Spulenspannung

Spulenspannung refers to the voltage applied across an inductor, commonly known as a coil. An inductor is a passive electrical component that stores energy in a magnetic field when an electric current flows through it. The relationship between the voltage across an inductor and the rate of change of current through it is defined by the fundamental equation of an inductor: V = L * (di/dt), where V is the voltage, L is the inductance (measured in Henries), and di/dt is the rate of change of current with respect to time.

When a changing voltage is applied to an inductor, it causes a corresponding change in the current flowing through it. Conversely, if the current through an inductor is changing, a voltage is induced across it. This induced voltage opposes the change in current, a phenomenon known as self-induction. The magnitude of this induced voltage is proportional to the inductance of the coil and how quickly the current is changing.

Spulenspannung is a critical parameter in the analysis and design of many electrical circuits, including filters, oscillators, and transformers. Understanding and calculating the spulenspannung is essential for predicting circuit behavior and ensuring proper operation. For example, in AC circuits, the voltage across an inductor is 90 degrees out of phase with the current, leading to reactive impedance.