Re: [CAD_CAM_EDM_DRO] Variable Transformer
Posted by
Jon Elson
on 2005-06-29 18:36:31 UTC
Andy Wander wrote:
no terminal
of the capacitor can be grounded. During the negative cycle of the
power mains
hot lead, the minus side of the cap will be essentially connected to the
hot wire,
so obviously you can't ground this.
There isn't (much) AC voltage ACROSS the CAP, but the cap floats between the
negative peak and positive peak of the mains voltage, depending on the cycle
of the AC voltage at that moment. When the line voltage is near the +
or - peak,
then both cap terminals are connected to the mains by two of the diodes
becoming
forward biased, and the cap receives current from the line. This is
real hard to describe
in words. I could draw a couple of pictures that would explain it
pretty well.
Jon
>Jon:If you use a variac directly from the power mains to a bridge rectifier,
>
>Thanks, this is very interesting.
>
>Can you tell me why there is an AC component across the cap when the "-" is
>not grounded, and not when it is? I have seeen this, but am not sure why it
>happens.
>
>
no terminal
of the capacitor can be grounded. During the negative cycle of the
power mains
hot lead, the minus side of the cap will be essentially connected to the
hot wire,
so obviously you can't ground this.
There isn't (much) AC voltage ACROSS the CAP, but the cap floats between the
negative peak and positive peak of the mains voltage, depending on the cycle
of the AC voltage at that moment. When the line voltage is near the +
or - peak,
then both cap terminals are connected to the mains by two of the diodes
becoming
forward biased, and the cap receives current from the line. This is
real hard to describe
in words. I could draw a couple of pictures that would explain it
pretty well.
Jon
Discussion Thread
v_bps
2005-06-28 13:50:55 UTC
Variable Transformer
JanRwl@A...
2005-06-28 14:04:55 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Michael Larson
2005-06-28 14:07:44 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Bengt Sjölund
2005-06-28 14:09:54 UTC
Re: Variable Transformer
Alan Marconett
2005-06-28 14:26:33 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
v_bps
2005-06-28 14:28:43 UTC
Re: Variable Transformer
Tony Jeffree
2005-06-28 14:30:03 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Dave Fisher
2005-06-28 14:34:13 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-28 14:59:58 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Carl Mikkelsen
2005-06-28 15:48:30 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Tony Jeffree
2005-06-28 15:50:43 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-28 17:15:12 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Michael Larson
2005-06-28 17:39:41 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-28 18:26:25 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
bank haam
2005-06-28 18:33:32 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
JanRwl@A...
2005-06-28 21:52:00 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Tom Harrison
2005-06-28 23:24:46 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
caedave
2005-06-29 01:32:21 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-29 04:19:15 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-29 04:22:38 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-29 04:27:10 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Tony Jeffree
2005-06-29 05:08:03 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-29 05:14:13 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
John Meissner
2005-06-29 05:18:33 UTC
Re: Variable Transformer
turbulatordude
2005-06-29 05:30:01 UTC
Re: Variable Transformer
Andy Wander
2005-06-29 05:30:44 UTC
RE: [CAD_CAM_EDM_DRO] Re: Variable Transformer
Andy Wander
2005-06-29 05:33:37 UTC
RE: [CAD_CAM_EDM_DRO] Re: Variable Transformer
turbulatordude
2005-06-29 05:49:43 UTC
Re: Variable Transformer
Andy Wander
2005-06-29 05:55:45 UTC
RE: [CAD_CAM_EDM_DRO] Re: Variable Transformer
jkbrennan
2005-06-29 06:41:20 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-29 06:54:12 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Hugh Prescott
2005-06-29 07:36:58 UTC
Re: [CAD_CAM_EDM_DRO] Re: Variable Transformer
Andy Wander
2005-06-29 07:54:48 UTC
RE: [CAD_CAM_EDM_DRO] Re: Variable Transformer
jkbrennan
2005-06-29 08:26:59 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Vince Negrete
2005-06-29 08:49:16 UTC
Re: [CAD_CAM_EDM_DRO] Re: Variable Transformer
Alan Marconett
2005-06-29 09:13:47 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-29 09:26:57 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-29 09:29:25 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Alan Marconett
2005-06-29 10:02:35 UTC
[Spam] RE: [CAD_CAM_EDM_DRO] Variable Transformer
Jack
2005-06-29 10:10:34 UTC
Re: [Spam] RE: [CAD_CAM_EDM_DRO] Variable Transformer
Jon Elson
2005-06-29 10:36:14 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-29 10:47:32 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
George Taylor, IV
2005-06-29 10:55:13 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Stephen Wille Padnos
2005-06-29 12:05:49 UTC
Re: [Spam] RE: [CAD_CAM_EDM_DRO] Variable Transformer
Roy J. Tellason
2005-06-29 13:20:12 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Jon Elson
2005-06-29 18:36:31 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Jon Elson
2005-06-29 18:37:32 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-29 19:36:51 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Raymond Heckert
2005-06-29 20:01:38 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-30 04:47:46 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Doug M
2005-06-30 08:49:28 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-06-30 08:54:30 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
JanRwl@A...
2005-06-30 13:07:17 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Hugh Prescott
2005-06-30 13:32:23 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Raymond Heckert
2005-07-01 20:08:45 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer
Andy Wander
2005-07-02 06:27:31 UTC
RE: [CAD_CAM_EDM_DRO] Variable Transformer
Raymond Heckert
2005-07-03 16:52:35 UTC
Re: [CAD_CAM_EDM_DRO] Variable Transformer