as a voltage–doubler ...


    By Inderscience Publishers

  • Non-isolated single stage PFC rectifier for wide-input large step-down voltage applications

    This paper proposes a non-isolated single-stage high power factor rectifier suitable for applications requiring low-voltage and high-current output. The proposed converter integrates two buck-boost converters with a buck converter. As a result, the proposed converter can operate over a wide range of input voltage with extended low output voltage capability, making it suitable for universal input ...


    By Inderscience Publishers

  • Comparative control analysis of the Vienna rectifier based on its averaged model

    This paper presents a comparative evaluation of two multiple-loops duty-cycle-based control schemes applied to a three-phase three-switch three-level boost-type rectifier. The control laws are both elaborated on the basis of a state-space averaged model of the converter, expressed in the synchronous rotating frame. On the one hand, a control scheme that uses linear regulators is designed by using ...


    By Inderscience Publishers

  • Three–level NPC rectifier–based midpoint converter–fed SRM drive

    This paper deals with a three–level Neutral Point Clamped (NPC) rectifier–based midpoint converter–fed Switched Reluctance Motor (SRM) drive. The three–level NPC rectifier for midpoint converter–fed SRM drive is used for improving power quality at AC mains and to balance the DC link capacitor voltages. The proposed three–level NPC rectifier is designed, modelled and its performance simulated ...


    By Inderscience Publishers

  • Direct power control of the PWM rectifier using sliding mode control

    This paper presents the analysis and design of the direct power control of a boost PWM rectifier based on sliding mode control. In the aim to improve control performance of the rectifier, the proposed approach combines the merits of sliding mode control, direct power control and space vector modulation. The resulting control scheme is able to drive the output dc voltage to the desired value while ...


    By Inderscience Publishers

  • Modelling, design and control of a SEPIC power factor corrector for single–phase rectifiers: experimental validation

    In this paper, a new general case switching–function–based model is proposed for a DC–to–DC single ended primary inductance converter (SEPIC). Compared to conventional buck or boost converters, this topology allows a low current ripple at the input for a relatively low level of the DC–bus voltage. The converter is used as a power factor correction (PFC) circuit for a single–phase rectifier and, ...


    By Inderscience Publishers

  • Brownian motion of magnetic nanoparticles as a source of energy?

    Brownian motion of magnetic nanoparticles in a low–density gas can induce random voltage pulses in a microscopic electric circuit containing a high–number–of–turns coil and a classical diode rectifier. The amplitude of the voltage pulses is estimated and the rectification condition examined. We have shown that in our toy–model nanogenerator where the motion of the magnetic nanoparticle is ...


    By Inderscience Publishers

  • Single–phase switch mode high power quality cycloconverters

    In this paper, we propose three new single–phase switch mode cycloconverters. Instead of simple switching scheme of P– and N–controlled rectifier–converters, high frequency switching of full bridge rectified outputs has been used with the help of SMPS topologies. This enables the input current switching at high frequencies and effective current shaping using passive filters. The input supply is ...


    By Inderscience Publishers

  • Analysis, design and control of a two stage improved power quality telecommunication power supply

    This paper deals with the power quality improvement at the utility interface of a telecommunication switched mode power supply (SMPS) of 12 kW rating. The first stage of this SMPS consists of a 6–pulse diode bridge converter that performs ac–dc conversion yielding an unregulated dc voltage. In the second stage, two boost rectifiers are connected together which feed to a boost dc–dc full bridge ...


    By Inderscience Publishers

  • Electrical conduction of calf-thymus DNA molecules

    We present theoretical calculations to explain the behaviour of electrical conduction in calf-thymus DNA molecules trapped between a gap of 10 nm Au electrodes. Our work further explains the experimental I-V data reported for these DNA molecules that shows both large electrical hysteresis and voltage gap. We attribute their data to energy conservation within the molecules and electrons transfer ...


    By Inderscience Publishers

  • A new microturbine-based dispersed generation scheme

    Almost all of the commercial microturbine-based dispersed generation systems today are composed of a high-speed permanent-magnet alternator and a diode rectifier-PWM inverter pair. A dispersed generation scheme made up of a microturbine, an induction generator, and a diode rectifier-PWM inverter pair is introduced in this paper. A complete model for the self-excited squirrel-cage induction ...


    By Inderscience Publishers

  • Modelling and control of a variable speed wind turbine driving doubly fed induction generator using three–level PWM converter

    The aim of this researcher is to develop a complete wind central model driven doubly fed induction generator (DFIG) which feeds an AC power grid. For that, two–pulse width modulated (PWM) voltage converters are connected back to back between the rotor terminals of DFIG and the utility grid via a common DC link, in there, our contribution will appear in the utilisation of three levels voltage ...


    By Inderscience Publishers

  • Power Inverter Basics

    Basic knowledge of power inverter Power inverter mainly adopts the PWM at present, controller switch to DC rapidly in a pulse-period to ensure that the DC integral value is equal to the sampling values of AC sine wave at the same time. After filtered, more than 96% sine wave output can be realized. Pulse inverter is self-excited inverter that output voltage is pulse modulation. This kind ...


    By GoHz Inc

  • Study, modelling and control of a single-phase power factor corrector based on the Sheppard-Taylor topology

    In this paper, a single-phase power factor corrector (PFC) based on the Sheppard-Taylor topology is studied. A novel mathematical representation of the converter is elaborated using the state-space averaging technique. In order to emphasise the usefulness of such model, three pulse-width-modulated (PWM) multi-loops control schemes are proposed and developed in the aim of ensuring a unity power ...


    By Inderscience Publishers

  • Change 60Hz to 50Hz Power

    In conventional power supplies, the mains is rectified (that means the negative parts of the main cycle are flipped over to become positive). This gives 50 or 60 positive pulses per second. These pulses are used to charge up capacitors that store the charge between top ups. If you put a scope on the capacitor, you will see a sawtooth waveform that shows the top of the pulse, then the voltage ...


    By Shenzhen Gozuk Co., Limited

  • Performance evaluation of CSI-based unified power quality conditioner using artificial neural network

    In recent years unified power quality conditioner (UPQC) is being used as a universal active power conditioning device to mitigate both current as well as voltage harmonics at a distribution end of power system network. The performance of UPQC mainly depends upon how quickly and accurately compensation signals are derived. The artificial neural network (ANN) trained with conventional compensator ...


    By Inderscience Publishers

  • Modelling of DSTATCOM for distribution system

    This paper deals with the simulation of distribution static synchronous compensator (DSTATCOM) for improving power quality of a distribution system feeding linear as well as non-linear loads. Nowadays, there are an increasing number of non-linear loads which inject harmonics into the system. A three-phase insulated gate bipolar transistor- (IGBT-)based current controlled voltage source inverter ...


    By Inderscience Publishers

  • Difference between Frequency and high-frequency forklift

    First, the difference between the high frequency and power frequency Workers Electric Reach Truck charger power devices operating in the linear state, which means he used up the power device is always at work, and therefore would result in low efficiency of his work, generally in the range of 50% to 60%, have to say he is good linear ...

  • Customer case: Telenor reaps the benefits of remote power

    The Norwegian telco operator Telenor applies Eltek's "remote power" concept in their mobile network, distributing 380 V DC to Remote Radio Units (RRUs) - with significant documented savings as a result. In collaboration with Eltek, the Telenor Technology Centre has developed a solution for High Voltage Distribution which offers completely new opportunities and savings for the development of the ...


    By Eltek AS

  • A novel particle swarm optimisation self-regulating stand-alone wave energy conversion scheme

    The paper presents a novel stabilisation scheme system for a wave energy converter (WEC) using permanent magnet linear generator (PMLG) connected to a six-pulse diode rectifier. The proposed controller of WEC-battery renewable energy system is based on multi-objective particle swarm optimisation (MOPSO) technique. The optimisation algorithm is implemented to control a novel low cost dynamic AC ...


    By Inderscience Publishers

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