Transwave monitor the voltage on the generated third phase with a Bryce voltage sensitive relay which drives a contactor. This reduces the capacitance in circuit when the voltage rises to an acceptable level.
(*) Most commercial statics, Transwave included, actually use an 'autotransformer' where the primary and secondary are one continuous winding. There are three sections in series, an 87.5v, then a 240v, then a 87.5v. Normal single phase is applied to the 240v central section, and the 415 output is accross the extreme ends ie all three windings. This significantly reduces the ammount of copper and hence cost of the transformer
The transformer I pictured is for sale, I was offered £150 for it, by someone on here who never got in touch again. I have no idea of it's weight but it's 15kva and about a foot wide, it was supplied with a Matsuura milling machine.
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If i was to get a digital inverter how is it wired up and what hp would I need out of one to power the welder?
If the motor doesn't have a 230v winding, you either need a 415v output inverter, or a new motor, or live with only having full torque to 28 Hz rather than 50 Hz speed.
It's usually not that difficult to open up the motor find the star point of the windings and add additional wires to the input to create a delta wired motor. Most modern motors are easily swapped start to delta by adjusting the positions of link bars on the six wiring terminals.
That's was me, We talked about how it was to be collected etc, I sorted the courier, even had your address, then you stopped replying to my PMs.
In a word yes. A guy in the states has devised a method to make a single to 3 phase transformer using a modified 3 phase transformer and capacitors. It definitely works. No moving parts, no heat or messing about. I have the instruction DVD's.
hello every body
is any 1phase input 3phase output transformer out there let me know
thanks
jeet