hysteresihäviöitä
Hysteresihäviöitä, known in English as hysteresis loss, refers to energy dissipated as heat in a ferromagnetic material when subjected to a cycle of alternating magnetization. This occurs because the magnetic domains within the material do not perfectly align and realign with the external magnetic field instantaneously. As the magnetic field strength is increased, domains align, and when the field is decreased, some domains retain their alignment or realign in a direction slightly different from the previous state. This lagging effect is called hysteresis.
The energy loss associated with hysteresis is proportional to the area enclosed by the hysteresis loop, which
Hysteresis loss is an important consideration in the design of electrical devices to minimize energy waste