CAD CAM EDM DRO - Yahoo Group Archive

Power supply softstarts

on 2005-04-04 12:24:47 UTC
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

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