Then we proceed to calculate as follows:. demand load (kW) Power factor after correction Transformer type Permissible loading percentage () The nearest standard transformer rating (KVA) 2. Determining the MV/LV transformer rating Input parameters: Primary rated voltage (kV.) Secondary rated voltage (kV.) Max. It is opted as, the temperature rise for the intermittent operational cases are less for the continuous operational cases.So depending on the current densities choosen we now calculate the values of primary and secondary currents that are to searched in wire table for selecting SWG:-n1a = Primary current (Ip) calculated / (current density/200)n2a = Secondary current (Is) calculated / (current density/200)For these values of primary and secondary currents we choose the corresponding SWG and Turns per sqcm from the wire table. Distribution transformer calculations MS Excel Spreadsheet 1. The power stage design includes resonant tank, primary and secondary switches and magnetic elements. The tool helps design the power stage and program the IC setup parameters. For non-continuous or intermittent mode of operation of transformer one can choose a higher density up to 400A/cm² i.e., twice the normal density to economize the unit cost. The UCC25600 Design Tool is an Excel Spreadsheet based calculation sheet to help design an LLC half bridge converter using UCC25600. The above mentioned wire table is for a continuous rating at current density of 200A/cm². (GCA) Current densityIt is the current carrying capacity of a wire per unit cross sectional area. transformer design has been based on sinusoidal voltage and current.

Transformer design calculation excel