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I am looking when phase 2 crosses phase 1 and rises 3V above.
The winding is listed as 18VAC RMS 24V peak.
There really is no difference between the 2, but I was instructed to not use a zero cross because the generator (250KVA) is getting smacked with a high current draw every 6 seconds so I...
I am looking to detect a point after a phase crossing. I have 3 phases at 24VAC coming from aux windings on a transformer. I have no neutral or earth reference from these taps. I would like to know when phase 2 crosses phase 1 and there is a 3V difference. I bread boarded a comparator with...
I would prefer a standard full bridge over a PSFB as this is my first higher powered design and I want to keep it as simple as possible. I do need the output to have a quick response, but I am not sure what that speed is yet. I would most likely prototype the supply and add the bucks if needed...
I need to design a power supply that will regulate 35A CC. The proposed input power is 3PH 70VAC 2800ARMS off the secondary off a 480V transformer. I need a little guidance to get on the correct path to base a design. Application is industrial equipment.
I have 2 input power options: Use the...
High current opamps seem to be obsolete. Can you recommend an alternative that is SOIC-8. Component shortages also make sourcing alternates difficult. I do have 20-30 different opamps laying around that I can try if needed. Removing C11-C13 solved the heating and oscillation issue. This circuit...
Thank you for the quick reply. I am not sure why I left out the decoupling caps. If I remove C11 C12 C13, how do I get the earth reference for a single phase? The 60mA RMS is for the L272 opamps in the original design. I will pull those caps and see how it effects the temperature and oscillations.
I am working on reproducing this hobby circuit from zapstudio.com. I wanted to make it surface mount and add some features that I need. I have one of these kits and it works, but the opamps are obsolete and I wanted to make some changes. I rolled a new PCB and it works but the opamps get...
I was able to identify the connector on the opposite side of the cable. So I can now make 50% of the replacement cable. The 12 pin still eludes me.
Molex Pico-SPOX 1.5mm pitch.
87439-0800
The service manual does not list the part numbers for either the plug or the socket. So it is down to...
Last night I found the short that caused this. A 10uF SMD cap was fully shorted. Not sure how the cap outlasted the wires but the problem is solved none the less. Now I just need to rebuild the wire harness and It should be back in service, if I can find the parts.
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