I think our forktruck is 36V and about 1 kHz judging by ear. It sounds fine, but not "pleasing" But I don't much care for 10kHz squealing. Much higher and I can't hear it well enough to care, at least when the vehicle is moving.
Seth Jon \"Sheer\" Pullen wrote: > > ----- Original Message ----- > From: "Joe Smalley" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Tuesday, September 10, 2002 8:55 PM > Subject: Re: PWM speed controller frequency? > > > That is like asking a musician for his favorite note on the scale. > > > > My car sounds about middle C but it annoys an awful lot of people. > > > > If I were doing it, I would put it above 22 kHz so it only annoys the > dogs. > > 25kHz, otherwise it will annoy the dogs and the Sheers. > > The trick is to balance switching losses against noise. However, for a > scooter, it probably doesn't really matter that much. > > S. -- vze3v25q@verizondotnet
