WEBVTT

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Two cores can use the same

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steel and still draw
different magnetizing

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current.

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Look at the joints.

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Air presents much
higher magnetic

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reluctance than
grain oriented steel.

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A step lap lets flux transfer

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into overlapping
sheets and bypass a

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gap.

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Wider or uneven
gaps restrict that

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transfer and can
concentrate flux locally.

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Check both mating
sheet lengths and

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the mitre angle.

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Burrs or debris can hold the

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joint open.

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Stack against fixed guides,

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then preserve the
same lacing pattern

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when the top yoke is rebuilt.

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Compare the assembled
joint with its

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drawing, and review
magnetizing current

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alongside no load loss.

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A material certificate
alone does not

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describe the finished joint.