electric motor experts

[outofthefire]

My mate has asked me to wire his motor and power inverter but i'm struggling at the first stage. The motor needs to be wired for 240 volts 3 phase. I can't tell how its been wired because the diagram and the back of the cover is missing, anybody else got a clue?

 

[rtbcomp]

Do those three white wires connect to the mains supply or do they go back into the motor?

 

[rikrobson]

if the white wires are the feed it looks to be in star. there should be 3 wires on the N. for delta, which you want no wires on the N

these are the other ends of the coils abs need to to the next terminal from the other end. buzz out the wires and you should get 3 pairs e.g. Red - White, Blue - Grey, yellow brown. then if red - A Yellow - B Blue - C wire the Grey A, Brown B and White C for this example. you dont want both ends of a coil on the same post. This leaves nothing on the N terminal and wire up your 3 phases to the A,B & C. if it goes the wrong way swap 2 of the phases.




http://www.practicalmachinist.com/v...-phase-motor-star-delta-configuration-164360/

 

[rtbcomp]

This is what you're trying to achieve

 

[Luke]

As above, you need to identify the two ends of each winding, using a meter.

That said, that looks like an old motor. It's likely that the high frequency PWM from the inverter will accelerate the breakdown of the winding insulation.

Luke

 

[outofthefire]

Thanks a lot chaps I think that makes sense, the white wires are the feed wires. I can leave them there and rearrange the other wires over ABC keeping the coils on separate terminals.

 

[philpullan]

ok so I have this exact same problem from the same motor company but my motor is much newer im trying to swap it to 220v but im not quite sure where to be putting my wires, best I can work out from that picture above is that I need to work out which wires go to each winding so after ive done that what do I do with the two ends from each winding and after that to which do I connect the + AND - to ???

cheers guys phil

 

[ford34/2]

Wiring

Is it a dual voltage 3 phase motor??? A picture speaks a thousand words.

might be better to start your own thread, and you may get more response.

Stan

 

[outofthefire]

Just to let you know I wired this up at the weekend and it worked a treat, I did test the coils but it turned out that the three wires on the N post in the pic were all different lengths and in the right order. I was really impressed with the inverter as well it worked a treat has speed control and forward reverse switch.