© EA Elektro-Automatik in 2022, this information is subject to change without notice
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06230820_manual_psi_10000_3u_15kw_en_01
3.2.4
Internal resistance regulation
Internal resistance control (short: CR) of power supplies is the simulation of a virtual internal resistor which is in series to the
load. According to Ohm’s law, this resistance causes a voltage drop, which will result in a difference between the adjusted
output voltage and the actual output voltage. This will also work in CC or CP mode whereas the actual output voltage will
differ even more from the adjusted voltage, because both modes limit the output voltage additionally. CR mode is actually
running in CV, but will be indicated as CR on display once the adjusted resistance value is reached.
The adjustable resistance range of a particular model is given in the technical specifications. The voltage regulation in de
-
pendency of the resistance set value and the output current is done by calculation in a fast ARM controller, being only a little
slower than other controllers inside the control circuit. Clarification:
U
Act
= U
Set
- I
Act
* R
Set
P
Set
, I
Set
P
Ri
= (U
Set
- U
Act
) * I
Act
With resistance mode being activated the function generator will be unavailable and the actual power
value provided by the device does not include the simulated power dissipation of Ri.
