Yahoo Groups archive

Lpc2000

Index last updated: 2026-04-28 23:31 UTC

Message

Re: [lpc2000] EMI - was Re: lpc2138 5V tolerant is not really tolerant!

2006-01-28 by Rob Jansen

Charles,

thanks for your elaborating answer.
I know, stuff like motor control can induce big problems in a system. I've
seen spontaneous system resets when driving even 'small' motors that are
used in washing machines (200V DC motor).
I have also worked with 100V 3 phase motors that controlled an A0 size
plotter (a surplus device we got almost 30 years ago - no integrated
circuits yet ...)  with a lot of these 'strange' solution I did not
understand back then.

Even after 30 years I'm still learning.

Rob

>   We design allot of motion control and there is plenty of noise that
> is generated that we have to take into account. One saving grace is
> the CE approved power supply. We ran experiments with one at an
> approved lab and found that it eliminates all the conducted emmissions
> from the system if one is there. That saved us from having to put
> chokes and such on our boards since we could be pumping as much as 12
> amps through the board at any one time.
>
> regards,
> Charles

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.