RE: [TCML] Off grid, medium size, 12V battery powered TC

["S&JY" <youngs@xxxxxxxxx>]

I think alternators without diodes for AC output will not produce much power
at 60 Hz (or 50 Hz).  When they are running at normal speeds - a few
thousand RPM, the frequency will be too high to be useful for NSTs, MOTs,
etc.  But if you leave in the diodes, you can get over 100 VDC out at a few
KW which would work great for a DRSSTC.  Others who have used alternators
for AC output should also weigh in with their experience.

 

Happy New Year,

Steve Y.

 

  _____  

From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Jonathan Peakall
Sent: Wednesday, December 29, 2010 10:54 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Off grid, medium size, 12V battery powered TC

 

Dave,

Hey now! That sounds like an idea. Folks used to use washing machine  motors
for such things, and I have plenty of junk and I know where to get more. :)

I have a lawnmower motor hooked up to an alternator that I use for charging
batteries, be easy enough to hook some other motor/generator/alternator. I
have a 25 amp, 130V at 2500 rpm motor that might work, although I have been
planning on building a wind turbine with it.

Hmmm, food for thought, thanks for the idea!

Jonathan

----- Original Message -----
From: "David Speck" <Dave@xxxxxxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Wednesday, December 29, 2010 8:52 AM
Subject: Re: [TCML] Off grid, medium size, 12V battery powered TC


> Jonathan,
>  > How about a mechanical inverter -- a suitably large DC or universal
> motor connected to an alternator with a belt or flexible shaft
> coupling.  I've heard that automotive alternators with their diode
> bridges removed can make inexpensive and robust generators of three
> phase AC.
>
> That way you can select components sized to the amount of power you want
> to burn, and you won't have any finicky silicon to destroy on the chain.
>
> Dave
>
> On 12/29/2010 11:15 AM, Jonathan Peakall wrote:
>> Paul,
>>
>> I might try that, but my experience with cheap inverters is that they
>> are easy to fry. I feel like I'd be pretty much sending it to a
>> certain death. I may have to though, my HV bug is itching.
>>
>> Jonathan
>>
>>
>>
>>> Why don't you just buy a cheap, Harbor Freight comes to mind, voltage
>>> inverter and use it to power a regular 120 volt AC Tesla Coil with a
>>> neon
>>> sign transformer or OBIT? Harbor Freight has a sale going right now
>>> for a
>>> 1200 watt 12VDC to 120VAC inverter for $120 and that should work fine
>>> for
>>> powering a small TC. You certainly seem to have all of the 12VDC
>>> power you
>>> would need available and if you burn up the inverter, $120 is a lot less
>>> than damaging your other off grid equipment.
>>> Paul
>>> Think Positive
>>>
>>> On Thu, Dec 23, 2010 at 2:44 PM, Jonathan Peakall
>>> <jpeakall@xxxxxxxxxxxx>wrote:
>>>
>>>> Hi all,
>>>>
>>>> I moved onto my off grid property a while back. I'm itching to play
>>>> with a
>>>> TC, but my power system involves expensive inverters and other control
>>>> electronics. What I'm looking for is a way to power a medium powered
>>>> coil
>>>> from a 12V battery bank. I have a 1200aH battery bank to play with,
>>>> so I
>>>> have plenty of power available. I have a 6" by 48" secondary handy,
>>>> or I
>>>> could wrap somehting smaller. I'd be happy with 2' streamers.
>>>>
>>>> Any leads on such a coil?
>>>>
>>>> Jonathan
>>>>
>>
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