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Commutation in Half Bridge SCR Inverter

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pradhan.rachit

pradhan.rachit

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Hello Experts,

I am designing a Half-Bridge Thyristorized Inverter. The Inverter has to deliver approximately 30 Watts into a R and a R-L load. The circuit is to be designed for laboratory demonstration purposes.

Any suggestions on what commutation technique to be used for this application?
I have ruled out Class A and Class B commutation because the load type keeps on varying as per required lab setup. (R or R-L)

Out of the remain commutation techniques, what would be the most suitable for this application and why?

Thanks, Rachit
 

A 30 W SCR inverter is a demonstration project, either to demonstrate antique power electronics concepts or the working principle of real high power (MW) systems. The commutation method would be choose according to the requirements of the demonstrated system.

I won't rule out "class B" (resonant LC circuit commutation). Load variations can be isolated by adding a series L.
 

Will it be possible to place Class B commutation in a Half-Bridge? Because as far as I can Imagine, the lower L-C branch will energize when the high side SCR is turned on and the higher LC branch will energize when the load side SCR is turned on along with suppling power to the load.

I'm not sure this kind of a configuration will commutate the SCR(s) ?

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FvM said:
I won't rule out "class B" (resonant LC circuit commutation). Load variations can be isolated by adding a series L.
Click to expand...

Are you talking about a McMurray-Bedford Half Bridge Inverter? Doesn't it have a similar type of commutation?
 

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