------ Original Message ------ From: "andy pugh" <[email protected]> To: "Marius Liebenberg" <[email protected]>; "Enhanced Machine Controller (EMC)" <[email protected]> Sent: 2015-09-18 13:05:15 Subject: Re: [Emc-users] How far can I over clock a VFD
>On 18 September 2015 at 10:38, Marius Liebenberg ><[email protected]> wrote: > >> My question is, what is the max that I can over clock the VFD / >>motor? > >If there is a 3000 rpm version of the same motor then you can be >confident that there is no mechanical reason that the motor can't go >that fast. > >So, then you start getting into questions of stator inductance, and >whether there is enough field current at that frequency. I guess the best will be to test the motor under load. I mostly cut aluminium and plastics with the mill. It is not a decent piece of metal so light duty stuff only. The reason I want the extra speed is so that I can cut the aluminium at a better feed rate. Currently at 1100 rpm it is unbearable. I changed the drive pulley to be 1:1 with a slight reduction to the final drive pulley. Will there be some heat build-up at free running if the field current is not sufficient? I could run it for a long period and check what happens, if that has any scientific value? > >-- >atp >If you can't fix it, you don't own it. >http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
