Arc magnets are named by their special geometry. They are also called arc motor magnets because most arc magnets are used in electric motors or generators. Due to the technical limitation in manufacturing radially magnetized ring magnets, individual arc magnets remain a reasonable and cost-effective option for most permanent magnet motors. Tengye Magnetic manufactures arc motor magnets made of neodymium-iron-boron and supplies Sm2Co17 magnet Neodymium magnets and ferrite magnets dominate the market of permanent magnet motors magnets. Neodymium arc magnets are used in high performance motors or motors with compact size, while ferrite arc magnet in relatively large motors with relatively low torque requirement. Besides, Sm2Co17 magnet (2nd generation of rare earth magnet) always remains in existence in motor application because of its excellent magnetic strength and temperature stability.