waterman Posted June 15, 2006 Report Share Posted June 15, 2006 Hi, check this ebay item http://cgi.ebay.co.uk/ELECTRIC-MOTOR-2-5HP...1QQcmdZViewItem Would this motor have two completely seperate sets of windings or would the 3 phase windings be re-jigged to enable 1 phase start and run? Or is he simply wrong and its purely a 1 phase motor. Copy of email from seller "Hi, the manufactureres are, melegari l. & figi, type 2-3 motore asincrono m90l n2 l. Sn fe1563, hope that helps, cheers," Also says he has run it as 1 phase but has no 3 phase to try out. Regards Link to comment Share on other sites More sharing options...
marke Posted June 15, 2006 Report Share Posted June 15, 2006 Hello waterman It is certainly posible to get a three phase motor rotating on single phase with the addition of an appropriate capcitor across one winding, or in series with one winding. I have never seen a manufacturer promot this as a dual mode motor. When operating a three phase motor on a single phase with a phase shift network, you will not get full performance from the motor, but I can not comment on what level of performance you will actually achieve. Perhaps someone has experience with this?? I suspect that the motor is a standard three phase motor with some instructions on connecting a phase shift capacitor to run on single phase. Best regards, Mark Empson | administratorSkype Contact = markempson | phone +64 274 363 067LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters Link to comment Share on other sites More sharing options...
jraef Posted June 15, 2006 Report Share Posted June 15, 2006 Odd to say the least. Seems like a lot of trouble to go through just to have that option. Looking at their website I don't see any reference to this configuration or even that they offer it as a special. That means this was probably a custom motor built for an OEM that wanted that 1-phase 3-phase option, probably for some kind of portable machine. Not likely that you would ever be able to get a replacement easily or find a shop that could rewind it without having to spend a bit of time figuring it out. But for 25 pounds, not a bad deal. I notice he doesn't mention the voltage however. "He's not dead, he's just pinin' for the fjords!" Link to comment Share on other sites More sharing options...
waterman Posted June 15, 2006 Author Report Share Posted June 15, 2006 Yes, my guess is that it wont deliver 2.5hp running single phase. If it did, it would be a lot more powerful on 3 and the physical size seems a bit small. If the bidding doesnt go up much maybe I`ll buy it just to investigate. Regards Link to comment Share on other sites More sharing options...
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