High Quality Neodymium Arc Magnet for DC Motor

Neodymium Arc Magnets are also called segment magnets or curved magnets.
Arc magnets are mainly used as permanent magnet DC motors. Unlike electromagnetic motors that generate magnetic potential sources through excitation coils, arc permanent magnet have many advantages instead of electric excitation, which can make the motor simple in structure, convenient in maintenance, light in weight, small in size, reliable in use, and low in energy consumption.

There is a strong "exchange coupling" between adjacent electrons in a ferromagnetic substance. In the absence of an external magnetic field, their spin magnetic moments can be "spontaneously" aligned in a small area. rise to form small areas of spontaneous magnetization, called arc magnets. In the unmagnetized ferromagnetic material, although each arc magnet has a definite spontaneous magnetization direction inside and has great magnetism, the magnetization directions of a large number of arc magnets are different, so the whole ferromagnetic material does not show magnetism.

When the electromagnet is in the external magnetic field, the volume of the arc magnet whose spontaneous magnetization direction and the direction of the external magnetic field have a small angle expands with the increase of the applied magnetic field and further turns the magnetization direction of the arc magnet to the direction of the external magnetic field.