Primaarikäämin

Primaarikäämi, often translated as primary coil, is a fundamental component in electromagnetic induction devices such as transformers and induction coils. It is the coil of wire that receives the initial electrical energy. In a transformer, the primary coil is connected to an alternating current (AC) source. When AC flows through the primary coil, it generates a changing magnetic field. This changing magnetic field is then channeled through a magnetic core, typically made of iron, to a secondary coil. The interaction of this fluctuating magnetic field with the secondary coil induces a voltage in it, a phenomenon known as mutual inductance. The ratio of the number of turns in the primary coil to the number of turns in the secondary coil determines the voltage transformation in the transformer. In induction coils, the primary coil is designed to produce a strong, rapidly collapsing magnetic field when the current is interrupted, resulting in a high voltage pulse in the secondary coil. The physical characteristics of the primary coil, including its number of turns, wire gauge, and insulation, are crucial for its performance and the overall efficiency of the device it is part of.