Brushless motor base 2

And the stator magnetic field, the space of the stator current vector can be decomposed into vertical and parallel to the rotor magnet axis of two components. Vertical direction of the magnetic fields generated by the motor vehicle spare parts current component orthogonal to the rotor's magnetic field, this creates a rotating torque. And the magnetic axis parallel to the rotor current component, in line with the rotor magnetic field generated by the magnetic field, won't produce any moment. So, will need to make this a good control algorithm in parallel to fan motor the direction of the rotor magnetic axis and minimum current component, because the current component can make the motor only produce excess heat, and bearing wear. We need to control current of coil, in order to make magnetic axis perpendicular to the rotor current component in the direction of maximum. 

Thus the motor torque and in proportion to the size of the current component. In order to effectively achieve sustained steady torque, we need an ideal steady magnetic field, to produce a stable stator current space vector, and the magnetic field need to follow the rotation of the rotor magnetic field with real-time vertical remain forever. From ac motor the perspective of the rotation of the rotor and the stator current space vector wholesalemotor.blogspot.com on the numerical value should be a stable value. So in the process of motor rotation, the space of the stator current vector representation should be a circle. As a result of the stator current vector is produced by the three groups of coil current component will overlap and become, and on the physical structure of the coil is the spacing between 120 degrees, so the motor current vector should be a string of three groups of ideal wave signal will overlap and become, at the same time, the three sets of strings is 120 degree phase Angle between wave signal.