تم الحل ✓
categoryالهندسة الكهربائية
schoolبكالوريوس
event_available2026-07-15
السؤال
Transcribed Image Text:
2. In the videos, we found the Neumann integral for the mutual inductance
M21 between two concentric circles of radii A and a, respectively, at a distance
from each other (Maxwell's inductance),
2 2π
M21
Но
4T
00
Aa cos(2-1)did2
VA2+a2+62-2.Aa cos(2-1)
2.1. Find a similar Neumann integral (no need to solve it) for the case of two
concentric ellipses with semi-major axis A and a and semi-minor axis B
and b, respectively. Assume the two ellipses belong to two parallel planes
at a distance 5 from each other, as shown in Fig. 2.2. [10 points]
2.2. Show that the result found in 2.1 reduces to the Neumann integral for two
concentric circles when A = B and a = b. Consider then the elliptic integrals
solution
M21
HoAa k
√(-2)+]
Assume A a 1 m and 5-e-1/4 with r = 1 mm. Under these conditions,
can be assumed to be small. Using these numerical values and following closely
all derivations in the videos on the Maxwell's inductance, compare the
approximate result for M21 when considering the first two terms (i.e., up to k²)
in the series expansions for F(k) and E(k)
F(k)
+
² 1² + ( 1.3) ² 1/4
32
付
1.3.5 2
+
6.
2-4-6
1.3.5 26
.4.6
to the approximate result obtained when considering just the first term (i.e., In 4/
k, and 1, respectively) in the series expansions
4
F
In
k₁
E
~1+1
In
4
1
-
2. In the videos, we found the Neumann integral for the mutual inductance
M21 between two concentric circles of radii A and a, respectively, at a distance
from each other (Maxwell's inductance),
2 2π
M21
Но
4T
00
Aa cos(2-1)did2
VA2+a2+62-2.Aa cos(2-1)
2.1. Find a similar Neumann integral (no need to solve it) for the case of two
concentric ellipses with semi-major axis A and a and semi-minor axis B
and b, respectively. Assume the two ellipses belong to two parallel planes
at a distance 5 from each other, as shown in Fig. 2.2. [10 points]
2.2. Show that the result found in 2.1 reduces to the Neumann integral for two
concentric circles when A = B and a = b. Consider then the elliptic integrals
solution
M21
HoAa k
√(-2)+]
Assume A a 1 m and 5-e-1/4 with r = 1 mm. Under these conditions,
can be assumed to be small. Using these numerical values and following closely
all derivations in the videos on the Maxwell's inductance, compare the
approximate result for M21 when considering the first two terms (i.e., up to k²)
in the series expansions for F(k) and E(k)
F(k)
+
² 1² + ( 1.3) ² 1/4
32
付
1.3.5 2
+
6.
2-4-6
1.3.5 26
.4.6
to the approximate result obtained when considering just the first term (i.e., In 4/
k, and 1, respectively) in the series expansions
4
F
In
k₁
E
~1+1
In
4
1
-
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