The BLDC motor is driven by rectangular voltage strokes coupled with the given rotor position (see
Figure 3). The generated stator flux interacts with the rotor flux, which is generated by a rotor magnet and
defines the torque and thus the speed of the motor. The voltage strokes must be properly applied to two
phases of the three-phase winding system so that the angle between the stator flux and the rotor flux is kept
as close to 90° as possible, to get the maximum generated torque. Therefore, the motor requires electronic
control for proper operation.