Step1 Phase U is connected to the positive DC bus voltage
by Q1 and Phase V is connected to ground by Q4, Phase W is unpowered. Two flux vectors
are generated by phase U (red arrow) and phase V (blue arrow). The sum of the two vectors
give the stator flux vector (green arrow). Then the rotor tries to follow the stator flux. As soon as
the rotor reaches a given position, the hall sensors state changes its value from “010” to “011” a
new voltage pattern is selected and applied to the BLDC motor. Then Phase V is unpowered
and Phase W is connected to the ground, resulting in a new stator flux vector ‘Step2’.