Question

Почему нагреваются металические детали помещенные в переменное магнитное поле

Answer 1

Это явление называется Индукционный нагрев - это нагревание материалов электрическими точками, которые индуцируются переменным магнитным полем

Answer 2

Why do metal parts placed in an alternating magnetic field heat up?

When metal parts are placed in an alternating magnetic field, they can heat up due to a phenomenon called magnetic hysteresis. Magnetic hysteresis refers to the lagging of the magnetic field behind changes in the magnetic field strength. This lagging causes energy losses in the form of heat, leading to the heating of the metal parts.

The heating of metal parts in an alternating magnetic field can be explained by the following process:

1. Eddy Currents: When a metal part is exposed to an alternating magnetic field, it induces eddy currents within the metal. Eddy currents are circular currents that flow within the metal due to the changing magnetic field. These currents circulate within the metal and generate heat due to the resistance of the metal.

2. Resistance: The flow of eddy currents encounters resistance within the metal, which causes the conversion of electrical energy into heat energy. This resistance is a result of the metal's electrical conductivity and the size and shape of the metal part.

3. Energy Dissipation: As the eddy currents flow through the metal, they encounter resistance and dissipate energy in the form of heat. This heat energy raises the temperature of the metal part.

It's important to note that the heating effect of an alternating magnetic field on metal parts can vary depending on factors such as the material composition of the metal, the frequency and strength of the magnetic field, and the size and shape of the metal part.