Brushless motor and permanent magnet powerful magnets, experienced two years of downturn in the development period, the market outlook in 2014 will be how everything is unknown, permanent magnet magnets and brushless motor motor relationship is like a person, permanent magnet Strong magnet is like a human heart, brushless motor drive is like a human nerve, controlling the entire brushless motor motor operation, so brushless motor from the structure of the motor, the important part is that the permanent magnet force magnet With drive controller.
At present, most motor manufacturers use NdFeB magnets to make motor magnets and motor magnets. The permanent magnet motor with NdFeB magnets as the motor magnet has the advantages of small size, light weight, high torque-inertia ratio, high servo system response, high power and speed / weight ratio, high starting torque and saving electricity. A small number of motor manufacturers will also use SmCo magnets and permanent magnet ferrite magnets. Motor magnets and motor magnets are mostly of the shape of a tile, a ring or a trapezoid and can be used in different motor motors, such as permanent magnet motors, AC motors, DC motors, linear motors, brushless motors and the like.
People usually use the magnet attraction and repulsion to drive, generally choose to radially symmetrical magnetized tile type magnet to spell into a ring, sintered NdFeB is anisotropic material, can not be made in one molding as customers want Slightly complicated magnetization direction. At present, some manufacturers can also do the radial magnetization of sintered NdFeB magnets, but the size of the brand