[chbot] 3 phase motor drive

[Mike Smith]

A single phase to 3 phase drive will work fine for this, have used
quite a few of these

Most 3 phase motors can be either 400v (star) or 230v delta configured
so can run from a drive with 230v output

I have one here new from Aliexpress but is only 2.2kw

Mike

On Fri, Jul 15, 2016 at 11:59 AM, Mark Beckett <m.beckett at amuri.net> wrote:
> Let me check tomorrow.
> I might have one but not sure of the rating.
>
> Mark
>
> Robin Gilks wrote:
>
> Greetings all
>
> My project to make a 6kw 48vDC to 240vAC inverter is nearing completion so
> I'm looking at ways to drive my irrigation system to make the best use of
> my solar PV power (rather than just export it).
>
> The well pump is 3 phase 4 hp (i.e. 3kw) but of course the inverter output
> is single phase.
>
> I'm thinking that a Variable Frequency Drive, designed to operate 3 phase
> lathes etc, would be a better (i.e. more efficient) way of getting the
> conversion than a 10hp 3 phase induction motor and a stack of capacitors
> as a rotary converter.
>
> I've had a quick scan of aliexpress and similar but there is a lot of
> ambiguity between input and outputs volts (I'm looking for 240 in and 440
> out) and there seems to be a step in price when going over 2kw.
>
> Firstly, does anyone know if a VFD is suitable for this application
> Secondly, does anyone know of a second hand unit at a reasonable price.
>
> Cheers
>
>
>
>
>
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