Introduction of the main parts of brushless motor
The brushless motor adopts the semiconductor switching device to realize the electronic commutation, that is, the electronic switch device is used to replace the traditional contact commutator and brush. The utility model has the advantages of high reliability, no commutation spark, low mechanical noise, etc. the utility model is widely used in high-grade recording seats, video recorders, electronic instruments and automatic office equipment.
The brushless motor consists of a permanent magnet rotor, a multi pole winding stator and a position sensor. According to the change of the position of the rotor position sensor, along a certain order current to the stator windings of the converter (i.e. the detection of rotor position and stator winding and relative position of the sensing signal at a location determined by the signal conversion circuit after processing to control the power switch circuit of winding current switch according to certain logical relation). The working voltage of the stator winding is provided by the Holzer switch circuit controlled by the position sensor output.
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