Magnetostriction in grain‐oriented electrical steels under AC magnetisation at angles to the rolling direction

Somkun, Sakda; Moses, Anthony John; Anderson, Philip Ian

doi:10.1049/iet-epa.2016.0170

Cited by 14 publications

(3 citation statements)

References 27 publications

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“…In 2015, Daisuke Wakabayashi et al discussed the vector characteristics of magnetostriction under alternating magnetization and adopted a new measurement method to deal with the angular relationship between magnetostriction and magnetic flux density [8]. In 2016, Sakda Somkun studied local deformation caused by magnetostriction [9]. In the same year, Setareh Gorji Ghalamestani and other scholars measured electrical steel sheets under higher harmonics and explained this phenomenon with magnetic domains [10].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Vibration Characteristics and Vibration Reduction Methods of Iron Core Reactor

Wang,

Yu,

Duan

et al. 2023

Actuators

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Series iron core reactors are one of the most commonly used electrical equipments in power systems, which can limit short-circuit currents and suppress harmonic waves from capacitor banks. However, the vibration of the reactor will not only generate noise pollution but also diminish the service life of the reactor and jeopardize power system safety. In order to reduce the vibration noise in the core disc region of the reactor, the vibration characteristics of a core reactor are calculated by modifying the anisotropy parameters of the Young’s modulus of the core disc lamellar structure and introducing the core magnetostriction effect based on the simulation analysis method of electromagnetic and mechanical coupling. A detachable single-phase series core reactor model is established, and the validity of the simulation calculation is measured and verified. At the same time, from the perspective of improving the air gap size of the series core reactor and the arrangement of electrical steel sheets, the corresponding iron core vibration reduction scheme is given. The average vibration reduction in the reactor is about 11.6% after comprehensive improvement according to the vibration reduction scheme, which provides an effective method for realizing the vibration and noise reduction in the reactor.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Vibration Characteristics and Vibration Reduction Methods of Iron Core Reactor

Wang,

Yu,

Duan

et al. 2023

Actuators

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“…On the one hand, some methods about reducing the noise have been developed by means of adjusting the overlapping method and clamping pressure on the cores [18][19][20][21]. On the other hand, magnetostrictive properties are being studied by carrying out some experimental tests on a single steel sheet under an alternating magnetization [22,23]. However, it will be more significant to investigate the magnetostrictive strain in the laminated core because the magnetostrictive properties in the transformer core will be different from those in a single steel sheet due to its complicated lamination configuration and magnetization patterns in the engineering application.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Magnetic and Magnetostrictive Characteristics of Transformer Core Based on Triaxial Strain Gauge and B-H Vector Sensor

Wang,

Fan,

et al. 2023

Sensors

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As is well known, the magnetostrictive phenomenon of electrical steel sheet is the main source of electricity in equipment such as transformers. The magnetostrictive characteristic of the actual transformer core is more complicated than that of single-sheet steel. The magnetostriction phenomenon of the transformer core cannot be fully understood by studying only a single piece of electrical steel, so it is necessary to study the local magnetic characteristics of the transformer directly. In this paper, two-limb, one-phase transformer core with a multi-step-lap construction was assembled, a laminated magnetostrictive testing system based on triaxial strain gauges was built, and the local magnetic characteristics were studied using a self-developed B-H vector sensor. The magnetostrictive and magnetic properties in different local regions were measured and analyzed under several magnetization patterns, and the influence of DC bias on the magnetostrictive property of the corner, yoke, and limb of the core was investigated. The influence of the position of the clamp on the magnetostriction of the transformer core was also studied. The magnetostrictive strain of the single sheet and laminated core was compared and discussed. The results showed that the strain caused by the interaction between laminations in this area can be effectively reduced when clamping in the middle of the yoke.

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“…These vibrations are caused by the electromagnetic forces in the windings, magnetostrictive forces in the core and mechanical excitations from auxiliary components such as fans, pumps etc. [139][140][141][142]. A typical vibration spectrum of a power transformer is composed of a fundamental component at twice the power frequency and several other peaks at integer multiples of fundamental frequency [143].…”

Section: Application Of On-load Transformer Vibrations For Structuralmentioning

confidence: 99%

Understanding the moisture temperature and ageing dependency of power transformer winding clamping pressure

Naranpanawe¹

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Progressive loss of winding clamping pressure is a failure mode that reduces the short circuit withstand capability of power transformers. Short circuit faults exert strong electromagnetic forces on the transformer winding structure, which could deform and displace its conductors. Failure to maintain the structural integrity of the winding structure during short circuit faults often leads to a catastrophic transformer failure, which could cause a disastrous network failure.

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Magnetostriction in grain‐oriented electrical steels under AC magnetisation at angles to the rolling direction

Cited by 14 publications

References 27 publications

Analysis of the Vibration Characteristics and Vibration Reduction Methods of Iron Core Reactor

Analysis of the Vibration Characteristics and Vibration Reduction Methods of Iron Core Reactor

Measurement of Magnetic and Magnetostrictive Characteristics of Transformer Core Based on Triaxial Strain Gauge and B-H Vector Sensor

Understanding the moisture temperature and ageing dependency of power transformer winding clamping pressure

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