Re: [CAD_CAM_EDM_DRO] Re: 201 Drivers and 42 Motors

Mariss,
I think this is a good move. There is definitely a demand for these higher
voltage drives as indicated in the responses.

I used the IRF840's due to getting a deal on them, they are intended for a
smaller
drive for sure. I finally used IGBT's in the final design for a demo.

Also, if using PWM, you will get inductive spikes at turnoff no matter how
good the design!
How you supress/control them is the key to protecting the devices.

-Lee



At 04:35 AM 9/28/00 -0000, you wrote:

>John,
>
>Good evening. It just so happens Darrell and I had an extended phone
>conversation this evening on this very subject where he made a very
>persuasive case for a 160-180VDC drive. So much so that I will be
>seriously investigating the feasabilty of building such a drive. I've
>asked Darrell to give me input for what is required regarding
>existing power supplies and motors. Any other comments and
>suggestions from others as well would be welcome as well.
>
>Mariss
>