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Registered Member #1854
Joined: Wed Dec 10 2008, 06:09PM
Location: West-Flanders Belgium
Posts: 88
k it is handy to correct the power but i don't know the self inductance of a MOT is there an average self inductance for a 240V MOT?
but will the power correcting cap lower the current draw ? my fuse is 16A and there are 2MOT's so will the power correcting cap prevent my fuse from blowing ?
if not will a MOC in series with the secondary lower the current ?
Registered Member #989
Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
Yes, the series cap will reduce the current draw (depending of the value) but you need to be aware that you CANNOT put a ressoant cap value on the primary (ressoant with the primary) or it will destroy your mot and probally a few things near in the same wallplug
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Just yesterday i used a single MOT and had some rather nice results. If you can find hv capacitor/make a mmc for high voltage, you can make a simple voltage tripler or quadrupler, and then run that through two MOT's as chokes, and use that as a power supply. I did yesterday, and with around 80 volts in and something like 500 watts, i got about 2 foot sparks at an insane BPS (i am thinking around 1kbps, the motor was running around 5-6 thousand rpm with 8 flying electrodes. At 6000 rpm that would be 800bps :)). The cool part is since it is dc, you don't worry about the line waveform and the rotary gap firing when voltage is low and not when it is high, so you can use any bps you want within reason. You can go high, or low and anywhere in between.
Registered Member #1854
Joined: Wed Dec 10 2008, 06:09PM
Location: West-Flanders Belgium
Posts: 88
i still have one remaining question about the grounds.
if you have your double MOT supply then you put your cores together and lay them to ground so that there is no stress on the insulation.
but that ground may that be mains ground or must that be a separate ground?
because when your tesla coil starts running there will be high frequency kickback into the primary so that highfrequency voltage will also stand over the secondary's of your MOT's.
so if your ground between the MOT-cores is the mains ground, then the high frequency current will flow trough your house wright and that could bring some devastating effects.
if something is wrong about my theory on this or if im overlooking something please comment cause i don't want to make any mistakes that could cost me a new computer or new tv etc ...
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tesla coil powersupply
