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Dissertations / Theses on the topic 'Four leg three phase inverter'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Zhang, Min. "Investigation of switching schemes for three-phase four-leg voltage source inverters." Thesis, University of Newcastle upon Tyne, 2013. http://hdl.handle.net/10443/2319.

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Three-phase four-leg voltage source inverters (VSIs) are widely used in distributed power generation applications, three-phase UPS systems and fault-mode operation of a balanced three-phase system where the balanced three-phase voltage output is required when the loads are unbalanced. A three-dimensional space vector modulation (3-D SVM) switching scheme, which is proved to be compatible with modern DSP implementation for a four-leg VSI, has the advantage of higher DC link utilization, less harmonic contents and less switching losses compared with sinusoidal PWM. Therefore it is the first choi
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2

Demirkutlu, Eyyup. "Output Voltage Control Of A Four-leg Inverter Based Three-phase Ups By Means Of Stationary Frame Resonant Filter Banks." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608151/index.pdf.

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A method for high performance output voltage control of a four-leg inverter based three-phase transformerless UPS is proposed. Voltage control loop is employed and the method employs stationary frame resonant filter controllers for the fundamental and harmonic frequency components. A capacitor current feedback loop provides active damping and enhances the output voltage dynamic performance. The controller design and implementation details are given. Linear and nonlinear loads for balanced and unbalanced load operating conditions are considered. The steadystate and dynamic performance of the UP
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3

Žůrek, Tomáš. "Řízení trojfázového sinusového zdroje." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220914.

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This thesis deals with control of three phase inverter as three phase sinusoidal voltage source for UPS application. Thesis is split to two parts, teoretical and practical. Teoretical part deals with three phase inverter topology analysis according requirement of neutral line wire and possibilities of generating sinusoidal PWM in depend of topology. There are also analysed properties of contorled system and designed 3 regulation methods with simulations. Second part of thesis deals with realisation of sinusoidal power source with inverter borrowed by Elcom company. To inverter control is used
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4

Pinto, Lázaro Rubens Araújo. "Aplicação de controlador preditivo baseado em modelo (MPC) para sistema de geração distribuída constituído por inversor trifásico a quatro braços." Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/7853.

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Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2017-10-06T12:04:38Z No. of bitstreams: 2 Dissertação - Lázaro Rubens Araújo Pinto - 2017.pdf: 16272237 bytes, checksum: 9f3d1693d0282cbf28a35702c1a9cf17 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-10-06T12:04:51Z (GMT) No. of bitstreams: 2 Dissertação - Lázaro Rubens Araújo Pinto - 2017.pdf: 16272237 bytes, checksum: 9f3d1693d0282cbf28a35702c1a9cf17 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
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5

Ye, Zhihong. "Modeling and Control of Parallel Three-Phase PWM Converters." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/29476.

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This dissertation studies modeling and control issues of parallel three-phase pulse-width modulated (PWM) converters. The converters include three-phase boost rectifiers, voltage source inverters, buck rectifiers and current source inverters. The averaging of the parallel converters is performed based on a generic functional switching unit, which is called a phase leg in boost rectifiers and voltage source inverters, and a rail arm in buck rectifiers and current source inverters. Based on phase-leg and rail-arm averaging, the developed models are not only equivalent to the conventional three-p
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6

Dai, Min. "Control of power converters for distributed generation applications." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1124329850.

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7

Chen, Ching-Chen, and 陳慶臻. "A multicarrier PWM for three-phase four-leg inverter." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/xk4kbd.

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碩士<br>中華大學<br>電機工程學系<br>106<br>Three-phase three-leg inverter has an inherent common mode voltage (CMV) problem.Therefore, three-phase four-leg inverter is proposed to mitigate the CMV. This study discusses the characteristics of multicarrier pulse width modulation (PWM) for three-phase four-leg inverter. The analysis of sinusoidal PWM and space vector PWM with multicarrier is presented. The simulation results are utilized to validate the performances of the proposed multicarrier PWM scheme.
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8

Chang, Chen-Wei, and 張陳維. "A multicarrier PWM for unbalance three-phase four-leg inverter." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/p2a73t.

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碩士<br>中華大學<br>電機工程學系<br>106<br>The three-phase four-leg inverter is a system for mitigating common-mode voltages better than three-phase three-arm inverters. Therefore, for the common mode voltage (CMV), two techniques for three-phase four-arm inverters with multi-carrier pulse width modulation (PWM), sinusoidal PWM (SPWM) and space vector PWM (SVPWM) are proposed. To lower the CMV. This method is used to explore the impact on the system under load imbalance. Finally, the experimental and simulation software PSIM platform is used to analyze its system to verify the correctness of the proposed
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9

Sun, Wei-You, and 孫瑋佑. "The Control and Implementation of Three-Phase Four-Leg DC-to-AC Power Inverter." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/38861606677135525723.

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碩士<br>清雲科技大學<br>電機工程研究所<br>96<br>Generally,the traditional three-phase three-leg DC-to-AC power inverter are used widely with three phase balanced loads. But, when the three-phase loads are unbalanced, that three phase voltage outputs can not be symmetrical. In this paper presents a three-phase four-leg DC-to-AC power inverter can be supply a midpoint to three phase unbalanced loads.So the three-phase four-leg DC-to-AC power inverter outputs three phase symmetrical voltages. Using symmetrical model analysises three-phase four-leg DC-to-AC power inverter how it suppresses the unbalanced loads.
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10

Wei, Hsiao-tse, and 魏孝哲. "Post-Fault Control Strategy for Permanent-Magnet Synchronous Motor Drives with Six-Leg Three-Phase Inverter." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/h4hp5c.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>97<br>The thesis is concerned with the analysis and development of six-leg three-phase inverter for permanent-magnet synchronous motor(PMSM) drives. The power circuit uses six-leg three-phase inverter. Connecting each winding to two separately controlling legs yields three phase dc-ac converter. The inverter control strategy uses unipolar voltage switching method to raise the utilization factor of dc-link voltage. When a winding of three-phase PMSM breaks down, the associated load may have to be reduced to retain continuous running and increase the reliability of the
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11

Li, Nong-Yi, and 李穠義. "Design and Implementation of Modulated Predictive Current Controllers for Three-Phase Four-Leg Two-Level Inverters." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/j4uksd.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>107<br>This thesis proposes a novel type of modulated model-free predictive current control for three-phase four-arm two-level inverters. Compared to traditional techniques, the proposed method effectively improves current response at high frequencies by incorporating the optimal selection of two switching states based on simple calculation and then combines to the next switching state. This selection method effectively detects the optimal two modulated switching states in each sampling period. In addition, the improved control response at high frequency effect is i
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12

Chen, Chun-Hung, and 陳俊宏. "Study of a Novel Four-Switch Three-Phase Inverter." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/88070340764126702697.

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碩士<br>國立宜蘭大學<br>電機工程學系碩士班<br>96<br>A novel four-switch three-phase inverter is designed and implemented. A low cost four main switches and four auxiliary switches power converter configuration of the three-phase inverter is proposed. All main switches in the three-phase inverter operate at zero voltage switching (ZVS) turn on and turn off. Also, the auxiliary switches operate at zero current switching (ZCS) turn on and turn off. Moreover, the reduction in the number of main switches can also increase the reliability, since the control circuits and the auxiliary circuits are there by reduced to
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13

Lin, Li-Chiun, та 林力群. "D-Σ Digital Control Based Three-Phase Four-Wire Inverter". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/8tee2e.

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博士<br>國立中正大學<br>電機工程研究所<br>103<br>This dissertation presents a division-summation (D-Σ) digital control for three-phase four-wire bi-directional inverters with wide inductance variation. The bi-directional inverters can fulfill grid connection, rectification and uninterrupted power supply (UPS). When AC grid is operated normally and the inverter system is connected to the grid, the system will be operated in grid-connection (GC) mode, which includes four functions: unity power factor (PF), rectification with pow-er-factor correction (PFC), PF leading and PF lagging. On the contrary, when the i
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14

Lee, Chaoching, and 李昭慶. "Design and Implementation of Three-Phase Four-Wire Inverter with Load Impedance Estimation." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/09424151021618031902.

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碩士<br>國立中正大學<br>電機工程研究所<br>100<br>This thesis presents design and implementation of a three-phase four-wire inverter with load impedance estimation. The inverter can fulfill both grid-connected and stand-alone mode operations. In the stand-alone mode, the inverter with a neutral leg can generate sinusoidal output voltage for unbalanced load and nonlinear load. With the load impedance estimation, the controller can track the sinusoidal reference voltage accurately, and the inverter is allowed to have a wide inductance variation, reducing core loss and size significantly. The control law is deri
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15

Chiang, Tai-Chi, and 江泰祈. "Design of Power Flow Controllers Based on Two-Leg Four-Switch Three Phase Power Converter." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/26223247048890248097.

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碩士<br>國立聯合大學<br>電機工程學系碩士班<br>99<br>This thesis is focused on the design of low-cost high-performance power system controllers, in which static synchronous compensators (STATCOM) and static series synchronous compensators (SSSC) are two major design targets. The development of the proposed power flow controllers is mainly based on the hardware configuration of a 2-leg 4-switch (2L4S) three-phase inverter and issues regarding advantages and possible limitations in performing power flow regulation and voltage control functions are the main concerns. In this thesis, a number of switching techniqu
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16

Lin, Kai-Zhen, and 林楷晸. "Design and Implementation of a Multi-function Three-phase Four-wire Half-bridge Bidirectional Inverter." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5syh88.

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碩士<br>國立雲林科技大學<br>電機工程系<br>105<br>Due to the demand of power consumption is increasing, renewable energy technology is developed in every country. A three phase bidirectional structure is developed in this paper, which includes three modes: one is a grid connected inverter, another is a power factor corrector converter, and the last is an uninterruptible power system. Moreover, the paper also considers the situation when this system operates in grid connected mode but the sudden grid fault, the passive island detection method is developed to detect the island phenomenon. This method is able to
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17

Hsu, Chih-Wei, and 許志偉. "Design and Implementation of A Three-Phase Four-Wire Multi-Function Inverter with LLCL Filter." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/40974787757513704336.

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碩士<br>國立清華大學<br>電機工程學系<br>104<br>This thesis presents design and implementation of a three-phase four-wire inverter with LLCL output filter. To achieve higher applicability in the emerging development of dc micro-grid and renewable energy systems, the inverter is equipped with multiple functions, including grid-connection, rectification, dc-link voltage regulation and active power filtering (APF). In general, control strategies used in most multi-function systems tend to be complex, where each operation mode requires its own way of control. However, the division-summation (D-∑) digital control
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18

Huang, Hsu-Yun, and 黃勖昀. "Design and Implementation of Three-Phase Four-Wire Inverter with Load Impedance Estimation and Iterative-Learning Control." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/83173068641099534403.

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碩士<br>國立中正大學<br>電機工程研究所<br>101<br>This thesis presents design and implementation of a three-phase four-wire inverter with load impedance estimation and iterative-learning control. The inverter can operate at the grid-connected and stand-alone mode conditions. In the stand-alone mode, the inverter with a neutral leg can generate sinusoidal output voltage for unbalanced load and nonlinear load. With the load impedance estimation, the controller can track the sinusoidal reference voltage accurately, and the inverter has considered a wide inductance variation, reducing core size significantly. The
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19

Lee, Po Hung, та 李柏宏. "Design and Implementation of a 20 kVA D-Σ Digital Controlled Three-Phase Four-Wire Multi-Function Inverter System". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/5s7543.

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碩士<br>國立清華大學<br>電機工程學系<br>103<br>This thesis presents design and implementation of a 20 kVA division-summation (D-Σ) digital controlled three-phase four-wire multi-function inverter system. The in-verter can be operated in grid-connected or stand-alone mode to act as a renewa-ble-energy ac power-supply system. In the stand-alone mode, the control of this in-verter uses the D-Σ digital control law for voltage tracking which includes load im-pedance estimation and repetitive control, causing the inverter can stabilize sinusoidal output voltage for unbalanced load and nonlinear load. For the grid
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20

Chiu, Chi-Lun, and 邱啟倫. "Design and Implementation of Model-Free Predictive Current Controller for Four-Switch Three-Phase Inverter-Fed Synchronous Reluctance Motors." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/45034255736362108121.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>103<br>This thesis presents a novel predictive current control for four-switch three-phase inverter-fed synchronous reluctance motor drive systems. We not only develop a new strategy for four-switch three-phase inverter-fed synchronous reluctance motor drive systems, but also discuss the feasibility and correctness of this method so as to improve the ability of the current control of the motor drive system. Furthermore, we expect to meet the industrial requirements of low-cost drive system equipped with high-performance current control. Compared to the six-switch dr
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21

Peng, Chih-I., and 彭智義. "Design and Implementation of An Improved Predictive Current Controller for Four-Switch Three-Phase Inverter-Fed Synchronous Reluctance Motor Drive systems." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/d859f9.

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22

Ghoshal, Anirban. "Operation of Three Phase Four Wire Grid Connected VSI Under Non-Ideal Conditions." Thesis, 2013. http://etd.iisc.ernet.in/2005/3386.

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The necessity to incorporate renewable energy systems into existing electric power grid and need of efficient utilization of electrical energy are growing every day. A shunt connected Voltage Source Inverter(VSI) capable of bidirectional power flow and fast control has become one of the building block to address such requirements. However with growing number of grid connected VSI, new requirements related to harmonic injection, higher overall efficiency and better performances during short term grid disturbances have emerged as challenges. For this purpose a grid connected three phase four wir
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