[Pacif13r]

Re: Fisher & Paykel – Smart Drive 051 not turning well

Penguin45 wrote:Three sets of windings in the stator – sounds like you’ve got a short. Check the area around the connectors carefully.

Penguin45.

Just writing to say I’d found the problem when email notification of your message arrived. That is exactly where I found the problem in the end. Pushed the Yellow connector wire down so it followed the plastic molding and didn’t stretch taut under the other copper and it sorted it nicely.

I found one of your posts on this board for another motor but in it you confirmed that all terminals should be roughly equal in resistance and that had led me to take the plunge of a close up copper hunt.

Thanks =D

[Pacif13r]

Re: Fisher & Paykel – Smart Drive 051 not turning well

I’ve come to the conclusion that this motor is not like a stepper motor and that the notch like feeling every few degrees is not right. I was thinking that this could be magnetic resistance caused by feedback into the coils so I’ve unplugged them from the controller and measured the resistance on what I understand to be 3 phases on those 3 plugs. I’ve measure the resistance across the terminals and discovered that there is one phase which is the odd one out.
Red – Yellow = ~13 Ohms
Red – Blue = ~13.6 Ohms
Blue – Yellow = ~0.8 Ohms

Not what I would have expected but I’m no 3phase motor expert and it’s all guesswork without a known working reference. Can someone confirm if this is not normal?

Many Thanks
Justin

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