current rectifier Articles
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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Celebrate Summer Solstice with Solar Battery Backup
It’s that time of year again. Tomorrow is the Summer Solstice, aka the first day of summer, the longest day of the year, and the day of the year with more sunlight than any other in the Northern Hemisphere. For most of us in the U.S., we will experience somewhere around 15 hours or so of daylight tomorrow. But, did you know, more energy from the sun will reach the surface of the Earth in ...
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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 of ...
By GoHz Inc
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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 power. Linear power supply works, so that he must change from ...
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What is an Alternator? How does it Work?
Electricity in your car is as important as it is in your home. All the vehicles have a dedicated device, alternator, which runs all the electronic parts. Find out what exactly an alternator is how does it work to provide electricity to our vehicle. What is an alternator? The alternator is an electric generator that converts mechanical energy into electrical energy, particularly in the ...
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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
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