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Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
Vale wrote ...
Night shot would have been awesome, looks cool anyway.
Our main priority is also finding a large place indoors where we are in much better control of everything. We just wanted to get a video of sparks of atleast 3 meters and use that with a few contacts we have to show off what kind of equipment it is and see if we can find a mutual advantage of us getting housing and they can use it in education, still operated by me of course.
Only time will tell :) Other option is that my little family and I move to a house with a big work shop, which is also within a years plan or so.
I have cut out the bonding wires to the RTC circuit of the CM600-24FA IGBT bricks, which we thought could be one of the reasons that we were not able to trip the 1500 A OCD setting. While it might have limited the operation a little bit, it was nowhere near hindering performance, this coil is just so high impedance that it runs long on-times instead of high peak currents.
Did you try detuning the coil somewhat? That should shift the primary current max if limited by secondary loading a bit up. I believe lowering primary res frequency by increasing primary inductance is preferable to adding primary capacitance.
Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
Uspring wrote ...
Mads wrote:
I have cut out the bonding wires to the RTC circuit of the CM600-24FA IGBT bricks, which we thought could be one of the reasons that we were not able to trip the 1500 A OCD setting. While it might have limited the operation a little bit, it was nowhere near hindering performance, this coil is just so high impedance that it runs long on-times instead of high peak currents.
Did you try detuning the coil somewhat? That should shift the primary current max if limited by secondary loading a bit up. I believe lowering primary res frequency by increasing primary inductance is preferable to adding primary capacitance.
As it is tapped at exactly where javatc predicts, there certainly is room for lowering the primary frequency.
There are so many things we want to try, experiment with, measure etc, but we have had so bad luck in getting time to run it, this time we was shut down by a neighbor noise complaint after 20 minutes of testing. So we are now looking for a new place to run it and is on break until we have that :(
I met a guy showing a rather big coil at the Nottingham Gaussfest. Inside the hall it was permanently arcing to the walls and ceiling. So I asked him, how long the sparks would be if it were run outside. He told me, he doesn't know. He never had an opportunity to do this.
We should collect some money to offer a prize to the inventor of a TC muffler.
Registered Member #205
Joined: Sat Feb 18 2006, 11:59AM
Location: Skørping, Denmark
Posts: 741
Congratulations on this test run. Try to get access to an electrical outlet in an industrial area, where neighbours is not a problem. Here at 56 degrees north, this time of the year is perfect for outside tuning, since darkness falls at 20 hours. Better would be an old hangar, but that is hard to come by. We need 6-7 meters to the ceiling.
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Kaizer DRSSTC III
