Motor Reversal and Noisy: Troubleshooting Tips

[wolram]

I have just replaced an inverter driven 3ph motor and wired it the same as the old one, it runs (cogs) backwards and is noisy.

The motor is 230 v 3ph, it has 6 wires, yellow, black, white, violet, blue and brown.
testing with ohm meter i have 45 ohms between yellow- black, white-violet
and blue- brown.
so i connected as yellow- white, violet- brown, blue- black, this should give me a delta circuit, testing on volts the readings are equal between the three terminals, what is wrong?

 

[dlgoff]

I think all you need to do is switch two phases to reverse the direction of rotation.

Regards

 

[NoTime]

I havn't played with one of those since school.
IIRC getting the colors backward will cause problems like that. I think the high side colors are black, violet, and blue. Since you seem to be using yellow, white, and blue then running backward and cogging sounds about right.

School was a really long time ago

 

[capnahab]

Motor data plate

Please supply more data plate information. In most industrial applications a six lead three phase motor is one of the following:
1.) Star Delta start (two or three contactors needed depending if it is open or closed transistion)
2.) Part winding start (two contactors needed)
3.) Two speed motor (three contactors needed)

 

[capnahab]

Mistake

For a Star Delta start you need three contactors for open transition and four contactors for closed transistion. While I doubt you have this type of motor because of the ohms you measured it could be a two speed motor.