The invention discloses a designing method for a single-phase intelligent
ammeter power
transformer based on an EI type insert iron core. According to the designing method for the single-phase intelligent
ammeter power
transformer, output
voltage and current meet index requirements, besides, the size is small, and temperature rise is low. The designing method is based on references New electronic
transformer handbook, written by Quanbao Wang, Liaoning science and technology press, June 2007; from the step S1 to the step S13, an integrated round
copper wire gage
list is added, so that the current
carrying capacity of
copper wires of the selected sizes and specifications is judged, and wire selection errors are avoided. In addition, the number of turns of a secondary coil of a transformed designed for the first time may not meet the
voltage output index requirements, and output
voltage cannot meet the index requirements unless the number of the turns of the secondary coil is adjusted properly; a method for adjusting the number of the turns of the secondary coil is put forward in the step S14 and the step S15, and in terms of the
selection principle of decreasing or increasing the number of the turns, the number of the turns is decreased or increased according to the average value of all secondary floating voltage and load voltage errors; finally, from the step S16 to the step S18, recalculation is performed on the transformer. Accordingly, the output voltage and current of the intelligent
ammeter power transformer can meet the index requirements, and meanwhile the intelligent ammeter power transformer is small in size and low in temperature rise.