Yeah from what I’ve read a vfd would be a lot simpler solution but the bao has two motors plus I think they’re 400v. So standard vfd isn’t an option. Which led me down the route of building a rotary phase converter. From what I’ve seen online they seem not too hard to put together provided I follow a plan accuratelywallace":vyzxozb9 said:If you plan on just having one 3 phase machine then a vfd is possibly the best option.
If your going down the wadkin slippery slope then a rotary converter is a good option. A static is a poor second place but works.
If I could get the stepped vfd that produces the 400v 3phase then would this then become an easy operation? Or is the feed motor hard to access? I’m presuming I’d need 2 different vfds calibrated to each motor, although if it’s possible to run off one vfd and have less controllability of feed speeds I might consider thatTrevanion":1qteaq0l said:The only awkward bit is the Wadkin BAO part. The separate 400v (I don't think either is dual voltage) motors make it a royal pain for conversions to single phase power. The machine is also very awkward to change motors to 240v from what I understand from when I was looking into it and the machine ideally needs to be stripped down to take them out.
I would personally avoid going down that route (As I did in the end) and keep an eye out for a single phase machine / a more easily converted one. By the time you've put down the money and time into a rotary phase converter you might as well have bought a single phase machine.
Ttrees":2ei5l0vl said:Sorry, I can't give much help, but just to let you know there's newer VFD's on the market,
that will power 400v motors.
For a Chinese 3hp, it costs under £150, compared to under a £100 quid for the more typical 240v voltage out.
Thanks I didn’t realise they were that cheap. Where have you seen them? eBay?
[/quote]Joshjosh":1zbtixzf said:Thanks I didn’t realise they were that cheap. Where have you seen them? eBay?
Thanks for the help I’ll have to wait till it’s delivered and see what access is like to the motorsmemzey":1nf0132a said: