Primäärikääminä

Primäärikääminä, or primary winding, refers to the coil of wire in an electrical transformer that is connected to the input voltage source. It is typically wound around a magnetic core, often made of laminated iron. The primary winding is responsible for receiving electrical energy from the power supply and converting it into a magnetic field within the core. The number of turns in the primary winding, along with the number of turns in the secondary winding, determines the voltage transformation ratio of the transformer. According to Faraday's law of induction, when an alternating current flows through the primary winding, it creates a changing magnetic flux in the core. This changing magnetic flux then induces a voltage in the secondary winding, allowing for the transfer of electrical power. The design and properties of the primary winding, such as its resistance and inductance, are crucial for the overall efficiency and performance of the transformer. In essence, the primäärikääminä is the initial point of energy input into the transformer system.