How to control an Electronic Load to give me a constant power output.

[wrathofskidog]

I need to keep a constant power output on my electronic load. The voltage and more so the current will be dynamic in order to keep the power constant. I am new to Labview and am trying to write code to accomplish this task.

[chutla]

Dear Wrath:

Do you know if your load is a constant impedance (or resistance)? If so, all you need to do is assure a constant voltage across the load. If the resistance is variable, you must know the current AND the voltage. In either case, a simple feedback loop or loops in Labview should do the job. For a variable impedance load, you will need to multiply the current and resistance to obtain a power reading, which, in turn will be used to adjust your output voltage. ( An iterative shift register, where you compare a current value to a previous value is a simple, stable way of achieving a feedback loop).

I will be glad to work on this code with you.

Eric