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Given an isolated single phase inductance $L_{m,1phase}=15mH$, what is the apparent working phase inductance in balanced three-phase operation? (Neglect leakage inductance; answer in $mH$ to 1 decimal place.)
$L_{m,1phase}=15mH$
Given a single phase inductance $L_{m,1phase}=19mH$, what is the $d$ or q axis winding self inductance (neglecting leakage)? (Answer in $mH$ to 1 decimal place.)

1. In a balanced three-phase operation, the apparent working phase inductance can be determined using the formula:

Lapparent =

Substituting the given value of Lim = 15 mH into the formula:

Lapparent = 15 mH / ?3 ? 8.7 mH

Therefore, the apparent working phase inductance in balanced three-phase operation is approximately 8.7 mH.