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How 'bout converting your 250V sq-wave into DC, then generate the sine wave. I've seen HUGE UPS systems that do something similar, although at a fixed frequency.
how do i limit voltage
This makes sense. Switch 3S4 appears to be a center-off type switch which isn't clear in the schematic.
From what I know about the whole system now, I still think that part of the problem is related to the pseudo 3rd phase from the static 3ph convertor. Have you had a...
limit output voltage
The schematic is VERY helpful.
The power supply is drawn a little strange, but from your previous pictures I can clearly see the large electrolytic cap in the power supply.
I see that the relay (3K1) is driven by a completly different source, so it should work with the...
how to limit the voltage
Don't know. I would guess not though. You could match 2 of the 3 phases, but I would be worried about the psuedo 3rd phase. I guess I'm chicken 'cause I wouldn't try it unless the manufacturer said it would work. Let me know how it goes if you decide to try it.
I did...
voltage limit
It sounds like you may need to keep the transformer unless the solenoid will also run off 24Vdc. Is the noid controlled by a mechanical switch or is it controlled by other electronics?
Good.
Do you have any other equipment connected to the phase convertor? If so, could...
t8l250v fuse
Sounds that way (I'm assuming that there is still no load). One thing that can happen is that the large electrolytic capacitor starts to fail and then your DVM will read a lower DC voltage, but isn't the lower value (30 Vdc) the correct value? I'm also assuming that the...
how to limit output voltage
You stated:
245Vac is high for 3 phase in the USA. It should be closer to 208Vac from phase to phase. There is no DC component on the output side of the transformer, did you mean 34Vac? A transformer has Vac in (primary side) and Vac out (secondary side). The...
limit voltage
The 240Vac to 24Vdc power supply that the machine uses is one of the simplest made. As the mains voltage varies so will the DC voltage output. As mister_rf already stated, the output voltage will also vary with motor load.
Here are a couple approaches you can take:
Add a crowbar...
Re: smoothing filter
Look at this:
https://www.dspguide.com/pdfbook.htm
See chapter 19 (single pole 4-stage)
There may be better filters for image processing though.
If you are looking for processing power vs. power consumption the MSP430 series is the best I've used. There are other drawbacks to using them though...
I'm not real familiar with PICbasic, but I've read in a different forum:
I also see that you can disable the automatically generated watchdog reset code:
If you disable the auto reset then you will need to do it yourself.
The above quotes were taken from...
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