Time for a new Warpinverter build

Author	Message
rogerdw Guru Joined: 22/10/2019 Location: Australia Posts: 955	Posted: 12:32am 13 Mar 2021         Haxby said   Ah I didn't know that there were different versions of the transformer within the same power rating. That's annoying! Yeah, I kept checking the model number of the actual inverter to make sure I hadn't mixed them up. My first two were one of each, then the third was another smaller one  ...  and the fourth was a bigger one. No question that the smaller ones are wound far more tidily and was no surprise that the first large one had burnt windings  ...  could easily have been through damage during winding. The second large one also had two joins in the windings. Bit of a surprise that they miscalculated and had to join the wire  ...  or maybe they damaged one during the wind and had to splice in a new bit. Either way there's no drama, just handy to know.   Warpspeed said   A thinner core with extra turns works about the same as a fatter core with fewer turns. The final overall dimensions may not be all that different. No way of really knowing what is underneath until it is completely unwrapped. I'm sure both sizes were good for their stated 3000VA  ...  but in our context of using the bare cores  ...  the bigger cores allow us to get a higher output from our rewinds  ...  or am I missing something. To give you some idea  ...  the smaller one has a cross sectional area of 29.75 sq cm  ...  and the larger one 36.75 sq cm  ...  that's 20% bigger. Happy to be corrected here  ...  just trying to understand the ins and outs.