Is power getting to your Igbt bridge from the DC bus caps?
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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