an investigation of dual stator winding induction machines

∫ H ⋅ dl = ∫ J ⋅ ds = N ⋅ I
(3.8)
O
S
where, O is a closed boundary of area S , N is the number of conductors carrying
current I .
Definition 3.4:
The Magneto-Motive Force (MMF) of any closed path C is defined as:
F = ∫ J ⋅ ds = N ⋅ I
(3.9)
c
S
where, S , N and I are as defined in definition 3.3.
Definition 3.5:
The magnetic flux passing through the area S is defined as:
φ s = ∫ B ⋅ ds
(3.10)
S
If there are N coincident conductors bounding the area S , the linkage flux can be
expressed as:
ψ s = N ⋅∫
B ⋅ ds
(3.11)
S
Definition 3.6: Faraday's Law
Faraday's law is very important since it gives a way to understand and explain the
links between magnetic field and electric field. It can be expressed as:
d dψ
∫ E ⋅ dl = − B ⋅ ds = −
dt ∫
(3.12)
dt
O
S
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