Have you checked the continuity of the connection of the Igbt bridge inverter to the primary. Also check the resonant capacitor that is connected in series with the primary to
make sure it is fine. It should be fine if it is new out of the box. What voltage are you applying to the inverter? It should be at least 20- 40v before you begin to see any resonant current feedback into the digital driver circuit. Below this will not get any feedback loop going.
Brian
Brian
Sent from my iPhone
> On Jun 4, 2016, at 7:51 PM, Noah Anglin <noahbdanglin@xxxxxxxxx> wrote:
>
> The interrupter seems to be working just fine. I took a multimeter and put
> the leads on the IGBT's collector and emitter. When I sent the controller a
> signal via the interrupter, the IGBT appeared to be switching. The
> resistance went from no reading to indicating a closed circuit in relation
> to me using the interrupter. I took a video so you can see what I mean.
> You'll notice that i also hooked up a speaker to my interrupter so you can
> hear when I am turning it on and off. If I am not mistaken, This should
> mean that my controller, interrupter and IGBT are working.
> I checked all of the pins on the interrupter's ICs and found them all to be
> connected.
>
> Here is the video. Sorry for the shakiness in the beginning. I'm not sure
> what that was about.
> https://goo.gl/photos/Ypfjf5LtauZyvbZz8
> At this point I am pretty sure the problem is really simple but I am still
> lost.
> Thanks again for your help!
>
> On Sat, Jun 4, 2016 at 4:07 PM, Brian Decosta <briandecosta38305@xxxxxxxxx>
> wrote:
>
>> Make sure you have output to the gdt by just running the interrupter. If
>> so your ICs are probably connected. Next make sure gdt is wound correctly.
>> If nothing on the gdt secondaries or gdt primary, then make sure the ICs
>> are properly seated ( assuming they are through hole in an iC socket). I
>> have run into this issue before. If they are not properly seated in the IC
>> socket then pop them out and reinsert them. You can use a multimeter to
>> assess whether each leg is connected to the IC socket.
>>
>> If all above is working, then try running it with no secondary and just
>> using primary feedback to see if you can inductively heat pieces of metal
>> that are placed above the secondary with low voltage setting applied to the
>> bridge inverter via a variac.
>>
>> Hope this helps
>>
>> Brian
>>
>>
>>
>> Sent from my iPhone
>>
>>> On Jun 4, 2016, at 5:02 PM, Noah Anglin <noahbdanglin@xxxxxxxxx> wrote:
>>>
>>> Thanks for the tip,
>>> Unfortunately it still isn't working. It seems as though no current is or
>>> ever has flown through the primary coil. Nothing was picked up by my amp
>>> meter when I latched it around the primary coil. There seems to be no
>>> activity whatsoever in the switching circuit. I have attached a picture
>> of
>>> my gdt winding setup. It is supposed to have 12 turns.
>>> Thanks!
>>>
>>> On Sat, Jun 4, 2016 at 6:34 AM, Brian Decosta <
>> briandecosta38305@xxxxxxxxx>
>>> wrote:
>>>
>>>> Have you tried reversing the direction of the primary coil. Or reverse
>> the
>>>> connections of the primary feedback transformer. Hope it works!
>>>>
>>>> Brian
>>>>
>>>> Sent from my iPhone
>>>>
>>>>> On Jun 3, 2016, at 5:46 PM, Noah Anglin <noahbdanglin@xxxxxxxxx>
>> wrote:
>>>>>
>>>>> Here <https://goo.gl/photos/zKBpjberWMZARZM2A> is the video I forgot
>> to
>>>> add
>>>>> of my trying to operate the Tesla coil.
>>>>>
>>>>>> On Fri, Jun 3, 2016 at 3:44 PM, Noah Anglin <noahbdanglin@xxxxxxxxx>
>>>> wrote:
>>>>>>
>>>>>> Hello all,
>>>>>> I think that at least someone might have had the problem that I do at
>>>> the
>>>>>> moment. I am building Eastern Voltage Research's reference design 1.0
>>>>>> DRSSTC and need some help. I managed to get the bus circuit working
>>>>>> properly at the intended 340 volts and have assembled the rest of the
>>>> coil
>>>>>> according to the schematic but am not getting any sparks. When I give
>>>> the
>>>>>> controller a signal, it does respond by lighting the MOD ACTIVE light
>>>>>> according to the signal power and frequency but It does not appear to
>> be
>>>>>> driving the circuit at all. My IGBT is working (I tested it). I am
>> also
>>>>>> fairly certain that nothing else in the switching circuit is broken.
>> Any
>>>>>> suggestions for what might be wrong?
>>>>>>
>>>>>> I don't use oscilloscopes very often and therefore am unsure where I
>>>> need
>>>>>> to probe the circuit to get a current reading. I have an extra current
>>>>>> transformer but have no idea how to hook it up with my oscilloscope.
>>>>>>
>>>>>> If anyone has any ideas on what I'm doing wrong it would help out a
>>>> lot. I
>>>>>> am trying to finish this before I graduate high school in two weeks.
>> My
>>>>>> brother and I started this DRSSTC project about a year ago and moved
>> on
>>>> to
>>>>>> a fusion reactor before we finished the Tesla coil so the Tesla coil
>>>>>> project got pushed to the side. Now that the fusion reactor is
>>>> complete, I
>>>>>> would very much like to finish this project.
>>>>>> You might notice some of the other projects in my room. They include a
>>>>>> laser turret, fusion reactor and a few spark gap Tesla coils. If
>> you're
>>>>>> interested here <https://www.youtube.com/user/musicman977/videos> is
>> a
>>>>>> link.
>>>>>> Thanks!
>>>>>> Noah Anglin
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