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Standard motor ok for VFD?


 

I am considering replacing an uber complex mechanical variable speed drive (feed system on a Griggio planer) with a VFD.? I already bought a new C faced 3 phase motor and have a drive that will work , but was wondering if it needs to be a motor of any special duty rating, etc.

Marlowe McGraw?


 

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Pretty much any current manufacture motor will run on a VFD, the trick is how much above and below the standard 60hz you can run. I would say from 30hz to 120hz on most motors. My CNC mill runs from 10hz or so on the low end to 200 hz on the high, and I¡¯ve seen some inverter rated motors that run up to 400hz. You just need to determine how much over/under speed ratio you want to accomplish the feeds you need, and see if that works for your motor.

Brian Lamb




On Dec 6, 2016, at 7:36 PM, Marlowe McGraw marlomcgraw@... [felder-woodworking] <felder-woodworking@...> wrote:


I am considering replacing an uber complex mechanical variable speed drive (feed system on a Griggio planer) with a VFD.? I already bought a new C faced 3 phase motor and have a drive that will work , but was wondering if it needs to be a motor of any special duty rating, etc.

Marlowe McGraw?



 

Thanks Brian,
I will likely feed at the same range as original.? Should be the highest speed when I couple the motor to the gearbox?

Marlowe

On Tue, Dec 6, 2016 at 9:05 PM, Brian Lamb blamb11@... [felder-woodworking] <felder-woodworking@...> wrote:
?

Pretty much any current manufacture motor will run on a VFD, the trick is how much above and below the standard 60hz you can run. I would say from 30hz to 120hz on most motors. My CNC mill runs from 10hz or so on the low end to 200 hz on the high, and I¡¯ve seen some inverter rated motors that run up to 400hz. You just need to determine how much over/under speed ratio you want to accomplish the feeds you need, and see if that works for your motor.


Brian Lamb




On Dec 6, 2016, at 7:36 PM, Marlowe McGraw marlomcgraw@... [felder-woodworking] <felder-woodworking@yahoogroups.com> wrote:


I am considering replacing an uber complex mechanical variable speed drive (feed system on a Griggio planer) with a VFD.? I already bought a new C faced 3 phase motor and have a drive that will work , but was wondering if it needs to be a motor of any special duty rating, etc.

Marlowe McGraw?