With a load angle of 15 the rotor can spin. First the motor does not move, then it vibrates , then it vibrates more, and finally
it spins really fast. Basically the algorithm is working, the problem is the initial rotor position angle.
When the rotor is mechanically located where the angle is 0° it starts running inmediately
(it was determined by setting the volatage S1S2S3=100 and taking note of the final position of the motor ).