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Micro-motor what magnet
- Nov 09, 2017 -

At present, most motor manufacturers use NdFeB magnets to make motor magnets and motor magnets. A few motor manufacturers also use SmCo magnets and permanent magnet ferrite to make motor magnets.

1, samarium cobalt has a high temperature (400 ), shiny metal color, the price is relatively high, considering the micro-point is rarely used samarium cobalt.

2, permanent ferrite, because of high temperature (400 or so) is better than NdFeB is beyond doubt, but! Ferrite to achieve micro-motor matching, sophisticated, high cost of the process, while the rejection rate is also high, because of easy to break or wear nicks.

3, and the use of neodymium iron boron magnets magnet motor permanent magnet motor small size, light weight, high torque - inertia ratio, servo system response, high power and speed / weight ratio, high starting torque, saving electricity. 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.

The following describes NdFeB.

(1) people usually use the magnet attraction and repulsion to drive, generally choose the radial symmetrical magnetization of the tile-shaped magnet to spell into a ring, sintered NdFeB is anisotropic material, can not be formed into a customer The slightly more complex magnetization direction you want.

(2) NdFeB is also divided sintered NdFeB bonded NdFeB, and bonded NdFeB more recognized by the industry. At present, some manufacturers can also do the radial magnetization of the bonded NdFeB magnets, but there are many requirements on the size grades (the magnetic flux density), and the magnetic properties also have the process requirements of stability and consistency. Meanwhile, the mold coils And magnetizing fixture are very expensive, if not a stable supplier, very few manufacturers will choose to bond NdFeB. But if your home is a company that produces high-quality micromotors, then bonded NdFeB is definitely your first choice for magnets in all sections.

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