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Forums
4hv.org :: Forums :: High Voltage
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SCR inverter (thyristor inverter)

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zilipoper
Wed Nov 23 2011, 11:51AM Print
zilipoper Registered Member #4152 Joined: Thu Oct 20 2011, 10:18PM
Location: The Russian Federation
Posts: 108
 		Hi all.:-D
represents a generic device, do not kill SCR inverter:-D
supply voltage 400v DC
frequency-6-25kHz
SCR Russian thyristor ТЧ63-9
driver TL494CN








1322048777 4152 FT0 Sam 2594

1322048777 4152 FT0 Sam 2572

1322048884 4152 FT0 Sam 2560

1322048884 4152 FT0 Sam 2562

1322048884 4152 FT0 Sam 2564

1322048884 4152 FT0 Sam 2565

1322048954 4152 FT0 Sam 2563
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zilipoper
Wed Nov 23 2011, 11:58AM
zilipoper Registered Member #4152 Joined: Thu Oct 20 2011, 10:18PM
Location: The Russian Federation
Posts: 108
coming soon do not kill SCR Half-bridge inverter:-D



1322049497 4152 FT129041 Scr Induction Heating
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Inducktion
Wed Nov 23 2011, 11:59AM
Inducktion Registered Member #3637 Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
 		All I can say is, wow, those arcs are very nice.

They would be fantastic in a Jacob's Ladder.

Are you going to post a schematic of this, or are you planning on keeping it a secret? ;o
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zilipoper
Wed Nov 23 2011, 12:18PM
zilipoper Registered Member #4152 Joined: Thu Oct 20 2011, 10:18PM
Location: The Russian Federation
Posts: 108
 		pumped power ferrite add do not kill SCR Half-bridge inverter
at a frequency of 7kHz - 10kW
at a frequency of 15kHz - 23kW
at a frequency of 50kHz - 80kW
at a frequency of 65kHz - 100kW

scheme will publish later:-D
need to finish the scheme

1322050513 4152 FT129041 Sam 2472

1322050544 4152 FT129041 Sam 2481

1322050563 4152 FT129041 Sam 2491

1322050583 4152 FT129041 Sam 2499

1322050602 4152 FT129041 Sam 2509

1322050634 4152 FT129041 Sam 2513
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Steve Conner
Wed Nov 23 2011, 12:44PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
 		Excellent! smile

Can you please explain how the inverter works with only one SCR? How does the SCR turn off once it's been fired?
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zilipoper
Wed Nov 23 2011, 01:09PM
zilipoper Registered Member #4152 Joined: Thu Oct 20 2011, 10:18PM
Location: The Russian Federation
Posts: 108
 		Hi Steve8-)
single-ended converter
Link2
when the direction of current in the coil on the opposite, the thyristor is closed before the next pulse:-)
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Daedronus
Wed Nov 23 2011, 01:54PM
Daedronus Registered Member #2329 Joined: Tue Sept 01 2009, 08:25AM
Location:
Posts: 370
 		That's a huge amount of ferite..... confused
what do you plan to use it for?
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zilipoper
Wed Nov 23 2011, 01:59PM
zilipoper Registered Member #4152 Joined: Thu Oct 20 2011, 10:18PM
Location: The Russian Federation
Posts: 108
 		yes 7kHz SCR inverter - 10kW:-D
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Marko
Wed Nov 23 2011, 02:46PM
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
 		Zillipoper - OMG... the secondary on that transformer looks homemade as well? :O

How much power does the thing draw while making a 20cm arc? I would think you're overdriving the ferrite so much it would cook in seconds.


And if you really intend on constructing a HV transformer out of all that ferrite, where will you get 100kW+ required to drive it? O_O


Funny, I've got some big SCR modules too and wasn't even sure what to do with it. I was discussing with Steve about the possibility of wiring one in a series resonant circuit with a MOT at few hundred Hz so the thyristors get naturally commutated. Some current control scheme would be mandatory though to prevent the thing from blowing up :)

Marko
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zilipoper
Wed Nov 23 2011, 03:11PM
zilipoper Registered Member #4152 Joined: Thu Oct 20 2011, 10:18PM
Location: The Russian Federation
Posts: 108
 		hi Marko :8-)
Power arc 1500-2000W
secondary coil Russian flyback transformer cheesey
ferrite cold, secondary cold, SCR cold suprised suprised
ballast roasted cheesey cheesey

I will do 10kW SCR inverter 7- 10kHz

later try to construct SCR DRSSTC:-D resonant frequency 20-40kHz
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