sekundäärikelan

Sekundäärikela, often translated as secondary coil, is a fundamental component in inductive devices such as transformers and ignition coils. It is typically a coil of wire wound around a common magnetic core, or in proximity to a primary coil. The operation of a sekundäärikela is based on the principle of electromagnetic induction. When an alternating current flows through the primary coil, it generates a changing magnetic field. This changing magnetic field then passes through the secondary coil, inducing an electromotive force (EMF) or voltage across its terminals.

In a transformer, the ratio of the number of turns in the secondary coil to the number of turns in the primary coil determines whether the voltage is stepped up or stepped down. A higher number of turns in the secondary coil results in a higher output voltage, while a lower number of turns results in a lower output voltage. This voltage transformation is crucial for efficient power transmission and various electronic applications.

In an ignition coil, specifically used in internal combustion engines, the secondary coil is designed to produce a very high voltage. This high voltage is necessary to create a spark across the spark plug gap, igniting the fuel-air mixture in the engine cylinder. The primary coil receives a low voltage from the vehicle's battery, and the rapid interruption of current in the primary coil causes a massive surge in the secondary coil's voltage. The construction and winding of the secondary coil are optimized to maximize the induced voltage and ensure reliable ignition.