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Re: High Voltage Transformer
- To: tesla@xxxxxxxxxx
- Subject: Re: High Voltage Transformer
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Thu, 03 Mar 2005 20:04:06 -0700
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Original poster: NuclearFirestorm@xxxxxxx
I'll be discharging into an electromagnetic railgun.
In a message dated 3/3/2005 6:47:05 PM Eastern Standard Time, "Tesla list"
>Original poster: BunnyKiller <bunikllr@xxxxxxx>
>Okay... thats more like it...
>a 10KVAC trannie will work well since you are rectifying the output. In
>fact you maynot have to go above 125VAC input into the trannie.
>If you use a 12KV 30mA neon sign trannie you wont need the 5Kohm resistor
>since the trannie is current limited ( it can take the so called short
>circuit current draw at initial charge of the empty cap)
>altho if a 12KV unit is used, DC output will be around 16KVDC you may want
>to keep that variac below 90% output
>Ebay normally has several 12KV units available for around 20 - 50 $
>depending on whos selling ...
>A lighting supplier would carry them too but new prices are around 60 - 90
>$ depending on maker. Check the phone book for Neon Sign makers/
>installer, they normally have a stash of used , broken, old trannies
>sitting in the back or somewhere.... talk to them with an intellegent
>mannerism and let them know of your experience and desire with Hi Volt
>usage... you may get lucky and be given several units for free...
>BTW what are you discharging the cap into? flashlamp ? coil? H2O bomb?...
>Tesla list wrote:
>>Original poster: NuclearFirestorm@xxxxxxx
>>The cap I'm charging is a 225 uF 15kV cap. It will have a 5 MOhm energy
>>dissipation resistor, 500W 5 kOhm current limiting resistor, and a string
>>of balanced diodes to perform half-wave rectification.
>>The input power will come from a 110 input 0 to 130 Volt out variable
>>transformer. The variable transformer is to be raised at a certain rate
>>to keep the power from being initially too high. The circuit has been
>>designed and simulated in pSpice. I believe the charge time was 20 or 30
>>seconds, I forgot the exact number. The only missing part was a