VFDs?

[irving2008]

The filter you need is a single phase one, at the input to the VFD as shown in 2.2.5 of the manual (although that shows a 3-phase filter but the idea is the same). Ideally the output wire should be wrapped through a ferrite ring (of the right size for the cable) to kill high frequency harmonics. It will work quite happily wthout either but you may get noise back into the ring main (not that you are going to run this off the ring main with an input current of 16A, needs a direct connect back to the board on a 20A MCB)

That PDF is issue 2, maybe yours is a different issue - use the later of the two.

[graffian]

Well all didn't go well.
I connected it to the motor it will be running. Set the parameters listed in the 'simpletons guide to getting
started' bit of the pdf. That's just re-setting the V/f parameters to default[which would be a 5kw motor]
and setting a maximum current.
Hit run and the spindle accelerated very slowly to maybe 25 or 30 rpm before an oL2 error appeared. oL2 is
inverter overload. played with the V/f settings, upping the voltage as 12V at 1.5 hz didn't seem a lot.
It accelerated a bit better on the next go, but still really slugish and oL2 error again.
So I whacked it on my coolant pump, I set the max current a lot lower but left every thing else as it was.
The pump doesn't have a plate, probably got washed off, but the motor is a good 6" diam by 6inch long.
It accelerated nice and smooth took it up to 200Hz still pretty good.

So not very promising.