Eddy Current Effects on the Asynchronous Performance of the Hysteresis Machine

Mor, Amram; Gavril, S.

doi:10.1016/0016-0032(82)90062-x

Cited by 3 publications

(1 citation statement)

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“…In a broader sense, there are two commonly used techniques in the transformer manufacturing industry to evaluate the winding Eddy current losses: (i) direct computation of the EMF using Maxwell's equations in [21][22] and (ii) use of Poynting's theorem in [21][22]. Early attempts to compute the EMF using both these methods are presented by authors in [23]. In the book Transformer Engineering: Design and Practice [24], the authors described these methods and how they can be embedded into manufacturers internal design programs to compute the Eddy currents.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for Evaluating Eddy Current Loss in Wind Turbine Generator Step-Up Transformers

Thango¹,

Jordaan²,

Nnachi³

2021

Adv. sci. technol. eng. syst. j.

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South Africa is aiming to achieve a generation capacity of about 11.4GW through wind energy systems, which will contribute nearly 15.1% of the country's energy mix by 2030. Wind energy is one of the principal renewable energy determinations by the South African government, owing to affluent heavy winds in vast and remote coastal areas. In the design of newfangled Wind Turbine Generator Step-Up (WTGSU) transformers, all feasible measures are now being made to drive the optimal use of active components with the purpose to raise frugality and to lighten the weight of these transformers. This undertaking is allied with numerous challenges and one of them, which is particularly theoretical, is delineated by the Eddy currents. Many times the transformer manufacturer and also the buyer will be inclined to come to terms with some shortcomings triggered by Eddy currents. Still and all, it is critical to understand where Eddy currents emanate and the amount of losses and wherefore the temperature rise that may be produced in various active part components of WTGSU transformers. This is the most ideal choice to inhibit potential failure of WTGSU transformers arising from excessive heating especially under distorted harmonic load conditions. In the current work, an extension of the author's previous work, new analytical formulae for the Eddy loss computation in WTGSU transformer winding conductors have been explicitly derived, with appropriate contemplation of the fundamental and harmonic load current. These formulae allow the distribution of the skin effect and computation of the winding Eddy losses as a result of individual harmonics in the winding conductors. These results can be utilized to enhance the design of WTGSU transformers and consequently minimize the generation of hotspots in metallic structures.

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