Re: What size capacitor should I use?
Posted by
turbulatordude
on 2005-01-26 09:58:26 UTC
--- In CAD_CAM_EDM_DRO@yahoogroups.com, "A. G. Eckstein"
<a_eckstein@b...> wrote:
70 volts, 12 amps. one power supply ?
"..So in your case, I would look at 80000*12/70 or 13,714µF and round
up to the next highest value with a voltage rating of at least
100V ...
Of course that is 80,000 for 60hz and 100,000 for 50 hz.
Where did multiple supplies and three times the power come from in
this thread ?
As Caudlet mentioned, most power supplies or way over sized for one
reason or another. Mine because I got the works complete and never
changed parts out.
But, for a Gecko, Mariss (the manufacturer) recomends sizing the
powr supply to about 66% of nameplate. So, one questions goes not
to power supply but motors. What is the total of the motors amps ?
If your power supply can handle 12 amps at 70 volts, but your motors
total 3 amps, then you need to take 60% of 3 amps (roughly 2 amps)
and then work the cap sizing by that. All the rest of the power
supply is 'reserve'
Also, there have been some recomendations on using multiple caps.
What is the reasoning behind that ? size ? effency ? cost ? some
other engineering reason ? or is that just a old wives tale ?
If the motors needs are 12 amps and the calculation shows 13kuF, and
a 15kuF is available, what possible benifit is gained by multiple
caps ?
Dave
<a_eckstein@b...> wrote:
> Ron,1 power
> I would base this on "per power supply". In other words if you have
> supply providing the necessary voltage/amps, then it would be one(or more
> in parallel) to obtain the necessary capacitance. If you have 3power
> supplies each rated at this voltage/amps, then yes you need 3 caps.at
>
> The site that I mentioned earlier does not have a single cap rated
> 45KµF, so your best bet is as you have done and parallel the 315KµF caps
> which will give you the same total capacitance.hunh ?????
>
70 volts, 12 amps. one power supply ?
"..So in your case, I would look at 80000*12/70 or 13,714µF and round
up to the next highest value with a voltage rating of at least
100V ...
Of course that is 80,000 for 60hz and 100,000 for 50 hz.
Where did multiple supplies and three times the power come from in
this thread ?
As Caudlet mentioned, most power supplies or way over sized for one
reason or another. Mine because I got the works complete and never
changed parts out.
But, for a Gecko, Mariss (the manufacturer) recomends sizing the
powr supply to about 66% of nameplate. So, one questions goes not
to power supply but motors. What is the total of the motors amps ?
If your power supply can handle 12 amps at 70 volts, but your motors
total 3 amps, then you need to take 60% of 3 amps (roughly 2 amps)
and then work the cap sizing by that. All the rest of the power
supply is 'reserve'
Also, there have been some recomendations on using multiple caps.
What is the reasoning behind that ? size ? effency ? cost ? some
other engineering reason ? or is that just a old wives tale ?
If the motors needs are 12 amps and the calculation shows 13kuF, and
a 15kuF is available, what possible benifit is gained by multiple
caps ?
Dave
Discussion Thread
rllalonde2000
2005-01-26 04:28:01 UTC
What size capacitor should I use?
A. G. Eckstein
2005-01-26 04:58:31 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
Simon Arthur
2005-01-26 05:38:23 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
R Rogers
2005-01-26 06:56:31 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
Terrenoire, Adrien L
2005-01-26 07:00:14 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
Andy Wander
2005-01-26 07:01:23 UTC
RE: [CAD_CAM_EDM_DRO] What size capacitor should I use?
turbulatordude
2005-01-26 07:07:50 UTC
Re: What size capacitor should I use? - voltage ?
A. G. Eckstein
2005-01-26 07:13:30 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
caudlet
2005-01-26 08:00:51 UTC
Re: What size capacitor should I use?
Bengt
2005-01-26 09:11:26 UTC
Re: What size capacitor should I use?
Jon Elson
2005-01-26 09:28:27 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
Roy J. Tellason
2005-01-26 09:44:34 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
turbulatordude
2005-01-26 09:58:26 UTC
Re: What size capacitor should I use?
Andy Wander
2005-01-26 10:19:07 UTC
RE: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
caudlet
2005-01-26 11:29:56 UTC
Re: What size capacitor should I use?
Roy J. Tellason
2005-01-26 11:41:56 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
Rob Polley
2005-01-26 11:43:12 UTC
Looking for advice
Dan Mauch
2005-01-26 12:18:29 UTC
Re: [CAD_CAM_EDM_DRO] Looking for advice
Codesuidae
2005-01-26 12:34:15 UTC
Re: [CAD_CAM_EDM_DRO] Looking for advice
victorlorenzo@y...
2005-01-26 12:55:47 UTC
Re: Looking for advice
Stephen Wille Padnos
2005-01-26 13:38:53 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
John
2005-01-26 14:04:29 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
Simon Arthur
2005-01-26 14:09:40 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
erie
2005-01-26 14:33:11 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
Stephen Wille Padnos
2005-01-26 14:37:28 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
R Rogers
2005-01-26 14:56:53 UTC
[CAD_CAM_EDM_DRO] Toroidal transformer ratings?? Amps? Kv? Kva?
JanRwl@A...
2005-01-26 15:04:42 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
Les Newell
2005-01-26 15:05:07 UTC
Re: [CAD_CAM_EDM_DRO] Toroidal transformer ratings?? Amps? Kv? Kva?
cnc_4_me
2005-01-26 15:08:24 UTC
Re: What size capacitor should I use?
David Paulson
2005-01-26 15:10:21 UTC
Re: [CAD_CAM_EDM_DRO] Toroidal transformer ratings?? Amps? Kv? Kva?
cnc_4_me
2005-01-26 15:23:15 UTC
Re: Toroidal transformer ratings?? Amps? Kv? Kva?
JanRwl@A...
2005-01-26 15:40:19 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
R Rogers
2005-01-26 15:49:48 UTC
Re: [CAD_CAM_EDM_DRO] Toroidal transformer ratings?? What after being rectified?
cnc_4_me
2005-01-26 15:55:58 UTC
Re: What size capacitor should I use?
cnc_4_me
2005-01-26 16:14:14 UTC
Re: Toroidal transformer ratings?? What after being rectified?
R Rogers
2005-01-26 16:18:19 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?sizing supply
Ron Ginger
2005-01-26 17:01:36 UTC
Re: Looking for advice
polaraligned
2005-01-26 17:09:38 UTC
What size capacitor should I use?
Polaraligned
2005-01-26 17:25:09 UTC
Re: Toroidal transformer ratings?? Amps? Kv? Kva?
R Rogers
2005-01-26 17:29:00 UTC
Re: [CAD_CAM_EDM_DRO] Re: Looking for advice
cnc_4_me
2005-01-26 18:05:05 UTC
Re: What size capacitor should I use?
victorlorenzo@y...
2005-01-26 18:19:00 UTC
Re: Looking for advice
codeSuidae
2005-01-26 18:32:59 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
cnc_4_me
2005-01-26 18:54:06 UTC
Re: What size capacitor should I use?
Ken Langston
2005-01-26 18:56:05 UTC
Re: [CAD_CAM_EDM_DRO] Re: Toroidal transformer ratings?? Amps? Kv? Kva?
cnc_4_me
2005-01-26 19:01:47 UTC
Re: Toroidal transformer ratings?? Amps? Kv? Kva?
Rob Polley
2005-01-26 19:24:26 UTC
Re: [CAD_CAM_EDM_DRO] Re: Looking for advice
codeSuidae
2005-01-26 19:26:51 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
cnc_4_me
2005-01-26 19:35:49 UTC
Re: Looking for advice
bobmcknight@c...
2005-01-26 19:37:07 UTC
Re: [CAD_CAM_EDM_DRO] Re: Toroidal transformer ratings?? Amps? Kv? Kva?
bobmcknight@c...
2005-01-26 19:37:08 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
cnc_4_me
2005-01-26 19:54:55 UTC
Re: What size capacitor should I use?
turbulatordude
2005-01-26 19:57:22 UTC
Re: What size capacitor should I use? resistors....
cnc_4_me
2005-01-26 20:08:00 UTC
Re: What size capacitor should I use? resistors....
JanRwl@A...
2005-01-26 21:34:22 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
JanRwl@A...
2005-01-26 21:43:19 UTC
Re: [CAD_CAM_EDM_DRO] Toroidal transformer ratings?? Amps? Kv? Kva?
codeSuidae
2005-01-26 21:56:30 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
Jon Elson
2005-01-26 21:56:33 UTC
Re: [CAD_CAM_EDM_DRO] Toroidal transformer ratings?? What after being rectified?
Mariss Freimanis
2005-01-26 21:58:04 UTC
Re: What size capacitor should I use? resistors....
Jon Elson
2005-01-26 22:08:03 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use?
JanRwl@A...
2005-01-26 22:09:14 UTC
Re: [CAD_CAM_EDM_DRO] Re: Looking for advice
Jon Elson
2005-01-26 22:22:35 UTC
Re: [CAD_CAM_EDM_DRO] Re: Toroidal transformer ratings?? Amps? Kv? Kva?
Jon Elson
2005-01-26 22:29:43 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use? resistors....
Jon Elson
2005-01-26 22:33:41 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use? resistors....
Simon Arthur
2005-01-27 00:01:53 UTC
Re: [CAD_CAM_EDM_DRO] What size capacitor should I use?
Polaraligned
2005-01-27 04:15:31 UTC
Re: What size capacitor should I use?
Polaraligned
2005-01-27 04:29:29 UTC
Re: Toroidal transformer ratings?? What after being rectified?
turbulatordude
2005-01-27 06:26:30 UTC
Re: What size capacitor should I use? resistor or not ??
turbulatordude
2005-01-27 06:45:41 UTC
Re: Toroidal transformer ratings?? What after being rectified?
Leslie Watts
2005-01-27 07:04:52 UTC
RE: [CAD_CAM_EDM_DRO] Re: Toroidal transformer ratings?? What after being rectified?
Jon Elson
2005-01-27 10:30:37 UTC
Re: [CAD_CAM_EDM_DRO] Re: Toroidal transformer ratings?? What after being rectified?
Jon Elson
2005-01-27 10:40:20 UTC
Re: [CAD_CAM_EDM_DRO] Re: What size capacitor should I use? resistor or not ??
cnc_4_me
2005-01-27 10:47:17 UTC
Re: Toroidal transformer ratings?? What after being rectified?
Les Newell
2005-01-27 12:49:45 UTC
Re: [CAD_CAM_EDM_DRO] Re: Toroidal transformer ratings?? What after being rectified?
Polaraligned
2005-01-27 13:39:18 UTC
Re: Toroidal transformer ratings?? What after being rectified?
Stephen Wille Padnos
2005-01-27 14:44:25 UTC
Re: [CAD_CAM_EDM_DRO] Re: Toroidal transformer ratings?? What after being rectified?
Polaraligned
2005-01-27 18:13:16 UTC
Re: Toroidal transformer ratings?? What after being rectified?
Steve Stallings
2005-01-27 18:18:44 UTC
Re: Toroidal transformer ratings?? What after being rectified?
Stephen Wille Padnos
2005-01-27 18:28:46 UTC
Re: [CAD_CAM_EDM_DRO] Re: Toroidal transformer ratings?? What after being rectified?
Jon Elson
2005-01-27 21:35:23 UTC
Re: [CAD_CAM_EDM_DRO] Re: Toroidal transformer ratings?? What after being rectified?
Kevin Martin
2005-01-28 05:32:28 UTC
RE: [CAD_CAM_EDM_DRO] Re: Toroidal transformer ratings?? What after being rectified?
m0nkey0ne
2005-01-28 11:22:47 UTC
Re: Toroidal transformer ratings?? What after being rectified?
Mcginnis, Darrell S
2005-03-22 14:43:20 UTC
RE: [CAD_CAM_EDM_DRO] What size capacitor should I use?