As the third generation of rare earth permanent magnet, Neodymium magnets are the most powerful commercially produced magnets. Neodymium arc magnet, also known as Neodymium curved magnet, is a unique shape of sintered Neodymium magnet, then almost all of Neodymium arc magnet is used for both rotor and stator in permanent magnet (PM) motors, generators, or magnetic coupling devices.
Neodymium arc magnet for frequently-used radial flux motor is magnetized through diametrical direction and definitely used in pairs. It should be noted that pure radially magnetized Neodymium arc magnets are extremely difficult to manufacture. Fan-shaped arc magnet is commonly served as axial flux motor magnet. For some axial flux motor, a certain quantity of chord magnetized magnet should be placed between regular axially magnetized magnet to form a Halbach array, then obtain more ideal magnetic field strength and distribution