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Tansformer Cores

Tansformer Cores

Tansformer Cores

(OP)
Need help. Wound cores vs Stack core. Which is better and why? I have never ben given a clear answer to this. Anything would help. Thanks

RE: Tansformer Cores

3-phase shell form cores are normally wound. A common configuration for wye-wye transf's is a 5-leg wound shell form core. Core form transf's are usually stacked. Delta-wye connected transformers commonly have 3-leg core with stacked laminations.

RE: Tansformer Cores

Shell or wound core is obviously better as it allows zero sequence flux / third harmonic flux to circulate easily keeping the corresponding impedances low. It also results in less height of the core limbs for a given transformer rating and thus is a default standard for large rating transformers (low height facilitates transportation).

Core type is economical and widely used for small and medium rating transformers.

RE: Tansformer Cores

(OP)
Core losses...on 2 differing cores. First core is wound such that each sheet is 1 complete turn plus the offset. The other is cut one complete turn less the gap.
The core with 1 turn less gap should be more efficient but how to prove it and why?

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