Loading unit for test setups
We have created a load unit with which a consumer can be simulated in a test setup for one of our customers. In this way, different currents can flow in a controlled manner.
The load unit should have the following functions:
- a temperature monitoring, which sends a digital signal to the measuring computer
- a digital input for switching the unit on and off
- a digital input for switching between 80 and 40 Ohm
- permanent, active cooling
We built the low-inductive resistance load from two strands of 80 ohms each. Both strands are located on a board and are realized with 16 resistors with 5 ohms each which are connected in series . Each of these resistors is designed for a maximum power dissipation of 100 W.
We have realized the switching on and off as well as the switching between 80 and 40 ohms via a power relay. In this way, we can ensure a secure galvanic separation between the control and load circuits.
We have also designed the load unit in such a way that it can be used flexibly – both individually and in combination with one of our transformers as a voltage source.
In addition, we have taken care to integrate a sufficiently large heat sink into the unit to be able to absorb high temperatures.
