CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] current rating of transformers

Posted by Jon Elson
on 2004-10-24 09:25:05 UTC
turbulatordude wrote:

>Hi,
>
>If I have a 24 volt, (12V-0-12) center tap transformer like the MPJA
>unit.
>http://www.mpja.com/productview.asp?product=7846+TR
>
>And isolate the center tap I get 24 volts.
>
>But when rectified, doesn't the current change also ?
>
>There is a note in the catalogue that for this wiring the amps are
>1.8x
>
>The catalogue refers to required ouput amps
>
>
>full wave bridge cap input filter 1.8x to required output amps
>full wave choke input filter = required output amps
>full wave, center tap, cap = 1.2x roa
>full wave, center tap, choke = 0.7x roa
>
>
Using the full winding means current flows in both ends of the winding
all the time. So, the current rating must go down. With full-wave
center tap, each half of the winding gets a rest 50% of the time, so
current rating goes up. I guess what they are saying here is that you
take the load current and multiply by these factors to get the rating
of the transformer.

Jon

Discussion Thread

turbulatordude 2004-10-24 08:57:44 UTC current rating of transformers Jon Elson 2004-10-24 09:25:05 UTC Re: [CAD_CAM_EDM_DRO] current rating of transformers turbulatordude 2004-10-24 09:42:30 UTC Re: current rating of transformers Andy Wander 2004-10-24 11:14:03 UTC RE: [CAD_CAM_EDM_DRO] current rating of transformers Jon Elson 2004-10-24 20:03:42 UTC Re: [CAD_CAM_EDM_DRO] Re: current rating of transformers Jon Elson 2004-10-24 20:28:24 UTC Re: [CAD_CAM_EDM_DRO] current rating of transformers learnningstuff 2004-10-24 23:05:59 UTC Re: current rating of transformers turbulatordude 2004-10-24 23:30:59 UTC Re: current rating of transformers Andy Wander 2004-10-25 05:12:26 UTC RE: [CAD_CAM_EDM_DRO] current rating of transformers Andy Wander 2004-10-25 05:22:39 UTC RE: [CAD_CAM_EDM_DRO] Re: current rating of transformers turbulatordude 2004-10-25 09:47:02 UTC Re: current rating of transformers Jon Elson 2004-10-25 10:15:38 UTC Re: [CAD_CAM_EDM_DRO] current rating of transformers Andy Wander 2004-10-25 10:45:06 UTC RE: [CAD_CAM_EDM_DRO] current rating of transformers turbulatordude 2004-10-25 11:28:34 UTC Re: current rating of transformers John Dammeyer 2004-10-25 11:46:56 UTC RE: [CAD_CAM_EDM_DRO] current rating of transformers kmslinda 2004-10-25 14:40:53 UTC Re: current rating of transformers Jon Elson 2004-10-25 22:59:28 UTC Re: [CAD_CAM_EDM_DRO] Re: current rating of transformers turbulatordude 2004-10-25 23:27:20 UTC Re: current rating of transformers caudlet 2004-10-26 07:02:12 UTC Re: current rating of transformers Fred Smith 2004-10-26 07:19:04 UTC Re: current rating of transformers Jon Elson 2004-10-26 09:18:02 UTC Re: [CAD_CAM_EDM_DRO] Re: current rating of transformers Stephen Wille Padnos 2004-10-26 11:47:51 UTC Re: [CAD_CAM_EDM_DRO] Re: current rating of transformers Bloy2004 2004-10-26 14:51:36 UTC Re: current rating of transformers Bloy2004 2004-10-26 18:57:13 UTC Re: current rating of transformers Jon Elson 2004-10-26 23:07:20 UTC Re: [CAD_CAM_EDM_DRO] Re: current rating of transformers Bloy2004 2004-10-27 06:14:34 UTC Re: current rating of transformers Roy J. Tellason 2004-10-27 10:11:48 UTC Re: [CAD_CAM_EDM_DRO] Re: current rating of transformers Jon Elson 2004-10-27 10:36:31 UTC Re: [CAD_CAM_EDM_DRO] Re: current rating of transformers