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Formula Sheet

Three-phase Circuits

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Magnetic Circuits

HFe = [pic] - BFe[pic]

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Transformers

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|ZSE(Primary)| = VSC/ISC

ZSE = VSC/ISC [pic]-cos-1 PF

YE = IOC/VOC [pic]-cos-1 PF

YE = GC – j BM

PF = cosθ = POC/VOC*IOC = PSC/VSC*ISC

η = Pout / (Pout + Ploss )* 100 %

Synchronous machine

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Induction machine

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DC- machine

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