Why should the rotor of the DC motor be laminated by the silicon steel sheet with an insulating surface?
Through the rotor coil DC motor is AC commutator, the role is to point connected into AC DC brush.
When the coil outside the rotor is energized, the rotor is an electromagnetBut when the coil outside the rotor is energized, the magnetic force causes the electrons in the metal inside it to produce an electric current,Thus, the energy produced by the coil is divided into two parts:A part produces magnetism that turns the rotor into mechanical energy;One divides the electrons in the metal to produce an electric current, which is converted to heat;In order to reduce the heat generation, it is necessary to make the silicon steel sheet thin, so that the resistance is large, the current is small, heat consumption is smallThe lamination of silicon steel sheets with multiple insulating layers does not affect the magnetic forceSo, motors, transformers do that
The thin silicon steel sheet is superposed to reduce the coil induced eddy heating. The insulating layer is designed to prevent the coil and core from short circuited.
