Gallery, Projects and General > Project Logs
home made mill
krv3000:
hi mick the motor has 3 plus the earth the third is for switching the motor for forwards to revers threw the forward and revers switch has any on got one of them inverters going cheep
krv3000:
hi all jus a up date the motor is 440 volt three phase its off to a motor rewing furm will get to no no munday haw mutch its gowing to cost me to get it we rawnd for 240 vlot singel phase
mattinker:
I would have thought that it would be cheaper to run it with a phase converter than to rewind it. It is possible, in some cases to convert a 440volt three phase to 240 three phase by separating the middle of the "star" connections and extending the coils out to the junction box. A star wound motor has one end of it's three windings connected together, each of the three windings are 240 volt, the sum of any two of the windings gives 440 volt capacity. I'm sure that a reputable re-winding firm would be able to tell you whether they could convert it to 240 three phase in vu to running a phase converter with the added advantage of speed control!
All the best, Matthew.
krv3000:
hi well in theory yes but all the wiring is inside the motor casing and there is no way to get in without destroying the windings well insulated with that varnish stuff so its gone to be rewound
mattinker:
Well, that's why I said in some cases, the star connection is done last, so you can very often "operate" on it!
Looking forward to seeing it up and running!
All the best Matthew.
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