Magnetic detector bands for interior 3D-analyses of laminated machine cores

Pfützner, Helmut; Shilyashki, Georgi; Windischhofer, Andreas

doi:10.3233/jae-170101

Cited by 2 publications

(5 citation statements)

References 11 publications

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“…The detector band is manufactured by in-house developed 3D/2D printing assembler for manufacturing of variety of magnetic foils sensors for analyses in transformer cores, as presented in [13]. The assembler consists of an extruder for plastic material and two nozzles for conductive ink as well as of a large thermo-controlled platform of 1000 mm length and 400 mm width.…”

Section: Sensor Design and Manufacturingmentioning

confidence: 99%

Printed detector bands for measurements of strain in core interior of transformers

Shilyashki

Pfützner

Windischhofer

et al. 2018

Journal of Electrical Engineering

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In the recent years, the reducing of audible noise of laminated machine cores has become great importance, due to high relevance given to environmental awareness. The strain caused by magnetostriction and magnetostatic forces is recognized as one of the main sources of noise. Especially for transformers, strain in the core interior tends to be different from that on the surface, due to differences of clamping, variation of in-plane fluxes and pronounced off-plane (normal) fluxes. For the first time, local measurements of strain in the core interior are presented by means of a novel printed detector band. First results tend to be very promising, exhibiting very high sensitivity and resolution. So far, the relevance of measurements is restricted to comparisons of different core regions.

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Section: Sensor Design and Manufacturingmentioning

confidence: 99%

Printed detector bands for measurements of strain in core interior of transformers

Shilyashki

Pfützner

Windischhofer

et al. 2018

Journal of Electrical Engineering

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“…In cases where data from several crucial regions of a laminated core are needed (e.g., as being practical for model cores), the band should be replaceable without being damaged. These demands are met by a novel concept [ 18 ] by means of a printing procedure, using a thin paper as a carrier and positioner.…”

Section: Manufacturing Of Detector Bandsmentioning

confidence: 99%

“…By means of the described 3D/2D-assembler, detector bands of different sizes, up to 1000 mm length and up to 400 mm width, can be manufactured in an automatic way. As intended in the concept [ 18 ], such detector bands can be left into the laminated cores of even very large machines for their entire lifetime, enabling monitoring of operation and effective failure detection.…”

Section: Manufacturing Of Detector Bandsmentioning

confidence: 99%

“…The subject of the present paper are novel detector bands for effective, fast and simple local off-plane induction measurements that overcome most of the above-mentioned drawbacks of existing sensors. Based on a concept as presented in [ 18 ], several off-plane sensors are printed on a very thin paper substrate of 20 µm thickness. The sensors are given by frame coils of several turns, thus representing 3D systems.…”

Section: Introductionmentioning

confidence: 99%

“…The paper represents a partial realization of a basic concept developed by Helmut Pfützner, as presented in [ 18 ]. The manuscript was prepared by Georgi Shilyashki with contributions of Helmut Pfützner.…”

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confidence: 99%

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3D-Printed Detector Band for Magnetic Off-Plane Flux Measurements in Laminated Machine Cores

Shilyashki

Pfützner

Palkovits

et al. 2017

Sensors

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Laminated soft magnetic cores of transformers, rotating machines etc. may exhibit complex 3D flux distributions with pronounced normal fluxes (off-plane fluxes), perpendicular to the plane of magnetization. As recent research activities have shown, detections of off-plane fluxes tend to be essential for the optimization of core performances aiming at a reduction of core losses and of audible noise. Conventional sensors for off-plane flux measurements tend to be either of high thickness, influencing the measured fluxes significantly, or require laborious preparations. In the current work, thin novel detector bands for effective and simple off-plane flux detections in laminated machine cores were manufactured. They are printed in an automatic way by an in-house developed 3D/2D assembler. The latter enables a unique combination of conductive and non-conductive materials. The detector bands were effectively tested in the interior of a two-package, three-phase model transformer core. They proved to be mechanically resilient, even for strong clamping of the core.

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Magnetic detector bands for interior 3D-analyses of laminated machine cores

Cited by 2 publications

References 11 publications

Printed detector bands for measurements of strain in core interior of transformers

Printed detector bands for measurements of strain in core interior of transformers

3D-Printed Detector Band for Magnetic Off-Plane Flux Measurements in Laminated Machine Cores

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