Re: [CAD_CAM_EDM_DRO] Re: Re: Power Supply

----- Original Message -----
From: "Rose, Gary" <Gary.Rose@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, July 13, 2004 5:31 AM
Subject: [CAD_CAM_EDM_DRO] Re: Re: Power Supply


> Excess current will demag a rotor as well. If you look at the B-H curve
for
> a SmCo or NdFeB magnet, at elevated temperature, the curve develops a
> "knee". This means that if you have too high a current, the magnet
actually
> can be demagnetized. When the current is removed, the strength of the
> magnet is permanently impaired. Usually what happens when you demag a
rotor
> this way is that the motor will run but at nowhere near the power you used
> to get.
>
> Gary
>
>