Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!cis.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!emory!kd4nc!km4ba!alan
From: alan@km4ba.uucp (Alan Barrow)
Newsgroups: comp.robotics
Subject: Re: DC Motor Controllers
Message-ID: <1991Jun19.051550.1160@km4ba.uucp>
Date: 19 Jun 91 05:15:50 GMT
References: <1991Jun3.220425.12281@osceola.cs.ucf.edu> <28960001@teecs.UUCP>
Organization: km4ba's packet radio gateway
Lines: 20

I like the H bridge discussion, but do not see how that will help
on a brushless motor.

I read the problem as being with the PWM part of the picture.
How about:
     changing the PWM base frequency

     filtering the PWM'd output. (May not work well with brushless
     motor, but would be ok for regular motors.)

I play with HP HCTL-1000's for motor control. They may be worth a
look.

Good Luck!

 Alan Barrow  km4ba | I've seen things you people wouldn't believe. Attack
 jab@hpuerca.hp.com | ships on fire off the shoulder of Orion. I watched
                    | C-beams glitter in the dark near the Tannhauser gate.
 ..!gatech!kd4nc!   | All those moments will be lost in time -
         km4ba!alan | like tears in rain. Time to die.          Roy Batty