Quote:
Originally Posted by MPaulHolmes
One thing I'm very curious about: Will the driving smoothness be affected by the spread spectrum switching? The period keeps changing, which may complicate the PI loop convergence. But it might be OK. One test is worth a 1000 theories, as they say. haha
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Just took it for a 4 mile test run with the spread spectrum software. Drive-ability was unaffected. It was just as smooth as with the 8 khz.
The sound was quite different instead of a whine it now makes a hiss. The best I can describe it is the truck sounds like it is leaking air. It is about the same loudness as the 8khz whine but it blends in with the background noise and is much easier to ignor.
It didn't seem to be heating any different than with 8 khz pwm but data logging and more driving would be required to be sure.
Jerald