Motech MT 4080 - Page 6

4
(
)
()
()
()
()
Ohm
Reactance
Resistance
Impedance
1
22
=Ω
=
=
=








==
+==
Ω∠=+=
−
S
S
s
s
s
sss
ss
X
R
Z
R
X
TanSinZX
XRZCosZR
ZjXRZ
θθ
θ
θ
There are two different types of reactance: Inductive (X
L
) and
Capacitive (X
C
). It can be defined as follows:
Also, there are quality factor (Q) and the dissipation factor (D) that
need to be discussed. For component, the quality factor serves as a
measure of the reactance purity. In the real world, there is always
s
X
s
R
(
)
sX,RZ
s
Z
θ
Imaginary Axis
Real Axis
Figure 1.1
)(
)(tan
2
11
)(tan2
HzFrequencyf
FceCapaciC
fCC
X
HceInducLfLLX
C
L
=
===
=
==
πω
π
ω