Re: [CAD_CAM_EDM_DRO] Re: Power supply surge above the Va rating?

Yes, it happened one afternoon and not since as far as I know. I put the 100volt 1000uF caps at each drive to protect them, machine runs much better. I'm trying to size a transformer for a new control and curious about surge. Will demand from the motors cause the transformer to surge above the Va rating? With a proportional DC voltage drop of course.
Ron

cnc_4_me <cnc4me@...> wrote:


Was it you who was telling us you were getting voltage spikes so big
you heard a cracking sound in your transformer?

Wally


--- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers
wrote:

>
>
> A 55 volt secondary, 800 va toroid transformer should yield an 14.5

amp output. Then when rectified It should be 78 volts DC at 8 amps
max. Could the current surge above this value under a higher demand.
And if so, how much? How would it effect the DC voltage?

>
>
>
> Ron
>
>
>
> [Non-text portions of this message have been removed]

Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com

Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner


Yahoo! Groups Links









[Non-text portions of this message have been removed]