Hi,
EMI filters are not that hard. Just look for single phase and two stage of sufficient current rating. Low leakage and all that sort of stuff is a minor detail, and not required.
This is an example:
https://nz.element14.com/schaffner/f...sis/dp/1191381
I would suggest one one the AC supply input to the VFD. The VFD is usually the worst producer of electrical noise. The EMI filter is to try to 'contain' the electrical noise generated by the VFD within
the VFD rather than have it get out and pollute the power supply to other more sensitive parts. I would have another EMI filter that is in the AC supply to the PC and any power supplies for the motion control board
and/or breakout board. Thus noise from the VFD has to 'get out' past one filter and then 'get in' past another filter.
The current harmonics drawn by the VFD are typically in the 3rd through to the 15th or so, so from 150Hz 750Hz. These frequencies are largely unabated by EMI filters. If these harmonics
create a problem with either other devices hooked to the same AC circuit, or give nuisance trips of the circuit breaker then either a line reactor or DC choke is indicated. These attenuate
the troublesome harmonics where EMI filters do not.
EMI filters and/or reactors for the servos would be nice, but I don't think required. All five of my servos operate directly off-line without any reactors or EMI filters, and without problem to date.
Yes, you are correct, it is the 'H' in the second last position of the part number that designates a high frequency model. Thus xxxx,xxxx,xxxxAA, is a standard model whereas xxxx,xxxx,xxxxHA is the high-speed model
Be aware that to use the higher output frequencies can be done in V/F mode only. If you were relying on vector mode for something or rather then these high-speed models are not the correct choice.
I have ben a fan of Delta VFD's for years and won't buy anything else. If someone wants to buy cheap, or at least cheaper Chinese made, the let them go for it. Of the twenty or so Delta VFD's I've bought and
supplied not a one has failed. That's what I want and that's what I paid for.
Craig