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60N60 IGBT

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matko123 5 years ago

Hi there! I am currently working on my tesla coil which is almost done. I am using the OneTesla TC design as a reference for my DRSSTC with primary feedback. The last thing which is missing are IGBTs. If you look at the OneTesla design, you will observe high frequency pulses going to the primary (feel free to see [http://onetesla.com/).](http://onetesla.com/) The primary frequency (chosen with primary capacitor and coil itself) matches the secondary resonance frequency. This already creates problem, because it is around 230kHz. This can cause problems later, because of the 340V bus and up to 300A pulses. This forces us to use IGBT, which usually can switch as fast as 200kHz maximum. There are specified IGBTs for this job, but I not interested into ISOTOP package IGBTs (or similar high power IGBT and expensive things) anyways. There is very experienced IGBT, the FGH60N60SMD out there, which seems to perform just fine up to 300kHz and can handle presented voltages and current. And that is actually, where the problem starts. There are so many variations of 60N60 IGBT out there, please help me. [IXGH60N60C3D1](https://www.tme.eu/sk/details/ixgh60n60c3d1/tranzistory-igbt-tht/ixys/) [IGW60N60H3](https://www.tme.eu/sk/details/igw60n60h3/tranzistory-igbt-tht/infineon-technologies/) [FGA60N65SMD](https://www.tme.eu/sk/details/fga60n65smd/tranzistory-igbt-tht/on-semiconductor-fairchild/) [FGH60N60SMD](https://www.tme.eu/sk/details/fgh60n60smd/tranzistory-igbt-tht/on-semiconductor-fairchild/) The price really matters for me. If not, I would just simply pick the FGH version. My question thow is, if there is a difference between those, maybe, if there is better version of 60N60 IGBT than FGH (like IXN...). If there is not difference, does it mean that I just pick the cheapest one and it will work like a charm? Alse, if there is not better IGBT version of 60N60, I will take the FGH60N60SMD and we will be settled. Let me know your experience. Thanks

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Comments

andyfierman 5 years ago

It is unlikely that anyone here has any knowledge of your application so cannot comment on the suitability of any particular device. It is unreasonable to expect anyone to read up all about your project and it's background just to get some idea of what you are talking about. You need to post a requirement specification for the igbt in your application.

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matko123 5 years ago

Sorry for my post design, I am not good in that. I want to use IGBT that Can switch Up to 250kHz , minimum of 600V and just below 300A. It will work in a very hard application forcing it to work in Its maximum ratings. But I do not think the application is important here, anyways. I just want to know, wheter it matters that i use FGH, IXN, IGW.. 60N60 or there IS just no difference between those. I am asking only to save money. If you are not sure, I will just také FGH60N60 (the most expensive) that I know they will work (because the original designer uses them and they are very experienced). Thanks

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andyfierman 5 years ago

It is almost impossible to say if the differences between a selection of very similar devices are important if the details of the application are not clearly specified. Up to 600V and 300A is a start but you need to understand what the stresses are on the device when operating. Things like what gate drive have you got in terms of voltage swing, slew rate or rise/fall time and available current and source impedance. How fast do you need to get igbt to turn on and off or how slowly can you tolerate? What load is it driving and how does the voltage across it change vs. current through it or vice versa? You are not simply switching a 600V supply to a 2 Ohm resistor so choosing a suitable device is not a simple task. One question that comes to mind though is what stops you using a MOSFET instead of an igbt. The gate drive for a MOSFET is a bit more difficult but the switching losses in a MOSFET may be much lower than an igbt simply because the on state voltage drop across the device may be lower. That said, I haven't looked at 600V, 300A MOSFETs so I may be asking a silly question.

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matko123 5 years ago

I think you are kind of answering me. As mentioned, I will use them to drive Tesla coil. It is almost a rule to use IGBT in there, just google some DRSSTC schematic. The problem is that a Tesla coil is far away from resistive load. It is a super high frequency (250kHz) transformer generating thousands of volts from my 340V supply. So, we need at least 600V IGBT, so that the spike coming back to the primary will not kill them. Another problém is that a Tesla coil is huge transformer needed to be driven at Its resonant frequency. It can suck around 280A from the Power line while resonating. To save the IGBTs, Tesla coils are usually driven in short bursts. I will use around 50us bursts with frequency of 1-1000Hz. You said that the differences between two almost identical Components are ignorable. Thank you for that. But I feel like I will rather pick the FGH60N60SMD to stay on the safe side.

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andyfierman 5 years ago

" You said that the differences between two almost identical Components are ignorable. " I don't know what gives you that idea because I most certainly did **not** say that.

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matko123 5 years ago

Sorry for that, I quess that was your point. Nevertheless, it is not important now. I had a look at very great post from kaizer ([http://kaizerpowerelectronics.dk/tesla-coils/drsstc-design-guide/igbts/](http://kaizerpowerelectronics.dk/tesla-coils/drsstc-design-guide/igbts/)) where he mentioned the most important characteristics od IGBTs in Tesla coil bridges. On the bottom, he had the longest list of used IGBTS in Tesla coil design i have ever seen-just what i am looking for. There are two IGBTs , that Can switch the 250kHz signals. The FGH60N65 and IXGN60N60 brick. Since the IXGN version is not available for me, I will have to get the 60N65. This makes me happy because the 60N65 is just weaker version of FGH60N60SMD and Kaizer says that they are great for my application. So I will just simply use the original design of OneTesla TC. Thank you for help and forcing me to find that. :) Feel free to mentioned something that I did not, but I hope I will get the right IGBTs to make my Tesla coil working correctly.

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andyfierman 5 years ago

Good luck and as I pointed out in your earlier thread about Tesla Coil designs: be careful and stay safe. :)

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matko123 5 years ago

Thank you :D

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