NI 9478 Operating Instructions and Specifications
16
ni.com
Example One
Yo
u
are driving a load with 2.0 meters of cable thro
u
gh a cycle in
which the NI 9478 is on and passing 1.25 A of c
u
rrent for 40
μ
s,
then off for 10
μ
s. The o
u
tp
u
t period is 50
μ
s (40
μ
s + 10
μ
s) so the
o
u
tp
u
t freq
u
ency is 20 kHz. The channel
u
ses 14.8% of the total
power b
u
dget, as shown in the following eq
u
ation.
4% 1.25
2
(
)
0.12% 2.0 0.2
–
(
)
1.25
2
(
)
0.04% 1.25 1
+
(
)
+
[
]
20
+
14.8%
=
