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Originally Posted by Butcher
By partially energized I mean if you feed a 12V fan 6V it'll only put 6V through the coils - that's partial energizing by my book.  |
Ah! I understand. You were comparing PWM at a given CFM versus CFM regulation done by DC voltage adjustments.
Would it be that the coils are the same temperature for both schemes or even lower temps for the PWM? Input power for a given RPM should be similar for both PWM and DC methods, no? And if it is the same, then the wasted power would be the same.
No, I haven't gone through the math or done any practical testing, but I was curious if anyone actually knows.