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Type: Posts; User: JulesP

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  1. Replies
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    I believe it's possible as the original South...

    I believe it's possible as the original South African developer that I based my rotor based system on uses his to run his house lighting. I just haven't yet found out what the tweek is!
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    Finding the resonant frequency of coils

    Hi all,

    Having sorted my coil driver circuits to give enough power when using a BJT, I have been making measurements of battery charging at different HV pulse frequencies and so far not found one...
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    Coil Driver 2

    Hi all,

    After some repairs and modifications to allow me to compare coil drivers more easily, I have returned to test the same four ones that I reported earlier. When I first tested the BJTs, I...
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    Yes that seems to concur with my findings but, as...

    Yes that seems to concur with my findings but, as I have shown in the diagram, there is a good path for the HV to take and the position of the 'flyback diode' does not seem to interfere with that as,...
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    Coil Driver Comparisons

    Hi all,

    I have been experimenting with different coil drivers to obtain the best HV spikes and battery charging and partly inspired by the suggestion that using FETs can severely limit the spikes...
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    Inductive Reactance

    The correct term for the increasing impedance of an inductor (coil) with increasing frequency is Reactance. This is why just ramping up the frequency gives diminishing returns. To some extend one can...
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    Observations and Thoughts

    Hi all,

    While I haven't yet found out why the cap dump circuit isn't discharging to the batteries, I seem to have stopped the FET from being damaged (not sure how or why) and have instead been...
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    Problem

    Well I was hoping for a smooth operation of the cap dump circuit but something is not right in the way it is integrating with the rest of the generator. When I have the generator working and showing...
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    Revised Circuit and Update

    I have attached the latest circuit that I think should work based on the earlier designs of others. I had got R5 & R6 connected up wrong (as shown in the attachment in the previous post) and which...
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    Like this . . . Looking back at SG Intermediate,...

    Like this . . . Looking back at SG Intermediate, where similar things are discussed, it appears that switching the positive will work just as well. The only downside is the 0.6V loss from the extra...
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    A Solution

    Hi mml,

    Based on your thinking I have one idea that might work that keeps my current battery setup with the swapper. As the problem is around the common ground line for the batteries and the...
  12. Replies
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    Hi mml, Having drawn up the circuit in...

    Hi mml,

    Having drawn up the circuit in readiness for the build I have come across an issue that seems to be relevant to the solid state design.

    When looking at how to arrange the negative side...
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    Hi RS, Thank you for your thoughts. Since...

    Hi RS,

    Thank you for your thoughts.

    Since writing that post I have had a chance to get to understand the circuit better and have drawn my own version of it (attached) that I find helpful as a...
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    Thanks. If D3 needs to be a 15V Zener instead of...

    Thanks. If D3 needs to be a 15V Zener instead of 12V then perhaps I can just use the same as D2 (IN4744A)?

    Regards

    Jules
  15. Replies
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    Hi mml, From your helpful information I have...

    Hi mml,

    From your helpful information I have made my own attached drawing which is part of the build process for me. I hope it and the credits are right.

    I would need to feed the discharges via...
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    Hi mml, Thank you for the detailed replies: ...

    Hi mml,

    Thank you for the detailed replies:



    Ok so the HV pulse from the generator's FET Drain (which reverses polarity and goes HV+) will connect directly to Pos of the Capture Cap. Where...
  17. Replies
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    Cap Dump Circuit for 36V system

    Hi RS,

    I'm late to the party but have been developing a solid state generator (attached) and am at the stage where I wish to compare the battery charging when feeding the HV pulses (attached)...
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    Hi mml, Thank you for bringing all those...

    Hi mml,

    Thank you for bringing all those threads together. I think I need to build some form of cap dump system, if only to compare the performance of feeding HV straight to the 36V battery sets....
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    Solid State Generator Update

    Hi all,

    Over the last few months I have been working on my solid state generator, which effectively replaces the rotor based triggering of the coils with a square wave generator system that gives...
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    HV Current Measurement

    Hi John,

    Yes there are connections to the other set of batteries but my swapper system, and the large relay you can see on its side, isolate one set at a time to be charged. Also at this moment I...
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    As per the attached. Between the bottom of the...

    As per the attached. Between the bottom of the coils and the battery.

    Jules

    7212
  22. Replies
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    Measuring the HV current on the Solid State generator

    Hi all,

    I am close to starting to make output power measurements as a function of oscillator frequency in my solid state generator. Before I do that I have prepared two devices that will help me...
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    Hi John, All your points of view and...

    Hi John,

    All your points of view and experience are useful in building a bigger picture for all interested parties to explore these perspectives. At some or other point these questions will arise...
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    John, A follow up thought to my comments on...

    John,

    A follow up thought to my comments on your coil output current measurements in the previous post. On a point of theory, given that normally the back emf pulse from a coil has a high voltage...
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    Hi John, That very interesting and it sounds...

    Hi John,

    That very interesting and it sounds like you have a beefy setup there. Can you put up a couple of pics?

    I have attached some drawings to illustrate what I think you are doing, in the...
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