@NickAlexeev I just did that. Its 15.68438714135. Not close to the 146 Volts on output. So that doesn't make sense. 123*2=246 then sqrt 246 = 15.68438714135
@W5VO I just realized that part of my experience was with electrical work in robotics. I soldered and bought all of the elements to make our schools team place 3rd in nationals. I did wiring for the battery packs and I did everything I could to make it so they can have the most unbelievably longest running battery. But while still having enough power factor to run.
@W5VO Since I wasn't a part of the team I did under the table deals with them and spent hours after school wiring and testing then repeat.
Some of the things I've had experience with I've forgotten I've had the experience.
@NickAlexeev I just read through it. But it still doesn't answer the problem. The RMS of the DC output is 146 VDC. The RMS of the input is 123 VAC. They are both RMS which means the math is easier. There's no converting.
@NickAlexeev Wait...
@NickAlexeev I thought for a second and did 123*sqrt 2= 173.9482681718. I then thought that number was higher and therefore theres the voltage loss from the 123VAC RMS to 146 VDC RMS. But I then realized they are both RMS values. So that's wrong.
@NickAlexeev And therefore not the right value needed. Since they are both RMS values that also means the RMS output can't be higher than the original RMS value of 123 Volts. Especially if there's only diodes. Therefore only making one electrical conversion. No boosters nor multipliers here.
Sounds like measurement error - the waveform may confuse some meters, as it isn't constant DC, like what they expect.
You should be getting about 174V peaks, but without the capacitor there, it's a really irregular waveform (|sin(x)|). RMS measurements only work if the meter can cope with the non-sinusoidal waveform you fed into it.
@W5VO Ohh! Ok. So then how do I determine the real RMS DC voltage from the output? Is there a formula or reverse engineering from a formula I can do to find it? (Yeah I'm only awake because my brain is still solving problems in my head, but I'm getting somewhat tired now)
@ScientistSmithYT If your meter doesn't properly do RMS, then there's not much you can do to correct it. One way is to get a better meter that does RMS better.
Even there, though, you'll run into trouble. Most meters aren't designed with high frequencies in mind. They have to filter them out. That's OK, but high frequency components are also present in clipped low frequency signals. That leads to inaccuracy in the calculated voltage.
Methinks 'tis time to implement RMS voltage calculation in my oscilloscope camera software.
Hello What, me once again, I'm wondering, I've selected a lot of different components to build a proper Bluetooth speaker I've made some drawing, I wonder if this stackexchange could be use as a validation on, on the component and general design ?
I know this kind of question is kind of open and not all site accept open question
@JRE I mean the meter I used was 100 some bucks. And its a pretty good meter. It literally does everything. Everything to diode testing, HV insulation testing, and down to your generic amps, and volts measurements. Its a very nice meter and is good for most things.
@JRE Is there a formula I could use to make a rough estimate of some sort for the RMS voltage on output?
@ScientistSmithYT The important question for this measurement is whether the meter has "true RMS" measurement capability, and over what frequency range.
@ScientistSmithYT If you have an oscilloscope you can.
Does anybody know what happened to the "Place->Directive->Net Class" command in the Altium 19 schematic editor?
If you have a properly built rectifier bridge, and you know the load and the value of the smoothing capacitor, then there are approximations. I've been searching the site for a good example, but haven't found one yet.
@ScottSeidman Was there a large medical device company (on the scale if Medtronic, or Boston Scientific) which had standardized error codes across lots of their devices?
I remember seeing an IFU (?) long time ago with a lot of standardized error codes. (This was perhaps a decade ago, and it was a PDF scanned from a paper. So it wasn't new even at that time.)
The non-zero rectifier forward voltage in the real circuit should have reduced the RMS voltage, not increased it.
So I think we're back to what you suggested earlier.
WIth limited bandwidth, the meter doesn't see the rectified signal going all the way to 0 V, giving a (erroneous) DC offset, and increasing measured Vrms.
@ThePhoton & @JRE I know the operating frequency range of the input. Its within the range of 53-63 Hz precisely. The input RMS voltage is 123 VAC. Given the frequency range I can start with the maximum possibility of 63 Hz and look at the waveform of that
@JRE The link gives some very great answers until it deals with transformers. I'm connecting the diodes up to the 123 VRMS outlet directly. That was something I forgot to mention. And it should have been mentioned earlier.
Just realized the image had a transformer in it. That's a big opsie on my part. I must have already known it had one in it and forgot about that part. I guess not sleeping effects lots of things.
