kenttäkäämin

Kenttäkäämi is a Finnish term that translates to "field coil" in English. It refers to an electromagnet used to produce a magnetic field, often in electrical machinery like generators and motors. The field coil consists of wire wound around a core, typically made of iron. When an electric current flows through the wire, it generates a magnetic field that can interact with other magnetic fields or conductive materials.

In generators, field coils are crucial for creating the stationary magnetic field that induces a voltage in the rotating armature. Conversely, in DC motors, the field coil's magnetic field interacts with the magnetic field produced by the armature to create torque and cause rotation. The strength of the magnetic field generated by a field coil is proportional to the current flowing through it and the number of turns in the coil. Adjusting the current in the field coil allows for control over the output voltage of a generator or the speed of a motor.

Field coils can be designed in various shapes and sizes depending on their application. They are a fundamental component in many types of electrical equipment, contributing to the conversion of electrical energy into mechanical energy and vice versa. The concept of the field coil is central to the principles of electromagnetism and its practical applications in engineering.