Hello everyone,
I am in the process of building and inverter but I am having two serious problems. ONE; As I started out with electronics, I avoided the pnp transistor wherever I could (because I wasn't sure how to use it). I now have a much better understanding of how it works, but I'm still more comfortable with the npn. This is the circuit I'm going to use (http://www.electroschematics.com/3542/12-volt-inverter-for-soldering-iron/). There are so many similar circuits, and whats disturbing me the most is why use a pnp darlington pair. Wouldn't an npn darlington pair work?
TWO; The other issue is with the transformer. I followed some formulas and chose a flux density of 1.2 Tesla. Unfortunately, the number of turns are 2400 for the 230v output, and 125-0-125 turns for the 12 volt input. This seems huge for the transformer I plan to rewind (400 watts transformer) considering the smallest wire gauge I have is 28 swg. Would using, for example, 480 turns for the 230v output and 35-0-35 for the 12 volt output work?
Thanks for you time.
Isaac
I am in the process of building and inverter but I am having two serious problems. ONE; As I started out with electronics, I avoided the pnp transistor wherever I could (because I wasn't sure how to use it). I now have a much better understanding of how it works, but I'm still more comfortable with the npn. This is the circuit I'm going to use (http://www.electroschematics.com/3542/12-volt-inverter-for-soldering-iron/). There are so many similar circuits, and whats disturbing me the most is why use a pnp darlington pair. Wouldn't an npn darlington pair work?
TWO; The other issue is with the transformer. I followed some formulas and chose a flux density of 1.2 Tesla. Unfortunately, the number of turns are 2400 for the 230v output, and 125-0-125 turns for the 12 volt input. This seems huge for the transformer I plan to rewind (400 watts transformer) considering the smallest wire gauge I have is 28 swg. Would using, for example, 480 turns for the 230v output and 35-0-35 for the 12 volt output work?
Thanks for you time.
Isaac
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