I have a dc power supply, that I need to know the ac ripple on the output. Can anyone help me out on how I do this test? The power supply is 230 volt 3 phase input, 0 to 15 volt DC and 0 to 1000 amps output.I don't know too much about this test, I have a oscilloscope, but not sure how to use it for this test. Thank you
-- AC couple the input of one of the vertical channels to the output of the supply and measure the AC on the output of the supply. That\'ll be the ripple.
Two things .... First, be aware that ripple will change with load current. This may affect how you actually perform the test depending on what you are looking to find out.
Second, are you sure that the power supply output is capable of 1000 Amps .... or is it 1000 milliamps? If it REALLY is going to be providing 1000 Amps then you may have some grounding issues as well as some safety issues.
With "plater" for a name, an email addy of "ccchrome" , and a 230 volt 3 phase input, I'd say it's safe to say he means 1000A...
"Plater"
** A 15,000 watt DC supply is no toy !!Surely the maker specifies the ripple percentage.
How is the output voltage varied - with SCRs ??
** Just connect the scope to the output of the PSU, while in use, PLUS monitor the DC voltage on a normal meter.Then set the scope input to "AC " and adjust the vertical setting to make it easy to see & read the waveform.
Ripple% = the *peak to peak* AC voltage expressed as a percentage of the average DC voltage.
For a standard ( no SCRs, no filtering) 3 phase rectifier, ripple is close to 5%.
........ Phil
On Sat, 08 Jul 2006 03:00:19 GMT, in message , "Rick" scribed:
input, I'd
An excellent deduction, IMO.
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