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Registered Member #2677
Joined: Mon Feb 08 2010, 03:06AM
Location: Palo Alto, California, USA
Posts: 64
Goodchild wrote ...
Luca wrote ...
Goodchild wrote ...
you don't need to run your coils at such high PWs I never run my coils much higher than 100uS
If you go much higher than 100uS your efficacy just starts to drop.
In my opinion what is needed for large sparks is high bus voltage and good tuning.
ON time is related to surge impedance of primary LC circuit. The lower the impedance the shorter the ON time and vice-versa...
Anyway, ON time between 100 and 200us is quite common.
It sounds strange that the IXYS 60N60 are so (ralatively) weak, since in the easternvoltageresearch site these devices are sold as alternative of the well known HGT1N40N60A4D which have been proven to be quite reliable up to 1000 Apk under the right conditions... Also, looking at the datasheet the two devices look quite similar.
Are you shure that you were in the right conditions, and are you shure about your peak current measurements?
Regards,
Luca
Ya i'm shure, 60N60s don't come close to 40N60s performance
If 60N60s are not very good, what do you recommend? I don't think I am in the market anymore for SOT-227 IGBTs as nobody seems to have these for a decent price. Can you recommend a similar IGBT (300-500A peak) with a TO-247 package? The TO-247 version of the 40n60 is apparently obsolete now as well and the 60N60 made by fairchild has poor pulse current ratings. Fairchilds 75N60 looks okay do you know anything about that one? Thanks
Registered Member #2677
Joined: Mon Feb 08 2010, 03:06AM
Location: Palo Alto, California, USA
Posts: 64
Goodchild wrote ...
I'm not saying don't use the 60N60s they work very well, If your going to compare them to 40N60s that's another story
I personally have pumped 4.5+ feet of spark out of them, with a 18x4.5 inch secondary. I would like to see an IGBT in the TO package do that.
As for the 75N60 I have never tried them before but from the datasheet they look kinda slow.
I think I am going to use APT64GA90B from Microsemi Power Group. They look pretty fast compared to the 75N60s as well as a 1200V 35A IGBT I already have so I assume they have to be pretty decent. The datasheet provided by Microsemi is It also says specifically on the datasheet that they are recommended for ZVS full bridge applications. Thanks for all the advice on this thread!
Registered Member #2481
Joined: Mon Nov 23 2009, 03:07PM
Location: ITALY
Posts: 134
UbuntuNinja wrote ...
Goodchild wrote ...
I'm not saying don't use the 60N60s they work very well, If your going to compare them to 40N60s that's another story
I personally have pumped 4.5+ feet of spark out of them, with a 18x4.5 inch secondary. I would like to see an IGBT in the TO package do that.
As for the 75N60 I have never tried them before but from the datasheet they look kinda slow.
I think I am going to use APT64GA90B from Microsemi Power Group. They look pretty fast compared to the 75N60s as well as a 1200V 35A IGBT I already have so I assume they have to be pretty decent. The datasheet provided by Microsemi is It also says specifically on the datasheet that they are recommended for ZVS full bridge applications. Thanks for all the advice on this thread!
I do not agree with your choice. The Microsemi IGBT has a max current which is smaller that the rated max current of IXYS 60N60. Also, with 131ns of turn off delay time it is not really fast...
In general, mini block IGBT are more robust than TO247 ones.
Another big disadvantage is that this device does not have the co-packed anti-parallel diode.
I do not see any advatage in this device compared to the IXYS 60N60....
Registered Member #2677
Joined: Mon Feb 08 2010, 03:06AM
Location: Palo Alto, California, USA
Posts: 64
Luca wrote ...
UbuntuNinja wrote ...
Goodchild wrote ...
I'm not saying don't use the 60N60s they work very well, If your going to compare them to 40N60s that's another story
I personally have pumped 4.5+ feet of spark out of them, with a 18x4.5 inch secondary. I would like to see an IGBT in the TO package do that.
As for the 75N60 I have never tried them before but from the datasheet they look kinda slow.
I think I am going to use APT64GA90B from Microsemi Power Group. They look pretty fast compared to the 75N60s as well as a 1200V 35A IGBT I already have so I assume they have to be pretty decent. The datasheet provided by Microsemi is It also says specifically on the datasheet that they are recommended for ZVS full bridge applications. Thanks for all the advice on this thread!
I do not agree with your choice. The Microsemi IGBT has a max current which is smaller that the rated max current of IXYS 60N60. Also, with 131ns of turn off delay time it is not really fast...
In general, mini block IGBT are more robust than TO247 ones.
Another big disadvantage is that this device does not have the co-packed anti-parallel diode.
I do not see any advatage in this device compared to the IXYS 60N60....
Luca
Yeah i am aware that this device does not compare to the 60n60 but I set the current limiter in my ScanTesla simulations 150A lower (limit 350A). I did not notice that this IGBT does not have an anti-parallel diode thanks for pointing that out. What is the best TO-247 IGBT you can recommend? Digikey apparently sells the TO-247 variant of the 40N60 have a look at its specs What is an acceptable turn off delay time and current fall time for a TO-247 IGBT? These things are not going to have to switch all that fast. My Fres lower pole for the coupled system (where i will be running it) is 65kHz. I have been busy running models in ScanTesla and am glad to say that efficiency has increased over the results in that output file i posted when I started this thread. It now predicts 63" sparks for only 306A peak primary current and 500W input power.
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IXGN60N60 Max Current for a DRSSTC
