Design Of Power Supply Research Articles

Modeling, Simulation and Design of an AC-DC Power Supply

Modeling, Simulation and Design of an AC-DC Power Supply

Design and Development of High-Voltage High-Pulse Power Supply Using FPGA for Dynamic Impedance Matching

Design and Development of High-Voltage High-Pulse Power Supply Using FPGA for Dynamic Impedance Matching

Design and implementation of a temperature-compensated corrector magnet power supply for the Taiwan Photon Source

The Taiwan Photon Source (TPS) is a widely recognised 3 GeV synchrotron light source. It has demonstrated exceptional performance in average beam downtime and meeting international standards over its successful ten-year operation. Regular equipment updates are conducted for all subsystems to ensure continuous improvement and maintain an optimal research facility environment. This study focuses on designing and implementing a temperature-compensated corrector magnet power supply for the TPS. The power supply incorporates a high-bandwidth, compact, cost-effective, bipolar, and highly precise shunt resistor as the current feedback component. A temperature control copper box and temperature compensation circuit are employed to improve the thermal equilibrium time of the output current. A laboratory-developed TPS-corrected magnet power supply with temperature compensation control has been successfully developed through these measures. The prototype exhibits a maximum output current of 10 A and operates at a voltage of 40 V. Metal-oxide-semiconductor field-effect transistors (MOSFETs) are utilised as the power switch in a full-bridge (H-bridge) configuration with a driving frequency of 40 kHz. The output current ripple is effectively maintained at 100 μA for a 10 A output, and the stabilisation time is achieved within 5 minutes. The control loop design of the prototype has been verified to achieve fast and stable output current performance. The completed prototype demonstrated a -3 dB bandwidth of 2.57 kHz when tested with an input reference signal of 0.1 V. Finally, a hardware prototype circuit was constructed in the power supply laboratory, featuring an input voltage of 48 V, an output current of 10 A, and a maximum power capacity of 400 W.

Supercapacitors Based Power Supply Design for Toroidal Field Coil of Upgrade Damavand Tokamak

در این مقاله سیستم تأمین انرژی و تخلیه جریان در سیم‌­پیچ چنبره‌ای توکامک دماوند به منظور افزایش زمان میدان‌های مغناطیسی با هدف افزایش زمان ماندگاری پلاسما، طراحی و شبیه‌سازی شده است. در حال حاضر در این توکامک جریان سیم­‌پیچ چنبره‌ای دارای نیم سیکل سینوسی با مدت زمان ms 100 و پیک جریان kA 12 است که میدان مغناطیس تقریباً T 1/1 در مرکز چنبره تولید می‌کند و ناحیه تخت آن در حدود ms 20 می‌باشد که برای تشکیل و محصورسازی پلاسما استفاده می‌گردد. با هدف ارتقاء توکامک دماوند به منظور افزایش مدت زمان ماندگاری پلاسما به ms 200، ضروری است که سیستم‌های تأمین انرژی و کنترل مربوط به جریان سیم‌­پیچ‌های قطبی و چنبره‌ای جدید طراحی و ارتقاء یابد. برای رسیدن به هدف مذکور، در این مقاله سیستم تأمین انرژی اصلی بر پایه منابع انرژی ذخیره‌ساز ابر خازن با ظرفیت F21، ولتاژ تحمل V900 و چیدمان 7 شاخه سری، 8 شاخه موازی طراحی شده است. هم‌چنین جهت تأمین و تثبیت جریان سیم‌پیچ چنبره‌ای، مبدل چاپر با 7 ماژول موازی به همراه سیستم کنترل حلقه بسته با کنترل‌کننده هیسترزیس طراحی و شبیه‌سازی شده است. سیستم کلی قابیلت تأمین و تثبیت میدان مغناطیسی از محدوده 7/0 تا 2/1 تسلا با ریپل کم‌تر از %2/0 و مدت زمان ms 200 برای ناحیه تخت دارد. هم‌چنین سیستم شارژ بانک ابر خازنی بر اساس مبدل یکسوساز 12 پالسه و مبدل باک با روش جریان ثابت، طراحی و شبیه‌سازی شده است که نتایج مطلوبی را حاصل کرده است.

A Research on the Load Calculation Method in Designing the Traction Power Supply for Integrated Subway – MCR

This paper presents a load calculation method in the design of a traction power supply for integrated subways. Integrated subways have a large carrying capacity and the ability to balance between meeting travel needs and satisfying conditions such as high quality service, cost optimization for railway infrastructure construction, and installation of traction power systems. In an integrated model, the calculation of the traction power supply design is much more complicated than in other stand-alone models. This paper presents the research results on the load calculation method of a traction power supply for the operation of the system. The results show the feasibility of the method when applied to an asynchronous loading system and met the standards of IEEE P1653.2, EN 50328, and IEC 60146-1 in the design of the power supply for permitted overloads according to class VI.

The Design Method of Traction Power Supplies in Integrated Metro Systems

Integrated subway systems have emerged as a new trend that provides the highest quality service at the lowest investment cost by combining the advantages of the two largest passenger transport capabilities during peak hours. Under the integrated model, designing the traction power supply is much more complex than for other independent systems. This article presents the results of a study on the method of calculating the design load of the power supply for the transport operation of the system. Matlab R2017b/Railway Systems is a reliable software for simulating and analyzing some necessary data, and the research results show the feasibility of the method when applied to the case of asynchronous load on the system. The results meet the power supply design standards according to IEEE P1653.2, EN 50328, and IEC 60146-1 overload allowances for class VI, and voltage standards according to EN 50163, UIC 600, and IEC 60850.

Load model and parameter measurement method of DBD for power supply design

Plasma is widely used in sterilization and disinfection, environmental treatment, and material surface modification. At present, the DBD load equivalent circuit model used in the design of dielectric barrier discharge (DBD) low-temperature plasma generator power supply mainly includes the nonlinear clamping model and linear resistance capacitance model, which have advantages and disadvantages in the research and application of DBD load. This paper focuses on the modeling and parameter acquisition method of the RC parallel DBD load linear model, adds measurement capacitance to the discharge load loop, and obtains RC parallel equivalent model parameters by Q-V and I-V Lissajous-Figure analysis. After the experimental data is processed, the simulation circuit model is built by MATLAB/SIMULINK, and the experimental results are compared with the simulation calculation results. They verify the feasibility of the DBD load parameter measurement scheme and comprehensively demonstrate that the DBD load linear resistance capacitance model has important guiding significance in the design of the DBD power supply.

Parallel Current-sharing Design of Mine Explosion-proof Lithium-ion Battery Power Supply

When the output of explosion-proof lithium power supply is used in parallel, there exists the problem of non-uniform current between power sources, so a digital current-sharing strategy and module are designed. The digital current-sharing module uses the current-sharing MCU unit as the current regulating component to monitor the front-stage current and post-stage voltage, current and their feedback values of the power supply power circuit in real time. At the same time, the current compensation values are exchanged through the real-time communication bus, and the current-sharing modules of each power supply balance the current by adjusting the output current. The experimental results show that the problem of parallel current sharing of explosion-proof lithium power supply is solved effectively.

Medium-Voltage Isolated Auxiliary Power Supply Design for High Insulation Capability, Ultra-Low Coupling Capacitance, and Small Size

To fully utilize the benefits of MV SiC-based converter and achieve high power density, the isolated auxiliary power supply (IAPS) needs to be as small as possible. However, the high insulation and low coupling capacitance requirements, considering the high voltage and high dv/dt, are constraints of size reduction. This paper proposes a MV IAPS design for high insulation capability, ultra-low coupling capacitance, and small size. The topology selection, efficiency, load regulation, coupling capacitance, and size reduction considerations are discussed. A 2.5 W MV IAPS is designed and built for a 10 kV SiC MOSFET-based 13.8 kV/100 kW three-phase converter, achieving a partial discharge inception voltage of higher than 15 kV RMS, ultra-low coupling capacitance of 1.03 pF, and smaller size than that of the commercial products as well as the state-of-art research prototypes. Experimental results of partial discharge (PD) test, 10 kV SiC MOSFET-based half-bridge test, and 13.8 kV/100 kVA three-phase converter full rating test are conducted for design validation.

Need Based Design and Topology of Power Supply for Industrial Instruments

Abstract: Process control instruments plays decisive role in regulation and monitoring like control actions which requires efficient circuit analysis and different input and output power supplies to make it connectable in panels or used separately. This paper gives a comprehensive study of power supply used in instruments, based on power electronics principle used to improve circuit performance. Furthermore, it also includes analysis for energy conversion, switching devices, control methods, conduction modes and protection mechanism to make the supply efficient. Supply topologies i.e., Linear& Switched Mode Power supply are used as per the requirement of instruments. Both the supplies include different challenges and solutions to overcome losses and make the supply efficient. The analysis includes various parameters like voltage, current, power loss, waveform, efficiency, switching, feed-back and ringing. These parameters affect the whole supply if problem occurs in any of them.

Explosion characteristic of CH4–H2-Air mixtures vented by encapsulated large-scale Li-ion battery under thermal runaway

Explosion-proof diesel-powered vehicles are the main auxiliary transport vehicles in underground coal mines, although many of these have been replaced by battery electric vehicles (BEVs) nowadays. The explosion-proof structure and performance of the power supply of the BEVs should meet the IEC 60079 standard, however, and the explosion-proof cavity where the batteries are placed should be able to withstand a static pressure of not less than 1.5 MPa. In this paper, a nail penetration experiment is carried out on an encapsulated lithium-ion battery (LIB) pack under an atmosphere consisting of air, 9.5% methane, and 12.5% mixed combustible gas, and the temperature and the pressure data of the thermal runaway LIBs in the explosion-proof tank are comprehensively analysed. Moreover, the ignition explosion test of the gas released by thermal runaway of LIBs in different environments is conducted. Finally, the explosion process is simulated by the chemical reaction kinetics model in Ansys Fluent. The experimental and simulation results can guide the structural design of the explosion-proof tank of the power supply in extreme working environments, and provide an important reference for explosion-proof protection design and overall integrated safety design of LIB power supplies for explosive special environments.

Design of a Takagi–Sugeno Fuzzy Exact Modeling of a Buck–Boost Converter

DC–DC converters are used in many power electronics applications, such as switching power supply design, photovoltaic, power management systems, and electric and hybrid vehicles. Traditionally, DC–DC converters are linearly modeled using a typical operating point for their control design. Some recent works use nonlinear models for DC–DC converters, due to the inherent nonlinearity of the switching process. In this sense, a standout modeling technique is the Takagi–Sugeno fuzzy exact method due to its ability to represent nonlinear systems over the entire operating range. It is more faithful to system behavior modeling, and allows a nonlinear closed-loop control design. The use of nonlinear models allows the testing of controllers obtained by linear methods to operate outside their linearization point, corroborating with robust controllers for specific applications. This work aims to perform the exact fuzzy Takagi–Sugeno modeling of a buck–boost converter with non-ideal components, and to design a discrete proportional–integral–derivative (PID) controller from the pole cancellation technique, obtained linearly, to test the controller at different operating points. The PID control ensured a satisfactory result compared with the stationary value of the different operating points, but it did not reach the desired transient response. Since the proposed model closely represents the operation of the buck–boost converter by considering the components’ non-idealities, other control techniques that consider the system’s nonlinearities can be applied and optimized later.

Оптимизация размещения трансформаторных подстанций в городских микрорайонах с использованием генетического алгоритма и алгоритмов трассировки ЛЭП на карте

To define the placement of electric substations when designing power supply schemes in urban neighborhood is a challenging task since it is necessary to consider spatial restrictions when choosing routes for electric power lines. Thus, the selection of the substation distribution is usually limited by comparison of several variants. In the scientific literature, problems of optimization are usually considered without taking into account real environmental restrictions for the electric power transmission lines. And it significantly reduces the adequacy of the models used. Thus, the study of the possibilities to use both combinatorial optimization methods and the construction of minimum cost routes in the GIS environment to select the optimal layout of electrical substations when designing power supply schemes for urban neighborhood is relevant. The methods to determine the shortest paths on the graphs and the genetic algorithm search are used for the research. The map of the electric lines of Ivanovo city has been used as base data for calculation. A new method has been developed to determine the optimal number and placement of transformer substations to power a lot of buildings on the digital city map. A wave algorithm of cost surfaces is used to estimate the cost of laying cable electric power transmission lines from the consumer to any location of the transformer substation. A genetic algorithm is used to select the network structure. The research results have confirmed the possibility to determine the best transformer substation distribution using GIS with given spatial restrictions.

Design of Digital Linear Power Supply with Low Current Ripple

Design of Digital Linear Power Supply with Low Current Ripple

2-kW plasma power supply design with small frequency fluctuations

2-kW plasma power supply design with small frequency fluctuations

Large-capacity AC superimposed DC power supply for the degradation evaluation of DC-link capacitors

The DC-link capacitor, whose operating voltage is a periodic irregular waveform, is a key device in the converter. A large-capacity DC/AC superimposed experimental power supply above 100 kVA is an important piece of equipment that must be used in the aging research of DC-link capacitors. The irregular periodic operating voltage of the DC support capacitor is equivalent in the form of DC voltage superimposed with multiple harmonics based on the Fast Fourier transform analysis. The power supply is mainly divided into four parts: an AC module, a DC module, a protection module, and an isolation component. The composited harmonics are output by the IGBT (Insulated Gate Bipolar Transistor) inverter of the AC module. The soft start method is applied to the AC module in order to ensure the long-term reliable operation of the power supply. The kV-level high-voltage is output by four inverter units connected in series. The amplitude and phase control of harmonic decomposition is adopted, and the inverter is controlled by Sinusoidal Pulse Width Modulation. The output voltage of the power supply is close to the operating voltage of the capacitor. Based on the designed power supply, the degradation experiment was carried out. The temperature rise and aging characteristics of DC-link capacitors under different AC/DC ratios were studied.

Optimization design of Three-phase balanced power supply for vehicle mobile power

This paper analyzed the harm of three-phase unbalanced power supply of vehicle mobile power supply to generator set electrical equipment and communication system, and the cause of the harm is analyzed. The three-phase balance control box is designed by adopting the design concept of “three input one output” and “rectifier inverter”. Through the comparison of the experimental data, the feasibility of the three-phase balance control box for the three-phase balance adjustment of the external power supply of the vehicle mobile power supply is verified, so as to achieves the optimization of the three-phase balance power supply and improves the reliability and safety of the external power supply of the vehicle mobile power supply.

A Compact Auxiliary Power Supply Design for a Medium Frequency Solid State Transformer

The design of auxiliary power supply (APS) in solid-state transformers (SSTs) is quite challenging. To minimize the isolation requirement, this APS is usually powered by dc-link capacitors. However, it poses voltage unbalance issues when the main converter is not in operation. To address this problem, a compact and cost-effective APS design is proposed, which utilizes the isolation structure of main medium-frequency transformers (MFTs). The proposed APS system also provides half-duplex communication, which replaces the costly optical fiber system. The interference between main and auxiliary power transfer links has been significantly reduced by the decoupled transformer design and the dual-band scheme for inductor-inductor-capacitor (LLC) and inductor-capacitor-inductor-capacitor (LCLC) converters. In addition, a new startup strategy with a low standby power is applied to this APS system. A 3.2-kW SST prototype with a peak efficiency of 97.9% has been built, whose APS is 6 W. The experimental results verify the feasibility and performance of the proposed techniques.

Повышение качества электроэнергии в системах электроснабжения прокатных станов с использованием преобразователей частоты с активными выпрямителями за счет применения специализированных пассивных фильтров

In recent years, the frequency converters (FC) with active rectifiers (AR) have become widespread due to their advantages. The advantages are the possibility of energy recovery in braking modes of electric drive and support of the set value of power factor at the input of AR. At the same time these converters have a significant disadvantage, that is the deterioration of voltage quality in the in-plant 6–35 kV power distribution network due to the imposition of high-frequency harmonics of the input voltage and current of AR on the resonant area of the supply network frequency response. This disadvantage can be eliminated by using special passive filters in the in-plant power networks. They ensure the shift of the main resonance of currents to a zone free from high-frequency harmonics of the FC with AR. It makes possible to reduce the harmonic distortion coefficient in the voltage sections of the main stepdown substation (MSS) of the enterprise. Processing of experimental data is carried out in the Matlab mathematical package with the Simulink application. Using income data of functioning metallurgical complex CherMK of PJSC “Severstal”, the authors carried out the analysis of voltage quality of 10 kV network using specialized passive filters and without them. The article presents the results of the study of the effectiveness of the use of specialized passive filters in the in-plant power supply system of the rolling complex operating at the CherMK of PJSC “Severstal”. The reasons of the deterioration of the voltage quality in the 10 kV distribution network are studied, and as a result, operational breakdown of the modes of sensitive electrical receivers. A complex mathematical model of the 10 kV network has been developed to study the way to improve the harmonic composition of voltage due to installation of specialized passive filters. This filter allows you to adjust the frequency characteristics of the 10 kV network, shift it to an area free of high-frequency harmonics generated by modern frequency converters with active rectifiers. Thus, the resonance of currents and voltages in 10 kV sections is eliminated. As a result, a significant improvement in the shape of the line voltage and a decrease in the harmonic distortion coefficient of voltage THDU = 75,2–91,2 % to values THDU = 0,49–1,4 % is observed. The main result of the research is the recommendation to use a specialized passive filter to eliminate the negative impact of the harmonic component of the current resonance. The research results can be used to design power supply systems of metallurgical enterprises that have powerful electric drives with active rectifiers.

Fault logic circuit design of switching power supply based on soft reference circuit module

The basic idea of the circuit fault diagnosis method based on fault logic is to establish a computer expert database system first, connect the computer to the GPIB interface card, and then connect each intelligent instrument through the GPIB standard bus. Through the connection of the tested object adapter and the tested object, a circuit fault expert diagnosis and test platform are formed. Based on the traditional fault simulation model, this paper improves the fault logic circuit of switching power supply, designs the system model of fault simulation, deals with the logic structure and circuit hierarchy respectively, and produces the final output through the logic gate circuit by comparing the results of the fault logic circuit and the fault-free logic circuit. The designed switching power supply fault logic circuit works in the switching state, which has the characteristics of low loss and high energy conversion efficiency. Through the simulation analysis, the output is connected to the comparator, which plays the role of the whole wave. The simulation results are in line with the parameter indicators. The functional test results of the chip show that the function of the module is basically normal, which has practical application value and good portability and can be used as a reference for similar electrical designs.