VFD / Motor Combination

**grunto** · 2nd October 2014, 09:25 PM

Originally Posted by simonl

If you want variable speed then don't go with a single phase motor or a Jaycar kit. Go either a DC motor and speed controller of a 3 phase motor and VFD. The 3 phase motor I bought brand new for my mill was $40 and is made in Brazil. Not a bad quality motor either. I have a similar size 3 phase motor waiting to go on my lathe, it's S/H but a reputable brand motor none the less and in good nick, it cost me $30. Just need to keep looking. Fortune favours the brave AND the patient buyer.

Cheers,

Simon

Simon,

Pretty much settled on a VFD and 3 phase motor. Picked up a 3 phase motor from my Dad's shed on the weekend - can't argue about the cost (free) but may be a bit big for my application so I am still looking.

Grant

**BobL** · 2nd October 2014, 09:48 PM

Originally Posted by grunto

Simon,

Pretty much settled on a VFD and 3 phase motor. Picked up a 3 phase motor from my Dad's shed on the weekend - can't argue about the cost (free) but may be a bit big for my application so I am still looking.

Grant

What's the application?

**grunto** · 2nd October 2014, 10:22 PM

Originally Posted by BobL

What's the application?

BobL,

It is for a buffing / polishing setup that I am building. This thread has more details: https://www.woodworkforums.com/f65/buffing-setup-187886

Grant

**rob streeper** · 3rd October 2014, 05:55 AM

Originally Posted by grunto

Rob,

Good read - pretty much covers off everything I am looking at. One question - what is the 3 phase motor normally wired as? I am assuming delta?

Grant

Grant,

No idea, the motor wasn't marked and I didn't pull it apart to find out. Works fine though, plenty of torque even down at 25 Hz.

Cheers,
Rob

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