Regulated Power Supply Research Articles

Design of DC Regulated Power Supply Based on Earth Wire

This paper firstly analyzes the current problems of power supply monitoring equipment in transmission line, illustrates the application limit of photovoltaic panels power currently used in the design of a new type of power supply, and the lightning protection grounding is proposed based on the. Before the power supply design, the paper introduces the principle of ground energy and the connection way of lightning protection in China, analyzes the characteristics and limitations of the different grounding methods, and then puts forward the general requirements for the design of the power supply. On this basis, the design of the transformer, rectifier, filter, voltage regulator, auto start and auto parts, respectively, for each part of the analysis and calculation, the final realization of the power transmission line in the extraction and use of the purpose.

Design of Regulated Power Supply and Electric Leakage Protection Circuit with Low Dropout Regulator Function in Food Temperature System

Design of Regulated Power Supply and Electric Leakage Protection Circuit with Low Dropout Regulator Function in Food Temperature System

Design of a Flyback Switching Power for Smart Meter

With switching power supply being widely used in Smart Meter, there exists more restrictions on the performance of it. This paper designs a single-ended flyback switching power supply based on LNK364DN chips which is used in intelligent single-phase table, Compares the advantages and disadvantages of the switching power supply and the traditional linear regulated power supply, and introduces the reaction type switching power supply design principle and working process. In order to satisfy the security requirements, this paper also designs the EMI suppression circuit, surge suppression current, clamp circuit, etc. The design process, including the maximum duty cycle including transformer, the primary inductance calculation, etc, of the flyback type switch power supply transformer is introduced in detail. The experimental results show that the switch regulated power supply has small volume, good electromagnetic compatibility, small ripple, low power consumption, high efficiency of AC/DC transform and excellent performance .

Design of Fast Transient Response, Low Dropout Regulator with Enhanced Steady State Characteristics on the Basis of PID Control

Design and implementation of control systems for power supplies require the use of efficient techniques that provide simple and practical solutions in order to fulfill the performance requirements at an acceptable cost. Application of manual methods of system identification in determining optimal values of controller settings is quite time-consuming, expensive and, sometimes, may be impossible to practically carry out. This paper describes an analytical method for the design of a control system for a fast transient response, low dropout (LDO) linear regulated power supply on the basis of PID compensation. The controller parameters are obtained from analytical model of the regulator circuit. Test results showed good dynamic characteristics with adequate margin of stability. This study shows that PID parameter values sufficiently close to optimum can easily be obtained from analytical study of the regulator system. The applied method of determining controller settings greatly reduces design time and cost.

Electronic Power Conditioner for Ku-band Travelling Wave Tube

A highly sophisticated regulated power supply is known as electronic power conditioner (EPC) is required to energise travelling wave tubes (TWTs), which are used as RF signal amplifiers in satellite payloads. The assembly consisting of TWT and EPC together is known as travelling wave tube amplifier (TWTA). EPC is used to provide isolated and conditioned voltage rails with tight regulation to various electrodes of TWT and makes its RF performance independent of solar bus variations which are caused due to varying conditions of eclipse and sunlit. The payload mass and their power consumption is mainly due to the existence of TWTAs that represent about 35 % of total mass and about 70–90 % (based on the type of satellite application) of overall dc power consumption. This situation ensures a continuous improvement in the design of TWTAs and their associated EPCs to realize more efficient and light products. Critical technologies involved in EPCs are design and configuration, closed loop regulation, component and material selection, energy limiting of high voltage (HV) outputs and potting of HV card etc. This work addresses some of these critical technologies evolved in realizing and testing the state of art of EPC and it focuses on the design of HV supply with a HV and high power capability, up to 6 kV and 170 WRF, respectively required for a space TWTA. Finally, an experimental prototype of EPC with a dc power of 320 W provides different voltages required by Ku-band TWT in open loop configuration.

Parallel Active Filter for Twelve Pulse Controlled Rectifier based on Predictive Current Control

Twelve pulse controlled rectifier's (TPCR's) are mainly employed by regulated power supplies owing to its accurate performance. With symmetrical/asymmetrical firing to every one of its series connected six pulse converter present in the TPCR, grid current harmonics is introduced and the power factor is degraded. This paper aims at dealing with the grid current harmonics, which is a double-nested predictive current control (DNPC) compensation and a parallel active filter (PAF) used is presented for TPCR. The DNPC scheme makes use of a vector resonant controller, and the PAF which operates in the form of an equivalent multiband rejection filter which is in parallel between the nonlinear loads and the grid source, rejecting the chosen harmonics components to flow from the load side into the grid side. A sequential process for implementing these DNPC technique in MATLAB/Simulink environment is demonstrated. Moreover, an elaborate analysis over the performance and then the comparison of performance is provided in the research work.

Electricity supply characteristics of a biogas power generation system adjacent to a livestock barn

In order to consider the potential for electricity supply from a biogas power generation system (BGP) located adjacent to a livestock barn, the power balance was determined by using both simulation and actual measurement. Examination of power balances at the barn and the BGP showed that a certain amount of electricity for supply could be secured based on load leveling in both tie-stall barns and free-stall barns. BGPs are a viable renewable energy (RE) power source that can produce enough electricity for system operation and maintenance as well as a significant surplus of supply for power companies and other users. BGPs have the potential to allow output control appropriate for the relevant amount of gas storage. Further, output control based on the use of a gas holder in combination with changes in the number of biogas generators could allow more efficient usage of biogas. Specifically, the range of power output adjustment can be widened through parallel operation of several biogas generators, instead of a single generator. In other words, one biogas generator uses a constant power supply, and the other uses it to control the output for the related amount of gas storage. In this way, the possibility of achieving a constant electricity output through biogas power generation system and a regulated power supply was demonstrated.

Line Current Harmonic Reduction in AC-DC PWM Converter Using Genetic Algorithm

In this paper, AC/DC converters are widely used to get regulated power supply for battery charging and DC motor speed control. SCR converters are preferred in the field of High voltage DC energy transmission, superconductor magnetic energy storage, etc. However these converters have low power factor and also result in higher order harmonics.This paper proposes the application of Genetic algorithms (GAs) to find the switching angles for line current harmonic reduction in AC/DC type converter. Harmonic reduction is redrafted as an optimization problem and GA is applied.The harmonic elimination methods used in AC/DC converters are similar to those employed in PWM inverters or in AC choppers. The solution is obtained using genetic algorithm tool in MATLAB. The dual objectives of harmonic elimination and output voltage regulation are reframed as an optimization task and the switching instances are identified through the steps of GA.

Design and Performance Test of a Novel Type of Gas Path Brake Control System Testing Instrument

This paper presents the structure design and the performance testing method of a novel type of gas braking control system. Based on PDSOFT 3D design method double gas detection instrument control system has been carefully designed, effectively using the space of the case body. Using a direct acting overflow pressure reducing control technology, effectively through gas level decompression pressure were quickly and accurately is reduced to 0.7Mpa and 0.45Mpa, according to the tightness test results show, the tester can keep the pressure stability of the error is less than 0.1%. With quick joints of interlocking sealing design technology based on, settle the problem of connecting and sealing between the traction chassis brake system pneumatic hose and gas path instrument brake control pipeline, detection of gas pipeline. In the design of DC regulated power supply, the innovation to the DC voltage stabilizing circuit modular design, can effectively avoid the input voltage fluctuation on the influence of the load end, to ensure the stable operation of the independent power supply module tester. The tester can be easily used to test their performance general traction air braking system chassis in the stationary state, and can be directly used digital display reading way test data will be output directly, save the test time, improve the test efficiency.

An RF energy harvesting power management circuit for appropriate duty-cycled operation

In this study, we present an RF energy harvesting power management unit (PMU) for battery-less wireless sensor devices (WSDs). The proposed PMU realizes a duty-cycled operation that is divided into the energy charging time and discharging time. The proposed PMU detects two types of timing, thus, the appropriate timing for the activation can be recognized. The activation of WSDs at the proper timing leads to energy efficient operation and stable wireless communication. The proposed PMU includes a hysteresis comparator (H-CMP) and an RF signal detector (RF-SD) to detect the timings. The proposed RF-SD can operate without the degradation of charge efficiency by reusing the RF energy harvester (RF-EH) and H-CMP. The PMU fabricated in a 180 nm Si CMOS demonstrated the charge operation using the RF signal at 915 MHz and the two types of timing detection with less than 124 nW in the charge phase. Furthermore, in the active phase, the PMU generates a 0.5 V regulated power supply from the charged energy.

Simulation of DC Regulated Power Supply by SVPWM Control

To make the voltage of and the power factor of AC side adjustable, according to the working principle of the three-phase voltage source PWM rectifier,establish the mathematical model of DC regulated power supply, introduce the space voltage vector modulation technology, and build its circuit model based on SVPWM control on the Matlab/Simulink software platform, The simulation results show that this control strategy is feasible.

Y-Source Boost DC/DC Converter for Distributed Generation

This paper introduces a versatile Y-source boost dc/dc converter intended for distributed power generation, where high gain is often demanded. The proposed converter uses a Y-source impedance network realized with a tightly coupled three-winding inductor for high voltage boosting that is presently unmatched by existing impedance networks. The proposed converter also has more variables for tuning the required gain and, hence, more degrees of freedom for meeting design constraints. These capabilities have been demonstrated by mathematical derivation and experimental testing. For the experiments, a 300-W prototype has been built in the laboratory using silicon carbide devices for better efficiency. The prototype has been tested with a regulated power supply, before operating it with a high-temperature proton-exchange-membrane fuel cell. Results obtained confirm the practicality and performance of the proposed converter.

Simulation and Dynamic Performance analysis of HVDC Power Transmission Using Wind Power Generation

This paper proposes a simulink model of wind turbine using induction generator and performance analysis of high voltage direct current power converter station. This paper also shows how wind power can easily be generated with help of induction generator. The need of developing such a system promoted the utilization of nonconventional energy resources like wind power. For a developing country like India the electrical energy much mire required to achieve the estimated targets within the specified period of time. Since the power generation is not only our concern but also power transmission have great importance to transport the electrical energy over long distance easily and efficienctly, which ensures uninterrupted and regulated power supply at load end. Hence this paper also proposes a model to transmit electrical power in DC form. Since it is difficult to load long extra high voltage (EHV) ac lines to their thermal limits as a sufficient margin is kept against transient instability. With the model proposed in this thesis, it will be possible to load these lines close to their thermal limits. The transmission lines are allowed to carry usual ac along with dc superimposed on it.

Design of Capacitor Step-Down Regulated Power Supply Based on Current Conduction Angle Adjustable Mode

In this paper a capacitor step-down regulated power supply based on current conduction angle adjustable mode is proposed. The circuit of capacitor step-down regulated power supply has simple structure, low cost, output short circuit and less loss, it is widely used in driving power supply with small power. But the conventional capacitor step-down power supply has no voltage stabilizing, it cannot work between wide voltage ranges from 180V to 260V. This power can drive LED lamp group which power range is from 5W to 20W. It has less EMI, stable work, low cost and simple maintenance.

A Configurable Multi-Rail Power and I/O Pad Applied to Wafer-Scale Systems

We propose in this paper a novel configurable multi-power-rail pad that combines power supply support circuits and a digital input/output (I/O) buffers designed for a wafer-scale system. This wafer-scale platform includes a reconfigurable wafer-scale circuit, the WaferIC, comprising an alignment-insensitive surface that can be configured to interconnect any digital components manually deposited on its surface. The proposed multi-power-rail pad minimizes power losses and heat dissipation within the circuit. The pad that is fed from two distinct voltage sources providing power at 1.8 and 3.3 V has been implemented and tested. This pad has two merged configurable control loops that can select the power source. Merging takes place through shared transistors. This dual supply pad embeds a voltage regulator that achieves a fast response time of 21.1 ns and that can operate over a wide range of configurable regulated output voltage, from 500 mV up to 2.955 V. This regulator is capable of providing a maximum output current of 40 mA while needing only a very small quiescent current of 126 μA. The regulator's power supply noise rejection ranges from -25 down to -40 dB for frequencies ranging from 1 kHz up to 1 MHz. The embedded digital I/O pad shares a common output with the power distribution and can be configured from 0.5 up to 3.3 V for a maximum speed of 250 MHz.

Optimal Design of Energy-Saving Induction Cooker Power Controller Based on Fuzzy Technology

Application of Soft-switching technique and fuzzy control is discussed to optimize traditional induction cooker controller. Soft-switching technique is used to improve output efficiency of induction cooker. Switch voltage regulation by fuzzy control are used to adjust output power of induction cooker. Soft-switching inverter consists of resonant DC link and LC resonant network. Resonant DC link is used to realize ZVS, and resonant network is used to eliminate harmonics. Fuzzy control based on look-up table is adopted to adjust duty cycle of switch mode regulated power supply, which changes the DC supply voltage, so that amplitude of AC signal inverted by induction cooker is changed to adjust output power of induction cooker according to the requirement, , ensuring the operating temperature aligned with the target temperature.

Thermal characteristics and flow patterns of oscillating heat pipe with pulse heating

Abstract In this paper, a pulsed direct current regulated power supply instead of normal continuous power supply was applied to heat the oscillating heat pipe through transparent electrical heating film which was evenly coated on the evaporation section. Simultaneous visualization and temperature measurement experiments were performed to investigate the impact of pulse heating on the temperature difference between evaporation section and condensation section, temperature fluctuation and flow behaviors of oscillating heat pipe. The experimental results indicated that the temperature difference between the evaporation section and the condensation section under pulse heating mode is highly dependent on the pulse duration and heating power. Furthermore, it was found that the pulse duration and pulse interval play an important role on the oscillating period of the temperature. Under pulse heating, instantaneous formed large amplitude oscillation is observed due to a phenomenon termed as ‘injection–contraction’ phenomenon, which simultaneously reinforces both the sensible heat transfer and latent heat transfer. When heating power equals to or is larger than 90 W, pulse heating accelerates the liquid reflux to evaporation section as the heating is stopped during pulse interval. Under pulse heating mode, the regions corresponding to the safe operations of oscillation heat pipe can be also extended.

HYDROGEN PRODUCTION FROM GLYCEROL USING MICROBIAL ELECTROLYSIS CELL

Energy is an important component in the current scenario. Creating new technologies for improving the energy demand and supply balance is important. Microbial electrolysis cell is a developing technology to generate hydrogen which could save on the fossil fuels conventionally used as source of energy. In this study, the possibility was explored to use glycerol which is one of the by products from biodiesel plant as the substrate for hydrogen production. The microbial electrolysis cell consists of stainless steel as cathode and graphite plate as anode. Cationic exchange membrane (CMI 7000) was used for the exchange of hydrogen ions from anode chamber to cathode chamber. External voltage of 0.8 V was supplied to the microbial electrolysis cell using a regulated power supply. Pseudomonas bacteria were added along with the substrate. The hydrogen gas evolved was collected by the downward displacement of water. The gas was sampled and analyzed using gas chromatography. The concentration of hydrogen in the gas was found to be 50.3%.

Research on Coating Devices with Applied Technology in Magnetron Sputtering Regulated Switching Power Supply Design

Magnetron power supply is one of the most important components in coating devices in applied technology. Magnetron regulated power supply with high power and high efficiency is studied and designed on the basis of high-frequency switching power supply technology. The principle of the main circuit and control circuit design are introduced. A MATLAB simulating model is composed to study parameters and waveforms of the designed circuits. The hardware circuit and software program are designed based on simulation results. The adjustment and display of the output voltage and the output current of the power supply under different work modes are achieved with TMS320F2812 DSP system. Practical applications confirm that the designed power supply has good constant current control effect, high reliability and working stability.

The Design of AC Regulated Power Supply Based on PWM Chopping Series Compensation Technology

Area for the fast load variation, the power grid voltage fluctuations is very serious. In order to supply stable voltage for the small power user, a unipolar chopping compensation AC regulated power supply is designed based on bidirectional H PWM chopping bridge which can realize the bidirectional flow of energy when the voltage is boosted and step-down. It adopts voltage feedback control. The initial chopping duty ratio is determined by proportion regulation according to difference of the input voltage and the standard voltage; it can improve the voltage response speed. The initial duty ratio is corrected according to digital PID regulation based on the output voltage feedback, which ensures the stability of the output voltage. The STC12C5A62AD single chip is adopted for the regulated power supply that have 8 AD inputs and PWM output, it make the system structure simple. The 12.8 kHz sampling frequency and high precision voltage sampling technology ensures the precision of sampling. The 10 kHz frequency of the chopper reduces the harmonic component and it is easy to filter. Experimental results show that dynamic response speed of the regulated power supply is fast and precision of it is high. It has great practical value.