On Fri, 22 Apr 2011, Robert Pabon @ Corse USA wrote:
> Date: Fri, 22 Apr 2011 07:43:52 -0700 (PDT)
> From: "Robert Pabon @ Corse USA" <robertpa...@corseusa.com>
> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
> Subject: Re: [Emc-users] Motion control cards
>
> Thanks andy< I sent out my motor feedback specs with another email and will
> try to keep the information brief so I don't become redundant. I was looking
> at the Mesa amps and it looks like only the 7I39 is a BLDC amp, the 8I20
> appears to be AC (although granites VSD will run AC and BLDC, so maybe it
> can, I don't know). I am trying to keep this as dumb and generic as possible
> for a couple of reasons (parts sourcing and finding help) so I am trying to
> stick with what has been more or less proven. Rob
As far as servo motors go there is no real difference between AC and BLDC, all
brushless servo motors are "AC", that is 3 phase AC driven synchronous motors
with permanent magnet rotors. The 8I20 (and the 7I39) are intended for driving
this class of motor. There is sometimes a slight difference in pole shaping
for optimization with different drive waveforms (sine or trapeziodal) but if
you look at motor data sheets you will find that pretty much all brushless
servo motors will work fine with sine wave drive.
Peter Wallace
Mesa Electronics
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