Re: Coreless DC Motor

George,

Not a good idea for G320 drives.

Coreless motors have very low inductance. This low inductance will
result in a very large 25kHz ripple current current thru the motor
resulting in excessive and possibly destructive motor heating.

Mariss



--- In CAD_CAM_EDM_DRO@yahoogroups.com, "len_tikular" <george@p...>
wrote:

>
> I managed to obtain 3 coreless DC motors. THese are supplied by
> Premotec and are Part No 9904 120 13819. 30VDC nominal 100mNM speed
> 2540 but does have 50:1 gearbox fitted. Nominal current 1 amp.

Torque

> constant is 106 mNm/A and a terminal resistance of 8 Ohms. They

seem

> nice little hefty motors. The gearbox may be discarded if necessary
> (or do I leave it fitted)
>
> Are these suitable for driving my Eagle25 mill conversion ?
> Can they be used with the Gecko 320 drive unit ?
>
> Thanks
>
> George