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The Projects Forum Working on an electronics project and would like some suggestions, help or critiques? If you would like to comment or assist others with their projects, this is the place to do it.

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  #1  
Old 06-10-2012, 05:42 PM
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onlyvinod56 onlyvinod56 is offline
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Exclamation 1:1 transformer question reg:

Hello,

IN brief,

I want to trigger a mosfet/igbt with a pulse train of duty cycle 30% with 50Hz frequency.

Does the 1:1 pulse transformer responds to this signal?
Should i require any driving circuit?
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Old 06-11-2012, 11:36 AM
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onlyvinod56 onlyvinod56 is offline
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Any small info about pulse transformer is enough to proceed my discussion.
160 views but not even a reply.

Anybody worked on rectifiers.......

It will be thankful...
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Old 06-11-2012, 02:03 PM
wayneh wayneh is offline
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Quote:
Originally Posted by onlyvinod56 View Post
160 views but not even a reply.
This is because your needs are not clear. No one knew how to reply. Where's a schematic? What is a "pulse transformer"? Why did you ask about rectifiers? Why not just use the "normal" DIY solution of a 555 timer to provide your pulse train? More information will help people give you better answers.

A dedicated driver may not be needed at 50Hz, where the drive currents are not so large.
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Old 06-11-2012, 02:21 PM
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I saw your first question earlier today. And it was unclear. So at that moment i did not have time engage me in it. To me it look like you are confusing the function of a thyristor or TRIAC with mosfet/igbt. So it would help if you clear things up.
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Old 06-11-2012, 03:09 PM
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lightingman lightingman is offline
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Quote:
Originally Posted by onlyvinod56 View Post
Hello,

IN brief,

I want to trigger a mosfet/igbt with a pulse train of duty cycle 30% with 50Hz frequency.

Does the 1:1 pulse transformer responds to this signal?
Should i require any driving circuit?
Proably not. They are designed for short pulses or higther frequency. You would be better off using an opto-coupler.

Dan.
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Old 06-11-2012, 06:56 PM
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onlyvinod56 onlyvinod56 is offline
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Quote:
Originally Posted by wayneh View Post
A dedicated driver may not be needed at 50Hz, where the drive currents are not so large.
Thanks....thats all i want.

and regarding the schematic you are asking.......

there are many circuits where i want to use this pulse transformer.
example: a 5 level diode clamped multi level inverter.

Total 16 mosfets, 8 on each leg. I cannot use that many opto couplers. Iwant to eliminate the isolated power supplies. i want to use pulse transformer for each mosfet.
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Old 06-11-2012, 06:58 PM
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onlyvinod56 onlyvinod56 is offline
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Quote:
Originally Posted by t06afre View Post
you are confusing the function of a thyristor or TRIAC with mosfet/igbt. So it would help if you clear things up.
Wahtever..... they need a triggering pulse which i want to isolate from the triggering circuit.
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  #8  
Old 06-11-2012, 06:59 PM
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onlyvinod56 onlyvinod56 is offline
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Quote:
Originally Posted by lightingman View Post
Proably not. They are designed for short pulses or higther frequency. You would be better off using an opto-coupler.

Dan.
thankyou lightingman
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