Five- and seven-phase conversion transformers

El-Kahel, M.; Olivier, G.; April, G.-E.; Guimaraes, C.A.M.

doi:10.1109/ccece.1995.526302

Cited by 4 publications

(9 citation statements)

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“…For example, two matrices T 1 , T 2 given in refs. [18,29] expressed by Equations ( 7) and ( 8) respectively, corresponding to three-tofive phase transformer winding based on both voltage and current conditions (K = 1 and θ = 0), where Equations ( 5) and ( 6) are not satisfied.…”

Section: Transformer Winding Determinationmentioning

confidence: 99%

“…However, in the case of Two-to-Three phase transformation performed by the Scott's connection with two separated limbs or three-limbed core, the winding determination based on the voltage balance condition is sufficient to satisfy automatically the current balance [14], it is evident that the Scott's connection can transform three-phase to two-phase, which used in ref. [18] to perform three-to-five phase transformation. Usually, the turn ratio matrix is not unique for a given K and θ, since the secondary winding elements are determined from m independent complex Equations (1), which allows choosing freely the elements of each phase.…”

Section: Winding Determination Based On Voltage Balance Conditionmentioning

confidence: 99%

“…Actually, there are few works in the literature, on three to m-phase transformers where m is a prime number, the most important of which are [18,19]. In these studies, the effect of non-satisfaction of the current balance condition on primary currents of three-to-five phase transformer has been explored, in three cases where the number of limbs of the magnetic core is different in each one.…”

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confidence: 99%

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Design and modelling of three‐to‐five phase three‐limbed transformer

Khelafi

Djebli

Touhami

et al. 2023

IET Electric Power Appl

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This study presents a design study and modelling of three‐to‐five phase transformer with three‐limb magnetic core. The basics of phase transformation windings are discussed. The purpose of such winding is to produce at the secondary a balanced multiphase voltage system, from multiphase primary of different number of phases, without unbalance in the primary and secondary under load conditions. In order to overcome the imbalance due to the dispositions of the winding coils on the magnetic core, simulations using aided computer design are performed. Furthermore, this study presents a model of a three‐to‐five phase three‐limbed transformer, which is suitable for modelling the behaviour of this transformer at no‐load, under load, and under unbalance load conditions. This study is conducted by simulation and experimental tests.

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Section: Transformer Winding Determinationmentioning

confidence: 99%

Section: Winding Determination Based On Voltage Balance Conditionmentioning

confidence: 99%

mentioning

confidence: 99%

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Design and modelling of three‐to‐five phase three‐limbed transformer

Khelafi

Djebli

Touhami

et al. 2023

IET Electric Power Appl

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“…MPRs are categorized according to the number of pulses and its output rectifier connection which can be either series, separated or parallel [7] . Apart from that, they can also be classified based on connections such as extended delta and double star [8] , [9] , zigzag [10] , [11] , [12] , reduced rating autotransformers and T-connections [13] , [14] , [15] . Phase shifting transformer is utilized to design the MPRs which includes splitting the supply into a number of outputs, each of which is phase-shifted to the others at a suitable angle to reduce harmonics.…”

Section: Introductionmentioning

confidence: 99%

Investigating the input power quality of multi-pulse AC-DC power converter fed induction motor drives

Nahin¹,

Nafis²,

Biswas³

et al. 2022

Heliyon

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“…An exception is [32], where a new type of transformer is presented, which is three-to-five-phase system. In [33] and [34], the au thors presented an interesting solution for three-to-five-phase conversion. At the end of [33], the authors briefly mention the seven-phase system; however, no study or analysis was done on three-to-seven-phase transformer.…”

Section: Introductionmentioning

confidence: 99%

Modified approach for harmonic reduction in three-phase to seven-phase using transformer winding connections

Kamarposhti

Hosseini²

2019

IJECE

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Three phase supply is available in the generating station or grid, were as seven phase supply is required for many industrial applications such as, aerospace, railway and automobile applications. There are different methods in which we can convert 3 to 7 phase using 24-Pulse Converter, Carrier Based PWM Technique, multilevel converter and Multiphase Transformer. The above said methods which are more complicated to design for higher ratings or a pure sine wave will not be obtained or harmonics will be more. For Multiphase power transmission system multiphase transformers are needed. In the multiphase power transmission and multiphase rectifier systems, the number of phase can be designed and developed in multiples of three. Therefore, the variable speed multiphase drive system considered in the literature are mostly of five, seven, nine, eleven, twelve, and fifteen phase. So, there is a need to design and develop special transformer which converts from 3 to 7 phase for different arrangement of input and output. Thus, with the proposed technique, a pure seven-phase sine-wave of fixed voltage/current and frequency is obtained, which can be used for RL load and motor testing purposes. Complete design and simulation of the proposed solution is presented. Analytical calculation and simulation results for RL load is presented in the paper. This model can be simulated by using Orcad simulation software and “SimPowerSystem” block sets of MATLAB/SIMULINK software.

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Five- and seven-phase conversion transformers

Cited by 4 publications

References 0 publications

Design and modelling of three‐to‐five phase three‐limbed transformer

Design and modelling of three‐to‐five phase three‐limbed transformer

Investigating the input power quality of multi-pulse AC-DC power converter fed induction motor drives

Modified approach for harmonic reduction in three-phase to seven-phase using transformer winding connections

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