Manual - TC.P Quadro
Hardware options
2016-08-05
110/330
V04.52
4
4.2.9.
Internal Resistance Extensions (IRXTS) option
Function
The TopCon power supply can simulate the static internal resistance of
a source.
The basic problem
Due to the digital control, the TopCon power supply does not have any
apparent internal resistance.
The solution
-
+
= 9.6V
R
Innen
I = 12 A
R
Load
U
Ri
U
Load
U
L
-
+
= 0 V
R
Innen
U
Ri
U
Source
U
Source
2
1
Fig. 57
Internal resistance simulation
-1-
TopCon source with no load and internal resistance
-2-
TopCon source with load and internal resistance
Example calculation
The TopCon power supply simulates a rechargeable battery with an in-
ternal resistance R
Internal
= 0.8
Ω and a no-load voltage U
L
= 48 V.
A load current I = 12 A flows, the voltage at the load U
Load
is reduced by
20 % from U
L
Differentiation between cases - no-load
No-load voltage U
L
= U
Source
- U
Ri
= 48 V
– 0 V= 48 V
U
L
= U
source
No-load current
I = 0 A
Differentiation between cases - load
Voltage drop U
RI
= I * R
Internal
= 12 A * 0.8
Ω = 9.6 V
Load voltage U
Load
= U
Source
- U
Ri
= 48 V
– 9.6 V= 38.4 V
80 % of U
source
