AC Machines

Three-Phase Star vs Delta Connections: Line and Phase Voltage and Current

Three-phase loads and sources are connected in one of two ways: star (Y) or delta (Δ). The two connections behave very differently — in star...

AC Machines

Transformer EMF Equation: E = 4.44 f N Φm — Derivation and Worked Example

Every transformer calculation starts from one equation: E = 4.44 f N Φm. It tells you the RMS voltage induced in a winding from the supply f...