Analysis on magnetic flux density and core loss for hexagonal and butt-lap core joint transformers

isa, maziah md; Kadir, Mohd Zainal Abidin Ab; Gomes, Chandima; Azis, Norhafiz; Izadi, Mahdi; Alyozbaky, Omar Sh.

doi:10.1109/spec.2016.7846227

Cited by 9 publications

(6 citation statements)

References 23 publications

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“…[14][15][16] Several investigators have analyzed the effects of change on the geometry of the joints in terms of loss profiles. [17][18][19][20] The study discussed in Haidar and Al-Dabbagh 17 proposed several T-joint angles, such as 23°, 45°, 60°, and 90°and compared the behaviors of different transformers with respect to the quantitative analysis of flux distribution and core losses. However, several investigations have shown that joint loss still holds the attention of researchers.…”

Section: Joint Issue In the Core Of The Three-phase Transformermentioning

confidence: 99%

A new approach of core structure model for 3-phase distribution transformer

Alyozbaky

Kadir

Izadi

et al. 2018

Int Trans Electr Energ Syst

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Summary Reducing the losses of 3‐phase transformers is still considered a significant target by many transformer designers and manufacturers. Core joint design is one of the factors related to the losses. In previous studies, core losses and flux density distribution motivated researchers to design appropriate T‐joints. However, the variation of load and thermal profiles are the most important factors related to the losses in transformers. This study proposed a new T‐joint configuration for the core of the 3‐phase transformer. The proposed model was built after considering the variation of load and thermal profiles. Results were compared with those of conventional T‐joint designs, such as butt‐lap and 45° mitered designs, that are currently used. The no‐load losses of the proposed model were reduced by more than 6.8% and 10% compared with those of the butt‐lap and mitered T‐joint designs, respectively. Furthermore, the total losses, the hot spot temperature of the core, and the oil temperature decreased significantly. The proposed model contributes to the literature on new T‐joint designs for improving transformer performance.

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Section: Joint Issue In the Core Of The Three-phase Transformermentioning

confidence: 99%

A new approach of core structure model for 3-phase distribution transformer

Alyozbaky

Kadir

Izadi

et al. 2018

Int Trans Electr Energ Syst

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“…The outcomes of the dynamic simulation and the testing of low speed EVs provide proof that the multi-objective optimization was accurate. The majority of research focuses on changing the magnetic flux distribution and reducing core losses, which are thought to be important factors that can affect how well various electrical appliances behave [27]. The slotted stator teeth switching reluctance motor (8/6 SST-SRM-5 kW) multi-objective design optimization is proposed in this research as a comprehensive framework.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of slotted stator switched reluctance motor for electric vehicle application

Kh Al-Farhan,

Sh Al-Yozbaky

2023

IJEECS

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The popularity of electric vehicles (EVs) and hybrid electric vehicles (HEVs) is projected to increase as environmental consciousness rises. They have emerged as a potential substitute for traditional electrical machines like the switched reluctance motors (SRMs). SRMs are renowned for their low cost of production and maintenance, built-in fault tolerance, and simple design. Additionally, because the machine's rotor construction does not require copper coils or permanent magnets, production costs are significantly reduced. However, it has disadvantages, including as high non-linearity, high torque ripple, and acoustic noise production. In this research, a method for designing slotted stator teeth switched reluctance motors (SST-SRM) in EVs using a genetic algorithm (GA) optimization design with multiple targets is provided. In order to achieve the best possible balance between peak torque (Tp), average torque (Tavg), and efficiency, the developed optimization function is chosen. The stator/rotor pole arc angle and slot width/depth are chosen as the optimized variables. When compared to traditional SRM, the optimization results of proposed SST-SRM demonstrate improvements in peak torque (24.40%, 36.98%, 42.73%, and 42.45%), average torque (7.40%, 29.94%, 33.00%, and 33.62%), and efficiency (0.27%, 0.52%, 0.97%, and 1.03%).

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“…Magnetic core structures vary depending on the application and the topology of the system. While different steel lamination grades were used before, with the addition of 4-5% silicon for steel, it is possible to reduce the eddy currents and hysteresis losses to some extent, and thus to increase the performance and efficiency of the transformer, with the addition of 4-5% silicon for steel [4,5]. Iron alloys, amorphous materials, soft magnetic ferrites and iron powders are the main groups of core materials for commercially available transformers.…”

Section: Introductionmentioning

confidence: 99%

The simulation of a new high frequency transformer

HATEM

Kurt

2022

Journal of Energy Systems

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Core losses of transformers motivate many engineers and scientists to design and implement different transformers for their specific aims. Since there exists a growing interest on high frequency applications in today’s world, design and optimization studies of a magnetic fluid core transformer (MFCT), having an easy and cheap production approach in high frequency applications, are considered in the present paper. The desired design should operate in a more efficient way within a wide frequency band. The MFCT considered here can be a solution to the eddy currents and core losses encountered in the conventional transformers with its low conductivity, oil-based magnetic fluid and super paramagnetic characteristic. The magnetic fluid in the proposed work consists of a combination of ferromagnetic particles made by iron in an averaged diameter of 70 µm with an adjustable magnetism compared to the traditional magnetic fluids and an engine oil, thereby the magnetic permeability of the overall fluid core can be fully adjustable by the variation of mass proportion between the oil and iron powder as an easy process without any chemical process. A COMSOL Multi-Physics design is performed via a finite element package in three dimensions. It is proven that the iron particles exhibit a complicated pattern inside the engine oil and produce a well-defined high frequency output at the secondary windings in a wide range of frequency.

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Analysis on magnetic flux density and core loss for hexagonal and butt-lap core joint transformers

Cited by 9 publications

References 23 publications

A new approach of core structure model for 3-phase distribution transformer

A new approach of core structure model for 3-phase distribution transformer

Multi-objective optimization of slotted stator switched reluctance motor for electric vehicle application

The simulation of a new high frequency transformer

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