lithium ion tesla coil?
Chris Cristini, Sun Oct 05 2014, 05:56PMI am working on a small 48V sstc I was just wondering does anyone think a lithium type battery would handle the current draw?
Re: lithium ion tesla coil?
TwirlyWhirly555, Sun Oct 05 2014, 07:15PM
If its a high rated C lithium ion polymer , then It should be fine .
What is the current draw ? are you running CW or interrupted ?
TwirlyWhirly555, Sun Oct 05 2014, 07:15PM
If its a high rated C lithium ion polymer , then It should be fine .
What is the current draw ? are you running CW or interrupted ?
Re: lithium ion tesla coil?
Chris Cristini, Sun Oct 05 2014, 07:25PM
I want to make an interupter for this project and try to put all electronics in its case with batteries and all it is a project I just started after my first post other coils I have started I was never able to finish this one will be the first I am even going to try to put the charger in the case so I can use a normal PSU cord to charge the unit but starting to realize 48 volts worth of batteries will not fit.
]img_20141005_151233.jpg[/file]
]img_20141005_151223.jpg[/file]
Chris Cristini, Sun Oct 05 2014, 07:25PM
I want to make an interupter for this project and try to put all electronics in its case with batteries and all it is a project I just started after my first post other coils I have started I was never able to finish this one will be the first I am even going to try to put the charger in the case so I can use a normal PSU cord to charge the unit but starting to realize 48 volts worth of batteries will not fit.
]img_20141005_151233.jpg[/file]
]img_20141005_151223.jpg[/file]
Re: lithium ion tesla coil?
Jazzman56, Mon Oct 06 2014, 09:37AM
Hi Chris,
48 volts worth of Li-Po cells is achievable (although cell balancing may be an issue), inherently you will have a very small capacity to fit within the constraints of your case. Why not try for a 4 cell pack/brick
and build an inverter ?
Then again an inverter will take up room. You could also just use a Li-po charger from hobby king to charge the Lipo to reduce the amount of electronics :D
Regards,
Jazzman56
Jazzman56, Mon Oct 06 2014, 09:37AM
Hi Chris,
48 volts worth of Li-Po cells is achievable (although cell balancing may be an issue), inherently you will have a very small capacity to fit within the constraints of your case. Why not try for a 4 cell pack/brick
and build an inverter ? Then again an inverter will take up room. You could also just use a Li-po charger from hobby king to charge the Lipo to reduce the amount of electronics :D
Regards,
Jazzman56
Re: lithium ion tesla coil?
Chris Cristini, Mon Oct 06 2014, 12:51PM
I like the idea of a boost converter/inverter but worried about further losses here is some pictures of the secondary
]img_20141005_210259.jpg[/file]
]img_20141005_225603.jpg[/file]
Chris Cristini, Mon Oct 06 2014, 12:51PM
I like the idea of a boost converter/inverter but worried about further losses here is some pictures of the secondary
]img_20141005_210259.jpg[/file]
]img_20141005_225603.jpg[/file]
Re: lithium ion tesla coil?
Sigurthr, Mon Oct 06 2014, 02:28PM
I think Staci Elaan (spelling?) has a lot of experience with lipo powered SSTCs. You can find her videos on YouTube. Afaik she uses buck/boost converters to step up 3S (12.6v) lipos to a more appropriate primary voltage and runs the coils in low rep rate single pulse fashion to achieve high break out performance while keeping averaged current demands moderate for the batteries.
Eg; boost to ~85V and store energy in bus capacitance and then dump in a single bang. Rep rate limited to 5x time constant formed by boost converter impedance and bus capacitance.
I've wanted to do similar for a long time but I have no experience with DIY DC-DC converters.
Sigurthr, Mon Oct 06 2014, 02:28PM
I think Staci Elaan (spelling?) has a lot of experience with lipo powered SSTCs. You can find her videos on YouTube. Afaik she uses buck/boost converters to step up 3S (12.6v) lipos to a more appropriate primary voltage and runs the coils in low rep rate single pulse fashion to achieve high break out performance while keeping averaged current demands moderate for the batteries.
Eg; boost to ~85V and store energy in bus capacitance and then dump in a single bang. Rep rate limited to 5x time constant formed by boost converter impedance and bus capacitance.
I've wanted to do similar for a long time but I have no experience with DIY DC-DC converters.
Re: lithium ion tesla coil?
Steve Conner, Mon Oct 06 2014, 03:05PM
Steve Ward's Tesla gun also uses the LiPo batteries sold for RC model applications. I think he uses about 48V worth and steps it up to 300V with a DC-DC converter. Energy for the burst is stored in a bank of electrolytic caps at this voltage.
Steve Conner, Mon Oct 06 2014, 03:05PM
Steve Ward's Tesla gun also uses the LiPo batteries sold for RC model applications. I think he uses about 48V worth and steps it up to 300V with a DC-DC converter. Energy for the burst is stored in a bank of electrolytic caps at this voltage.
Re: lithium ion tesla coil?
loneoceans, Mon Oct 06 2014, 04:19PM
I think in Steve's 2nd tesla gun and Phillip's tesla gun, they both use something like 10 or so 6S 2.2AH 25-50C (to clarify, I meant 6S not 6C!) Lipos in series for something like around 200+V directly to the inverter and skipping the need for a boost converter. However I think the limitation right now is the small-size enclosure that you have and it might be tricky to fit a suitable battery inside. The modern LiPos though can supply more than enough power for small SSTCs though.
loneoceans, Mon Oct 06 2014, 04:19PM
Steve Conner wrote ...
Steve Ward's Tesla gun also uses the LiPo batteries sold for RC model applications. I think he uses about 48V worth and steps it up to 300V with a DC-DC converter. Energy for the burst is stored in a bank of electrolytic caps at this voltage.
Steve Ward's Tesla gun also uses the LiPo batteries sold for RC model applications. I think he uses about 48V worth and steps it up to 300V with a DC-DC converter. Energy for the burst is stored in a bank of electrolytic caps at this voltage.
I think in Steve's 2nd tesla gun and Phillip's tesla gun, they both use something like 10 or so 6S 2.2AH 25-50C (to clarify, I meant 6S not 6C!) Lipos in series for something like around 200+V directly to the inverter and skipping the need for a boost converter. However I think the limitation right now is the small-size enclosure that you have and it might be tricky to fit a suitable battery inside. The modern LiPos though can supply more than enough power for small SSTCs though.
Re: lithium ion tesla coil?
TwirlyWhirly555, Mon Oct 06 2014, 07:22PM
At a normal voltage of 3.7V per Cell you would need 54 cells to get 200V , so 9 lots of 6S , even the really small cells would give some output but runs times suffer .
TwirlyWhirly555, Mon Oct 06 2014, 07:22PM
loneoceans wrote ...
I think in Steve's 2nd tesla gun and Phillip's tesla gun, they both use something like 10 or so 6C Lipos in series for something like around 200+V directly to the inverter and skipping the need for a boost converter. However I think the limitation right now is the small-size enclosure that you have and it might be tricky to fit a suitable battery inside. The modern LiPos though can supply more than enough power for small SSTCs though.
Steve Conner wrote ...
Steve Ward's Tesla gun also uses the LiPo batteries sold for RC model applications. I think he uses about 48V worth and steps it up to 300V with a DC-DC converter. Energy for the burst is stored in a bank of electrolytic caps at this voltage.
Steve Ward's Tesla gun also uses the LiPo batteries sold for RC model applications. I think he uses about 48V worth and steps it up to 300V with a DC-DC converter. Energy for the burst is stored in a bank of electrolytic caps at this voltage.
I think in Steve's 2nd tesla gun and Phillip's tesla gun, they both use something like 10 or so 6C Lipos in series for something like around 200+V directly to the inverter and skipping the need for a boost converter. However I think the limitation right now is the small-size enclosure that you have and it might be tricky to fit a suitable battery inside. The modern LiPos though can supply more than enough power for small SSTCs though.
At a normal voltage of 3.7V per Cell you would need 54 cells to get 200V , so 9 lots of 6S , even the really small cells would give some output but runs times suffer .
Re: lithium ion tesla coil?
Chris Cristini, Mon Oct 06 2014, 08:08PM
Staci elaan's work is pretty cool. Looks like a lower voltage large capacity lipo will be the way to go and prototype a boost converter in to the drive circuit but I'm hoping to get better results with audio modulation with of course lower output power. I am guessing max output would be a slow pulse. I really wish this was possible .
Chris Cristini, Mon Oct 06 2014, 08:08PM
Staci elaan's work is pretty cool. Looks like a lower voltage large capacity lipo will be the way to go and prototype a boost converter in to the drive circuit but I'm hoping to get better results with audio modulation with of course lower output power. I am guessing max output would be a slow pulse. I really wish this was possible
.Re: lithium ion tesla coil?
zrg, Mon Oct 06 2014, 09:05PM
Well, we're planning to run two 10-15kW DRSSTCs from these guys. Probably will turn out into something interesting, wireless Tesla energy tricks and such, you know
3.2V 200Ah each LiFePO4, 26 pcs total. Each can give out at least 1-1.5 kW CW.
zrg, Mon Oct 06 2014, 09:05PM
Well, we're planning to run two 10-15kW DRSSTCs from these guys. Probably will turn out into something interesting, wireless Tesla energy tricks and such, you know
3.2V 200Ah each LiFePO4, 26 pcs total. Each can give out at least 1-1.5 kW CW.
Re: lithium ion tesla coil?
Chris Cristini, Mon Oct 06 2014, 09:41PM
Wow electric car comes to mind.
Chris Cristini, Mon Oct 06 2014, 09:41PM
Wow electric car comes to mind.
Re: lithium ion tesla coil?
Steve Conner, Tue Oct 07 2014, 07:34AM
Yeah, you should build an electric car with a Tesla coil mounted on the roof.
Steve Conner, Tue Oct 07 2014, 07:34AM
Yeah, you should build an electric car with a Tesla coil mounted on the roof.
Re: lithium ion tesla coil?
Uspring, Tue Oct 07 2014, 07:58AM
You _do_ know,why a major electric car brand is called Tesla?
Uspring, Tue Oct 07 2014, 07:58AM
You _do_ know,why a major electric car brand is called Tesla?
Re: lithium ion tesla coil?
Steve Conner, Tue Oct 07 2014, 10:37AM
Because it comes with a SSTC-based cigarette lighter?
Steve Conner, Tue Oct 07 2014, 10:37AM
Because it comes with a SSTC-based cigarette lighter?
Re: lithium ion tesla coil?
Steve Ward, Fri Oct 10 2014, 08:36PM
My Gun V2 uses 96 lipo cells in series for 400V max. Ive pulsed them to 120A pretty regularly. They are Turnigy nano-tech brand, 2.2Ahr 25C (50C burst) rating. The batteries are fused at 20A so the average current is relatively low, operating in the 5kW range usually at most for gun use.
Pics can be seen on my flickr (may have to look back a ways) as ive yet to spend time documenting these projects.
Anyway, i think LiPo batteries make for an ideal power source for tesla coils but do use a fuse! Shorting these things is really quite dangerous, they can possibly catch fire and turn your project into a melted pile of slag. They deserve much respect for their size.
Steve Ward, Fri Oct 10 2014, 08:36PM
My Gun V2 uses 96 lipo cells in series for 400V max. Ive pulsed them to 120A pretty regularly. They are Turnigy nano-tech brand, 2.2Ahr 25C (50C burst) rating. The batteries are fused at 20A so the average current is relatively low, operating in the 5kW range usually at most for gun use.
Pics can be seen on my flickr (may have to look back a ways) as ive yet to spend time documenting these projects.
Anyway, i think LiPo batteries make for an ideal power source for tesla coils but do use a fuse! Shorting these things is really quite dangerous, they can possibly catch fire and turn your project into a melted pile of slag. They deserve much respect for their size.
Re: lithium ion tesla coil?
Chris Cristini, Sun Oct 12 2014, 02:45AM
There is some really nice pictures there great work! I actually punctured a lipo with a screw driver it was a mess had to sit it out side to do its thing. I may also experiment with the secondary by adding more than one layer of windings with good insulation hmm.
Chris Cristini, Sun Oct 12 2014, 02:45AM
There is some really nice pictures there great work! I actually punctured a lipo with a screw driver it was a mess had to sit it out side to do its thing. I may also experiment with the secondary by adding more than one layer of windings with good insulation hmm.
Re: lithium ion tesla coil?
Chris Cristini, Thu Oct 16 2014, 02:36AM
Any one have a micro brute DRSSTC Board? I bet that could fit in my case.
Chris Cristini, Thu Oct 16 2014, 02:36AM
Any one have a micro brute DRSSTC Board? I bet that could fit in my case.
Re: lithium ion tesla coil?
Patrick, Thu Oct 16 2014, 09:06AM
These are the cases where fuel cells and high power batteries really show how voltage is low, ( especially at high current ) each cell. So we waste mass and volume to series them up for a useful voltage.
Patrick, Thu Oct 16 2014, 09:06AM
These are the cases where fuel cells and high power batteries really show how voltage is low, ( especially at high current ) each cell. So we waste mass and volume to series them up for a useful voltage.
Print this page