User manual

Quick-Ohm Küpper & Co. GmbH
Components – Heat-Management - Ceramics
www.quick-ohm.com vXIII/07/nk
- 4 -
Controlling characteristics:
The following figures show a typical control mode of the temperature as function of time. In this
example, the set-temperature is lowered from ambient temperature to -15°C. The left figure shows
the current, the right figure the temperature. This shows an optimal behavior of the controller.
Stromverlauf Kühlen
0
20
40
60
80
100
120
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29
Zeit
Strom/100%xImax
Temperaturverlauf Kühlen
-50
-30
-10
10
30
50
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29
Zeit
Temperatur/°C
5.Tips:
1. If the heatsink temperature is roughly above ambient temperature, the dimensions of the
heatsink are too small. A bigger heatsink and/or a fan can increase the heatexchange between the
heatsink ans te ambient.
2. The lowest temperature a single stage TEC can reach is around 70K below the temperature of
the hot side. Please regard that the temperature of the heatsink is always lower than the
temperature of the hot side because of the thermal resistance of the gap.
3. Mount the temperature for the controller close as possible to the TEC to improve the control
mode.
4. The heatsink must be able to dissipate the sum of cooling and electrical power as thermal
energy.
Current while cooling
Temperature while cooling
C
urrent in %of Imax
T
emperature in °C
time in s time in s