On 09/18/2015 04:38 AM, Marius Liebenberg wrote:
> I have just fitted a replacement motor to my mill as the old one finally
> gave up the ghost. The motor does 1450rpm at 50Hz. The old motor was a
> 1.1Kw motor and the new one is a 2.2Kw. I want to over clock the VFD to
> 105Hz in order to get around 3000rpm. I have tested the motor at that
> and it seems happy in the short term.
> My question is, what is the max that I can over clock the VFD / motor?
>
>

I have been running a 1725 RPM at 60 HZ motor at 150Hz on my CHNC 
Hardinge. Sometimes for days at a time.

Ed.


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