The Shop > Tools
New toy.
DavidA:
VT,
Thanks for that link.
It certainly adds to my growing pile of info on generating the third phase.
But it falls down at the first fence; I need 415 Volt.
Dave.
Arbalist:
Have you checked the motor plate Dave? The motor on my old mill could be run on 415 or 240V.
vtsteam:
David the principles are the same, though.
You would need start and run capacitors rated for 415V motors (which I I'm sure are available in the UK), and if you use a single phase starter motor it would be the type used at your usual mains voltage.
The method of checking voltage across the legs to balance the capacitor values is the same.
So unless you don't have 415 at all, you could basically follow the same procedure.
hmmmm.....maybe that's what you're saying...
mattinker:
--- Quote from: DavidA on August 13, 2014, 08:04:38 AM ---
But it falls down at the first fence; I need 415 Volt.
--- End quote ---
So, you need a 240/415 step up transformer to put in front of you three phase creating set up!
Regards, Matthew
awemawson:
When I was making phase converters (and I've made a few) I would find a 240 isolating transformer with multiple input a output tappings. Most have a pair of nominal 120vwindings in series with +/- 10% adjusting tappings
Wire all four in series. Bung 240 across the middle pair and take your 415 off the ends having selected suitable tappings to get 415 ish volts not 480.
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