When the output circuit of a transformer is open, no current flows through the output coil, resulting in the primary experiencing only the magnetizing inductance and leakage inductance. The absence of current in the secondary prevents back electromotive force (back EMF) from affecting the primary. As impedance is added to the secondary, it reflects back to the primary, appearing in parallel with the primary's magnetizing inductance. Understanding this behavior is crucial for analyzing transformer operation under open-circuit conditions.
PREREQUISITESElectrical engineers, students studying power systems, and professionals working with transformer design and analysis will benefit from this discussion.
ahmadriaz said:can u explain what hapens output circuit is open and no current is flowing through output coil? isn't it that a large current flows through the input?and the wire burns...i know it doesn't hapen...but why?when there is no back emf in primary?