On Fri, 25 May 2012, andy pugh wrote:
> Date: Fri, 25 May 2012 18:48:00 +0100
> From: andy pugh <[email protected]>
> Reply-To: "Enhanced Machine Controller (EMC)"
> <[email protected]>
> To: "Enhanced Machine Controller (EMC)" <[email protected]>
> Subject: Re: [Emc-users] Commutating Reactor
>
> On 25 May 2012 18:39, Peter C. Wallace <[email protected]> wrote:
>
>> Ahh its a standard kind of thing:
>>
>> www.mtecorp.com/SineWave_Filter_4pg_Form1214A-2.pdf
>
> The Mesa cards can output a 3-phase PWM. Presumably a lot of the cost
> of the PhasePerfect is the control software...
> (I also suspect that they might have acetic switching to "dump voltage" too. )
>
>
>
> --
> atp
> If you can't fix it, you don't own it.
> http://www.ifixit.com/Manifesto
>
With a inverter of any type, a post filter is likely needed so the mill infeed
sees nice 3 phase sine waves rather than x KHz rectangular pulses waves with
sinewave PWM modulation
(I notice even automationdirect has 3 phase line
inductors)
>
Peter Wallace
Mesa Electronics
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