Face mask machine stepper motor principle _ shenzhen mini stepper motor design
simple, if you want the brushless dc planetary gear motor can turn, you must make the stator coil magnetic field and magnetic field of permanent magnet rotor always exists between certain Angle. Rotor spinning process is the rotor magnetic field direction change process, in order to make the two magnetic field Angle, to a certain extent, the stator coil magnetic field direction must be changed.
so how can I know what to change the direction of the stator magnetic field? It is depends on the three hall. So we can understand to, the three hall shoulder the task of tell when to change the direction of current controller.
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