Hi Finding a data sheet on a TEC that goes past *very* basic stuff is essentially impossible. The bottom line is that the people who make them very much want to sell them to you. Finding information in those data sheets that suggest problems … not so much.
The problem is (mainly) physical. The expansion / contraction of the device is a big deal. KHz level PWM is (likely) not a problem. Aggressive cycling from something like a PID is indeed an issue. Bob > On Dec 21, 2020, at 6:43 PM, Hal Murray <[email protected]> wrote: > > [Old mail, context is TECs] > > [email protected] said: >> If the drive current ripple is too high fatigue failure from cyclic >> thermomechanical stress can be significant. > > Do good data sheets say anything about that? > > Is there a frequency term in there? Can I use PWM, which is as much ripple > as > you can get, as long as the frequency is high enough? If yes, ballpark of > how > high? > > Physically, where is the heat/cold generated? Is it mostly at the junction? > > -- > These are my opinions. I hate spam. > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
