Re: [CAD_CAM_EDM_DRO] Power supply softstarts
Posted by
R Rogers
on 2005-04-04 12:40:12 UTC
How about a 110volt 10 amp variac on the primary? Strat the power supply at a low setting then gradually increase it. They can be had pretty inexpensively. With servos, I dont think this is an issue.
Ron
Graham Stabler <eexgs@...> wrote:
I am building a 6 axis system with linear servo motors and have
bought a pair of 500VA transformers which should provide 50v and
sufficient amps for peak acceleration. I have also got a 100,000uF
capacitor for smoothing although I may increase this.
On my previous homebrew power supply I added a softstart that
charged the output capacitors via a resister until they were up to
voltage. The prevents a nasty thud on turning on the supply.
However I have a feeling that with the two transformers in this
supply in parallel I may have more of a problem with the transformer
inrush current which does more than make a thud!
What is the "best" way to produce a soft start on the primary of my
powersupply. Should I just use a contactor, timer and power
resister to provide a current limited supply to the transformer on
power up?
Thanks in advance for any help
Graham
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Ron
Graham Stabler <eexgs@...> wrote:
I am building a 6 axis system with linear servo motors and have
bought a pair of 500VA transformers which should provide 50v and
sufficient amps for peak acceleration. I have also got a 100,000uF
capacitor for smoothing although I may increase this.
On my previous homebrew power supply I added a softstart that
charged the output capacitors via a resister until they were up to
voltage. The prevents a nasty thud on turning on the supply.
However I have a feeling that with the two transformers in this
supply in parallel I may have more of a problem with the transformer
inrush current which does more than make a thud!
What is the "best" way to produce a soft start on the primary of my
powersupply. Should I just use a contactor, timer and power
resister to provide a current limited supply to the transformer on
power up?
Thanks in advance for any help
Graham
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
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List Owner
Yahoo! Groups Links
[Non-text portions of this message have been removed]
Discussion Thread
Graham Stabler
2005-04-04 12:24:47 UTC
Power supply softstarts
R Rogers
2005-04-04 12:40:12 UTC
Re: [CAD_CAM_EDM_DRO] Power supply softstarts
Graham Stabler
2005-04-04 12:56:28 UTC
Re: Power supply softstarts
Alan Rothenbush
2005-04-04 13:45:58 UTC
Re: [CAD_CAM_EDM_DRO] Re: Power supply softstarts
turbulatordude
2005-04-04 14:39:35 UTC
Re: Power supply softstarts
R Rogers
2005-04-04 15:41:15 UTC
Re: [CAD_CAM_EDM_DRO] Re: Power supply softstarts
Graham Stabler
2005-04-04 16:48:19 UTC
Re: Power supply softstarts
turbulatordude
2005-04-04 16:56:44 UTC
Re: Power supply softstarts
Carl Mikkelsen
2005-04-04 17:14:54 UTC
Re: [CAD_CAM_EDM_DRO] Re: Power supply softstarts
David Speck
2005-04-04 21:20:19 UTC
Re: [CAD_CAM_EDM_DRO] Power supply softstarts
Graham Stabler
2005-04-05 02:31:09 UTC
Re: Power supply softstarts
dgoadby
2005-04-05 04:07:24 UTC
Re: Power supply softstarts
Joel Hagen
2005-04-05 05:45:11 UTC
Re: Power supply softstarts
JCullins
2005-04-05 06:09:59 UTC
Re: [CAD_CAM_EDM_DRO] Re: Power supply softstarts
Roy J. Tellason
2005-04-05 06:56:15 UTC
Re: [CAD_CAM_EDM_DRO] Re: Power supply softstarts
turbulatordude
2005-04-05 07:29:24 UTC
Re: Power supply softstarts
turbulatordude
2005-04-05 07:39:51 UTC
Re: Power supply softstarts
Jon Elson
2005-04-05 09:37:24 UTC
Re: [CAD_CAM_EDM_DRO] Re: Power supply softstarts
Alan Rothenbush
2005-04-05 11:06:42 UTC
Re: [CAD_CAM_EDM_DRO] Re: Power supply softstarts
Graham Stabler
2005-04-05 11:15:30 UTC
Re: Power supply softstarts
Jon Elson
2005-04-05 22:00:05 UTC
Re: [CAD_CAM_EDM_DRO] Re: Power supply softstarts
Graham Stabler
2005-04-06 01:30:54 UTC
Re: Power supply softstarts
ajv2803959
2005-04-06 08:41:58 UTC
Re: Power supply softstarts