Power Supply
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2021 ◽  
Vol 11 (21) ◽  
pp. 9874
Xinxing Xiang ◽  
An Luo ◽  
Yan Li ◽  
Yandong Chen ◽  
Aiwu Li ◽  

A reconstructed topology with fault diagnosis and fault-tolerant control strategy of the two-phase quadrature power supply of an electromagnetic stirring system are proposed to improve the reliability of the system. First, if the back stage inverter is faulty, the topology will be reconstructed after the diagnosed fault. The reconstructed topology with the fault diagnosis can be applied twice. Additionally, a fault pulse reset method is proposed to form a fault-tolerant control strategy, for which the high-reliability electromagnetic stirring power supply does not need to switch the control algorithm before and after the failure. The reliability of the electromagnetic stirring power supply is improved greatly. Finally, simulations and experiments verify the correctness of the electromagnetic stirring power supply fault diagnosis algorithm, reconstruction topology, and its fault-tolerant control strategy proposed in this paper.

José Manoel Balthazar ◽  
Paulo Batista Gonçalves ◽  
Angelo Marcelo Tusset ◽  
Grzegorz Litak ◽  
Átila Madureira Bueno ◽  

2021 ◽  
Vol 162 ◽  
pp. 107714
Weijian Qin ◽  
Zhichao Shi ◽  
Wenhua Li ◽  
Kaiwen Li ◽  
Tao Zhang ◽  

2021 ◽  
Atif Iqbal ◽  
Marif Daula

In this project, a new system for power supply for remote areas has been proposed. In the proposed system, solar PV based system with battery storage for stand-along application has been discussed. In addition, the use of a multilevel inverter and high-gain DC/DC converter has been proposed. The proposed multilevel inverter generates a nine-level output voltage waveform with quadruple voltage gain. The proposed DC/DC converter is based on the concept of a switched-inductor with voltage lift switched-capacitor and has been verified for a voltage gain of 20. The experimental results confirmation the satisfactory performance for stand-alone applications of the proposed converters.

А.Н. Юров ◽  
Д.В. Цымбал

Предложена разработка цифрового макета изделия, который представляет собой компонент ЭВМ - импульсный блок питания. Производится анализ предполагаемых компонентов персонального компьютера, которые будут установлены в систему. При необходимости есть возможность выбора с добавлением новых компонентов в системный блок ЭВМ. После определения заданных компонентов ПК производится расчет мощности, которая нужна для получения стабильной работы системы в целом. По произведенным расчетам выполняется 3D-моделирование блока питания с разъемами для подключения материнской платы, видеокарты, а также прочих устройств, в том числе и накопителей информации. В работе исследованы вопросы по применению методов линейного программирования для решения поставленных задач в соответствии с исходными данными, а также подходы по получению 3D-модели источника питания с построенными трассами до разъемов подключения устройств и компонентов персонального компьютера. Кроме того, подготовлено программное обеспечение, в котором визуально представлен процесс построения сборочной модели БП согласно произведенным расчетам We propose the development of a digital model of the product, which is a computer component - a pulsed power supply. We carried out the analysis of the expected components of the personal computer that will be installed in the system. If necessary, there is a choice with the addition of new components to the system unit of the computer. After determining the specified PC components, the power is calculated, which is needed to obtain stable operation of the system as a whole. According to the calculations made, 3D-modeling of the power supply unit with connectors for connecting the motherboard, video card, as well as other devices, including information storage devices, is performed. The paper investigates the issues of using linear programming methods for solving the assigned tasks in accordance with the initial data, as well as approaches to obtaining a 3D model of a power supply with constructed routes to the connectors for connecting devices and components of a personal computer. In addition, we prepared the software, in which the process of building an assembly model of a power supply unit is visually presented according to the calculations

Alexandra Vasilyevna Yashchenko

The article examines the process of formation of the power supply industry in the 2000s using the example of a separate region. The market transformation of RAO UES was carried out under the slogan of increasing the efficiency and reliability of interaction between the economy and the energy sector. However, in practice, the creation of the energy market faced many problems, the specifics of the “special product” electricity, network problems, institutional and other problems. On the example of the Altai Territory, the genesis of the territorial power supply system is shown within the framework of the general concept of market reform of the electric power industry. On the basis of real data of the supplier of last resort and the real consumer of electricity and capacity, a retrospective of the relationship of these entities in practice is shown. The dynamics of the average price for electricity is calculated and its quite significant growth is shown for the entire post-reform period of observations.

Long Liu ◽  
Linan Tian ◽  
Ning Ding ◽  
Weimin Guo ◽  
Na Xu ◽  

2021 ◽  
Vol 172 ◽  
pp. 112899
Zongqiu Gao ◽  
Jian Zhang ◽  
Fei Guo ◽  
Yu Zhou ◽  
Rui Guan ◽  

Aerospace ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 304
Dong-Kyu Lee

The magnetic suspension and balance system (MSBS) uses magnetic force and moment to precisely control the movement of the test object located at the center of the test section without mechanical contact, and at the same time measure the external force acting on the test object. If such an MSBS is installed around the test section of the wind tunnel so that the position and attitude angle of the test object follow the harmonic function, various vibration tests can be performed on structures subjected to aerodynamic loads without the influence of the mechanical support. Because the control force and moment in the MSBS is generated by a number of electromagnets located around the test section, it is necessary to apply the adaptive control algorithm to the position and attitude control system so that the experiment can be carried out stably despite the sudden performance change of each electromagnet and electric power supply. In this study, a fault-tolerant position and attitude angle control system was designed through an adaptive control algorithm, and the effectiveness was verified through simulation under the condition that the electric power supply of MSBS failed.

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