Power electronics : half bridge vs H bridge

[ernd59]

what is the the Difference between the a H bridge and half bridge power inverter?
i mean both do the same job ? what are the pro and contra of using a half/H bridge ? and how would it effect the size of a transformer if I am using one

thanks

 

[Svein]

A H bridge gives you essentially twice the voltage across the primary. For the same power into the transformer, this means half the current in the primary winding.