Very cool to see you back at the Tesla coil stuff. I’m ordering some parts as I write this. Hopefully gonna make my first full bridge coil soon. Great work as always, can’t wait to see what this turns into
Good luck. I find full bridges to be a lot easier to comfortably build after getting some kind of grasp over gate drive requirements per given switches combined with the frequency and on times, and just treating it like two half bridges with the drains and sources tied together and the load in between. Using a single GDT to drive them all seems to make it easy. I've got some more full bridge setups I want to try using 'dead' 3 phase IGBT modules. If it's a lucky failure then one might not even need to modify the internal connections and it will basically already be wired as a full bridge, but have 2 extra switches where hopefully one of those was the failed one (making the part useless for its original application). If one could locate and cut a deal with some local company that works in repairing industrial equipment then they might have buttloads of modules that are useless to them but still contain perfectly functioning full bridges.
@@rodriguezfranco3839 I will definitely upload some stuff when I can… but college is currently consuming most of my time so once that’s done with I’ll try some more stuff out and make videos on it.
@@quantumlab9130 We actually had a pile of them at work and I didn't think I could use them. Then one day I looked closer at the internal wiring and realized most of them are basically the 3 half bridges that are going to just have 1 or 2 of the switches blown inside. It's kind of like the brick I'm using for the buck converter. It comes wired as a half bridge internally but of course when one switch fails it's basically trash. Unless of course you have some use for a single switch in a brick package.
Great , arcs look pretty sick and the qcw is for sure working , it is crazy that you are powering everything from batteries , I been busy this week but I am starting to slowly work on a setup that I would be able to qcw ,I want to put a lower Frequency secondary on the pll coil (wich would also help my gate driver survive till I change it for a better one) . I feel like if I can get my bigger secondary to spit some nice plasma it will also spit nice arcs when ramped , for the buck switch I got a irfp260 and I need to get some kind of driver maybe totem pole bjts Pd :What are your thoughts on those ballons / objects shooted down ?
This testing kind of let me know how it would go with much smaller components and a small coil. Seems like it would work fine and be much easier to build since you won't need an inductor core that can handle insane currents and won't saturate. I plan on grabbing another arduino maybe a smaller one and building a second smaller setup for smaller coils. This bigger one will probably have to wait for my large toroid to arrive before I can go much further with it. Killing a 60N65 kind of set me back because I've hardly ever killed those things on any circuit. No idea about the balloons either. That stuff is all just a distraction to me. Political posturing etc.. I mean even if it's spy balloons, why the hell would China or anyone else fly balloons over US soil when we all have hundreds upon hundreds of spy satellites. Such things being so quickly shot down over Alaska sort of just reminds us what must be going on over there in that vast land mass.
It's basically just a normal buck converter circuit (made to handle high peak currents) that is controlled with a ramp generating circuit. I used Finn Hammer's Arduino code for the ramp generator that he posted at highvoltageforum.net/index.php?topic=844.0 . So you treat it similarly to making a mains ramped coil which uses no DC smoothing on the bus and relies on the rising ramped voltage of the mains sine wave. Instead of feeding it a mains ramp though, you feed it a buck modulated ramp where you can cater the ramp amplitude and on time etc.. So basically the coil is running in bursts from the reservoir of a large DC capacitance on the buck converter, and as it drains down it is outputting a voltage which starts at close to 0 and ramps up over a period of some 10-20ms or so. The SSTC is just a regular full bridge that uses PLL feedback.
@@yunshuizhongyi Check out my previous video going over the ramp generator. There is also a schematic but it's pretty straightforward. You hook potentiometers (maybe 10-100K) with one of the outer pins to 5v+ on the Arduino, the other outer pins to GND, and the middle wiper pins to the analog inputs. It will output square waves on pin 11 which will feed the buck converter driver and cause it to generate the ramped output. Pin 5 will output a square wave that serves as an enable pulse that lines up with the pin 11 pulse trains. This is so you have a pulse which tells your SSTC driver to start running at the same time the buck converter is outputting a ramp. There is a more simplified approach which is more easily drawn out for someone to replicate exactly but it's really all about a person just already having a Tesla Coil of some form, then powering that coil with this kind of buck converter control as opposed to AC or flat DC.
Bro, have you given it a trial by using a MOT as your inductor instead of the blue toroidal transformer? I'm busy modifying a beefy single Fet circuit to make it work as a RSSTC by trying to use a MOT. I want you to test that circuit using your arduino. It might work amazingly well.
My bad I've lost track of so many messages lol.. For the past month I've been immersed in radio control stuff trying to set up some RC cars for long range AV transmission etc. I haven't even touched my QCW coil after I got a toroid for it. So far I've found the ramping to be maybe the best way to go about it. It also doesn't really seem to matter the topology used so long as it's unsmoothed at the input. Single fet should work fine but I sort of anticipated wanting a bigger setup either way so I just went ahead and did the double full bridge.
@@spiderspider1384 I'm sure someone has used an mot but I would find that complete Overkill as far as the mass and completely inappropriate as far as the core material. If I recall it's basically just iron or steel with no laminating insulating layers basically meant for 60 hertz. I think yellow powdered iron toroids would be much easier to find and stack. Plus these things are apparently driving Slayer exciters which are single-ended low-power circuits anyway. I think Ms Labs has made the closest thing to what you're describing but he's using a push-pull circuit for the Tesla coil and I'm pretty sure he has some high-frequency ferrite core for the LC inductor
Probably, that inductor is likely causing me a lot of problems that should prevent me from running it at all. Better than stacking the tiny yellow cores I have though.
Very cool to see you back at the Tesla coil stuff. I’m ordering some parts as I write this. Hopefully gonna make my first full bridge coil soon. Great work as always, can’t wait to see what this turns into
Brother you should post some of your projects here , I would like to see some videos !!
Good luck. I find full bridges to be a lot easier to comfortably build after getting some kind of grasp over gate drive requirements per given switches combined with the frequency and on times, and just treating it like two half bridges with the drains and sources tied together and the load in between. Using a single GDT to drive them all seems to make it easy. I've got some more full bridge setups I want to try using 'dead' 3 phase IGBT modules. If it's a lucky failure then one might not even need to modify the internal connections and it will basically already be wired as a full bridge, but have 2 extra switches where hopefully one of those was the failed one (making the part useless for its original application). If one could locate and cut a deal with some local company that works in repairing industrial equipment then they might have buttloads of modules that are useless to them but still contain perfectly functioning full bridges.
@@Magneticitist i like your head about using “dead” IGBT’s and you could definitely be them for cheap if you look long enough.
@@rodriguezfranco3839 I will definitely upload some stuff when I can… but college is currently consuming most of my time so once that’s done with I’ll try some more stuff out and make videos on it.
@@quantumlab9130 We actually had a pile of them at work and I didn't think I could use them. Then one day I looked closer at the internal wiring and realized most of them are basically the 3 half bridges that are going to just have 1 or 2 of the switches blown inside. It's kind of like the brick I'm using for the buck converter. It comes wired as a half bridge internally but of course when one switch fails it's basically trash. Unless of course you have some use for a single switch in a brick package.
Great . Is it working with class-e pll single mosfet ?
No that's just a full bridge PLL
Great , arcs look pretty sick and the qcw is for sure working , it is crazy that you are powering everything from batteries , I been busy this week but I am starting to slowly work on a setup that I would be able to qcw ,I want to put a lower Frequency secondary on the pll coil (wich would also help my gate driver survive till I change it for a better one) . I feel like if I can get my bigger secondary to spit some nice plasma it will also spit nice arcs when ramped , for the buck switch I got a irfp260 and I need to get some kind of driver maybe totem pole bjts
Pd :What are your thoughts on those ballons / objects shooted down ?
This testing kind of let me know how it would go with much smaller components and a small coil. Seems like it would work fine and be much easier to build since you won't need an inductor core that can handle insane currents and won't saturate.
I plan on grabbing another arduino maybe a smaller one and building a second smaller setup for smaller coils. This bigger one will probably have to wait for my large toroid to arrive before I can go much further with it. Killing a 60N65 kind of set me back because I've hardly ever killed those things on any circuit.
No idea about the balloons either. That stuff is all just a distraction to me. Political posturing etc.. I mean even if it's spy balloons, why the hell would China or anyone else fly balloons over US soil when we all have hundreds upon hundreds of spy satellites. Such things being so quickly shot down over Alaska sort of just reminds us what must be going on over there in that vast land mass.
Can you provide the circuit diagram?
Acknowledgement in advance
It's basically just a normal buck converter circuit (made to handle high peak currents) that is controlled with a ramp generating circuit. I used Finn Hammer's Arduino code for the ramp generator that he posted at highvoltageforum.net/index.php?topic=844.0 .
So you treat it similarly to making a mains ramped coil which uses no DC smoothing on the bus and relies on the rising ramped voltage of the mains sine wave. Instead of feeding it a mains ramp though, you feed it a buck modulated ramp where you can cater the ramp amplitude and on time etc..
So basically the coil is running in bursts from the reservoir of a large DC capacitance on the buck converter, and as it drains down it is outputting a voltage which starts at close to 0 and ramps up over a period of some 10-20ms or so. The SSTC is just a regular full bridge that uses PLL feedback.
@@Magneticitist ok
@@yunshuizhongyi Check out my previous video going over the ramp generator. There is also a schematic but it's pretty straightforward. You hook potentiometers (maybe 10-100K) with one of the outer pins to 5v+ on the Arduino, the other outer pins to GND, and the middle wiper pins to the analog inputs. It will output square waves on pin 11 which will feed the buck converter driver and cause it to generate the ramped output. Pin 5 will output a square wave that serves as an enable pulse that lines up with the pin 11 pulse trains. This is so you have a pulse which tells your SSTC driver to start running at the same time the buck converter is outputting a ramp.
There is a more simplified approach which is more easily drawn out for someone to replicate exactly but it's really all about a person just already having a Tesla Coil of some form, then powering that coil with this kind of buck converter control as opposed to AC or flat DC.
@@Magneticitist ok
Bro, have you given it a trial by using a MOT as your inductor instead of the blue toroidal transformer? I'm busy modifying a beefy single Fet circuit to make it work as a RSSTC by trying to use a MOT. I want you to test that circuit using your arduino. It might work amazingly well.
My bad I've lost track of so many messages lol.. For the past month I've been immersed in radio control stuff trying to set up some RC cars for long range AV transmission etc. I haven't even touched my QCW coil after I got a toroid for it.
So far I've found the ramping to be maybe the best way to go about it. It also doesn't really seem to matter the topology used so long as it's unsmoothed at the input. Single fet should work fine but I sort of anticipated wanting a bigger setup either way so I just went ahead and did the double full bridge.
It's OK then.
@@Magneticitistyea, I had the same doubt, would an mot work as the inductor.
@@RAVI171175yea , I had this question as well . Do let me know if it's viable.
@@spiderspider1384 I'm sure someone has used an mot but I would find that complete Overkill as far as the mass and completely inappropriate as far as the core material. If I recall it's basically just iron or steel with no laminating insulating layers basically meant for 60 hertz. I think yellow powdered iron toroids would be much easier to find and stack. Plus these things are apparently driving Slayer exciters which are single-ended low-power circuits anyway. I think Ms Labs has made the closest thing to what you're describing but he's using a push-pull circuit for the Tesla coil and I'm pretty sure he has some high-frequency ferrite core for the LC inductor
Kick back from the inductor killed your 60n65 bro
Probably, that inductor is likely causing me a lot of problems that should prevent me from running it at all. Better than stacking the tiny yellow cores I have though.