Three-Phase to Seven-Phase Power Converting Transformer

Moinoddin, Shaikh; Iqbal, Atif; Abu‐Rub, Haitham; Khan, M. Rizwan; Ahmed, Syed Moied

doi:10.1109/tec.2012.2201483

Cited by 37 publications

(28 citation statements)

References 32 publications

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“…The simplest solution is the design of three-phase to n-phase IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS transformers, such as for example three-phase to five-phase [3,4] or three-phase to seven-phase [5] transformer. However, the usefulness of such transformers is limited and they are only a viable solution for laboratory testing of multiphase machines under sinusoidal supply conditions.…”

Section: Multiphase Power Supply Options and Their Controlmentioning

confidence: 99%

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Advances in Converter Control and Innovative Exploitation of Additional Degrees of Freedom for Multiphase Machines

Levi

2016

IEEE Trans. Ind. Electron.

563

238

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AbstractMultiphase variable-speed drives and generation systems (systems with more than three phases) have become one of the mainstream research areas during the last decade. The main driving forces are the specific applications, predominantly related to the green agenda, such as electric and hybrid electric vehicles, locomotive traction, ship propulsion, 'more-electric' aircraft, remote offshore wind farms for electric energy generation, and general high-power industrial applications. As a result, produced body of significant work is substantial, making it impossible to review all the major developments in a single paper. This paper therefore surveys the recent progress in two specific areas associated with multiphase systems, namely power electronic supply control and innovative ways of using the additional degrees of freedom in multiphase machines for various nontraditional purposes.Index TermsMultiphase variable-speed drives, ac-ac converters, inverters, PWM, multiphase power electronics, integrated on-board battery chargers.

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Section: Multiphase Power Supply Options and Their Controlmentioning

confidence: 99%

“…Instead, they oscillate along axes passing through the origin. The rest of the allowed 3 5 switching states result in space vectors with elliptical paths. The modulation uses large vectors only or large and medium space vectors, following the reasoning adopted for space vector modulation of five-phase VSIs.…”

Section: E Control Of Multiphase Ac-ac Convertersmentioning

confidence: 99%

Advances in Converter Control and Innovative Exploitation of Additional Degrees of Freedom for Multiphase Machines

Levi

2016

IEEE Trans. Ind. Electron.

563

238

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“…За последнюю четверть века резко возросло количество публикаций [1,6,[9][10][11], посвященных многофазным системам передачи электроэнергии, что связано, в первую очередь, с проблемами улучшения гармонического состава напряжения на выходе полупроводниковых статических преобразователей и модернизации линий электропередач (ЛЭП) сверхвысокого напряжения. Традиционно основным резервом улучшения технико-экономических показателей ЛЭП переменного тока и увеличение передаваемой мощности являлось повышение напряжения, что привело к передаче электроэнергии напряжением порядка 1150 кВ, например, ЛЭП Экибастуз -Кокчетав -Кустанай -Челябинск.…”

Section: постановка проблемыunclassified

“…В связи с этим и с прогнозируемым ростом потребления электроэнергии повысился интерес к альтернативным способам передачи электроэнергии, например многофазным ЛЭП. Так, согласно [10], шестифазная ЛЭП может обеспечить такую же передачу мощности с более низкими напряжением и уровнем помех линии, а также меньшими размерами опор по сравнению со стандартной двухцепной трехфазной линией. Кроме того, согласно [4], отечественные предприятия «Донецкий электротехнический завод» и «Луганский энергозавод» с 2012 года наладили серийное производство шестифазных двигателей.…”

Section: постановка проблемыunclassified

Mass and cost indications of transformers with the rotating magnetic field for converting a number of phases

Palchykov¹

2014

Collection of Scientific Publications NUS

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The efficiency of the conversion of a number of phases by transformers with the rotating magnetic field on the basis of the induction radial machine with the fixed radial rotor is considered. The aim of the research is to develop mathematical models of the mass and the cost of electromagnetic systems of transformers with the rotating magnetic field with different coefficients of the voltage transformation on the basis of objective functions with respect to the relative indications of the technical level and relative geometric controlled variables. The analytical expressions for the determination of mass and cost characteristics are obtained, and the possibilities of the optimization of the geometric dimensions of electromagnetic systems of transformers for converting a number of phases with different coefficients of the voltage transformation are shown. The influence of the transformation coefficient at the optimal geometry of the magnetic core is studied, and the invariance ratio of a number of phases of the primary and secondary windings on the mass and the cost of electromechanical converters of the number of phases of equivalent power is proved. The results of the research can be applied to the design and the selection of rational compromise of the geometric relationships of the electromagnetic systems of transformers with the rotating magnetic field as units, and series, unified by a single transverse geometry. Keywords: transformer for converting the number of phases; rotating magnetic field; mass and cost indications. Аннотация. На основе метода относительных показателей технического уровня оптимизации статических индукционных устройств получены аналитические выражения для определения характеристик массы и стоимости, а также показана возможность оптимизации геометрических соотношений электромагнитных систем трансформаторов с вращающимся магнитным полем, с различными коэффициентами трансформации по напряжению. Ключевые слова: трансформатор для преобразования числа фаз; вращающееся магнитное поле; показатели массы и стоимости. Анотація. На основі методу відносних показників технічного рівня оптимізації статичних індукційних пристроїв отримано аналітичні вирази визначення масовартісних характеристик, а також показано можливість оптимізації геометричних співвідношень електромагнітних систем трансформаторів з обертовим магнітним полем з різними коефіцієнтами трансформації за напругою. Ключові слова: трансформатор для перетворення числа фаз; обертове магнітне поле; показники маси і вартості. © О. О. Пальчиков Надійшла до редколегії 18.07.2014 Статтю рекомендує до друку член редколегії ЗНП НУК д-р техн. наук, проф. А. А. Ставинський

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“…Multiphase (more than three-phase) supply is needed for testing of multiphase motors for their parameter determination and performance evaluation. Phase number five and seven is elaborated [16,17]. Special transformer connections are used with fractional turn ratios to obtain five and seven-phases at the output while input remains three-phase.…”

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confidence: 99%

Systematic Implementation of Multi-Phase Power Supply (Three to Six) Conversion System

et al. 2019

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Multiphase (more than three) power system has gained popularity due to their inherent advantages when compared to three-phase counterpart. Multiphase power supply is extensively used in AC/DC multi-pulse converters, especially supply with multiple of three-phases. AC/DC converter with multi-pulse input is a popular solution to reduce the ripple in the DC output. Single-phase and three-phase transformers and phase transformation from single to multiphase are employed in variable speed drives application to feed the multi-cell H-Bridge converters and multi-pulse AC-DC converters. Six-phase system is extensively discussed in the literature for numerous applications ranging from variable speed drives to multiphase wind energy generation system. This paper shows the systematic phase transformation technique from three-phase to six-phase (both symmetrical and asymmetrical) for both understanding and teaching purposes. Such an approach could help students understand a promising advanced concept in their undergraduate courses. When phase difference between the two consecutive phases of six phases has a phase difference of 60, it is called a symmetrical six-phase system; while an asymmetrical or quasi, six-phase has two set of three-phase with a phase shift of 30 between the two sets. Simulation and experimental results are also presented.

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Three-Phase to Seven-Phase Power Converting Transformer

Cited by 37 publications

References 32 publications

Advances in Converter Control and Innovative Exploitation of Additional Degrees of Freedom for Multiphase Machines

Advances in Converter Control and Innovative Exploitation of Additional Degrees of Freedom for Multiphase Machines

Mass and cost indications of transformers with the rotating magnetic field for converting a number of phases

Systematic Implementation of Multi-Phase Power Supply (Three to Six) Conversion System

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