The previous sections, small make up briefly discusses the basic structure of the micro brushless dc motor controller is what, today I give everybody introduction miniature rotor brushless dc motor controller
the miniature dc motor controller of rotor generally consist of permanent magnets, shaft and some magnetic material, a shaft is very thin, generally USES the permeability of high strength metal materials, such as titanium alloy, stainless steel, its major
is used to transfer torque produced by micro motor. Are not magnetic materials in order to prevent from unnecessary leakage magnetic circuit. Permanent magnets and magnetic material of the rotor magnetic circuit,
is mainly used to produce enough in micro motor air gap magnetic flux, in order to interact with the current in the stator winding and torque generation. Therefore, magnetic materials, especially of permanent magnetic material
performance and full magnetic situation will directly affect the volume of a micro brushless dc motor controller, performance index and operation features. In recent years, the development of permanent magnetic materials development soon, the main species are aluminum nickel and cobalt, iron
oxygen and three kinds of rare earth magnets, etc. The rare earth magnets and the first generation of samarium cobalt 1:5, the second generation of samarium cobalt 2:17 and the third generation of ndfeb.
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