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The working principle of brush motor and brushless motor

source:Dongguan Sudong Electronic Technology Co.,Ltd release time:2017-06-03 Browse:686
Brushless DC motor consists of permanent magnet rotor, multi-pole winding stator, position sensor and other components. The position sensor converts the current of the stator winding in a certain order according to the change of the position of the rotor (that is, the position of the rotor pole relative to the stator winding is detected and the position sensing signal is generated at the determined position and processed by the signal conversion circuit To control the power switch circuit, according to a certain logical relationship between the winding current switching). The operating voltage of the stator winding is provided by the electronic switch circuit controlled by the position sensor output.

Brushless DC motor is the use of semiconductor switching devices to achieve electronic commutation, that is, with electronic switching devices instead of the traditional contact commutator and brush. It has the advantages of high reliability, no change sparks and low mechanical noise. It is widely used in high-grade recording blocks, video recorders, electronic equipment and automatic office equipment. The use of non-contact switch, do not need to replace consumables, long service life.