current rectifier Articles

  • 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

  • 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

  • Peristaltic Pumps play key role in rectifying the pH balance of mine water

    After decades of uncontrolled industrial (mining) activities, water supply is under serious threat. Studies show that acid water levels in the country's mines are rising at a staggering average rate of 0.59 m/day. The water situation is in fact threatening the population’s survival. At the heart of resolving this problem are the treatment of water and wastewater. This article looks at ...

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • Nottingham - Condensing Combi-Boiler case study

    Customer: Mr Tony Goodyear, Heating Engineer Location: Nottingham Heating System: Gas Condensing Combi Boiler installed: 08/07 Problems: New condensing boiler fitted within the past 12 months had failed to rectify noise from pump and problems with air present in ...


    By Vortex Energy Saver

  • 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

  • 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

  • Marine AC UPS for Critical Offshore Installations

    Equipment installed in ships or offshore installations typically operate under tough conditions, and any possible equipment failures can have serious cost impact. Despite this, products not really suited for the applications are often chosen based on the initial cost rather than looking at the total cost of ownership. One example is the use of a modular marine AC UPS versus the use of a modified ...


    By Eltek AS

  • 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

  • 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

  • Cereform - case study

    As part of the global AB Maury Group, Cereform is providing a comprehensive range of technical bakery ingredients like dough conditioners and softeners, bread mixes and concentrates, soya flours, cake mixes and concentrates, donut mixes and concentrates and toppings, fillings and icings. During the production of these products they have various dust producing processes. One of the processes ...


    By Inteliair Ltd

  • Recycling of cardboard, PET and aluminium drinks cans in new channel baling presses - Case Study

    Europe's largest logistics provider, Euro Pool System, in Hungary with new recycling hall In neatly lined-up wire cage carts, cardboard, PET bottles and cans from 175 branches of a supermarket chain in Hungary wait to be compressed into bales. The used packaging is carried via chain conveyors into two parallel channel baling presses and it's there they are tightly compacted. Two shifts a ...


    By HSM GmbH + Co. KG

  • On-Site Sodium Hypochlorite Generation

    AbstractIn this manuscript the on-site generation of sodium hypochorite for water and wastewater disinfection will be examined. The objective of this paper is to familiarize the reader with the equipment and operational requirements necessary for on-site sodium hypochlorite generation systems. This manuscript will review the following topics relative to on-site generation systems: Understand the ...

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