3-phase electric motor, field visualization

Visualiation of a 3-phase electric motor. Three current-driven magnets surround the central permanent magnet that drives the motor wheel. The oscillating fields of the three outer magnets have a relative phase shift of one third. The superimposed magnetic field lines are shown (green), together with the field strength integrated along the line-of-sight (diffuse light). The current vs. time functions of the individual magnets are shown on the left, as well as the motor rotation. [unfortunately, the youtube compression heavily compromises the video quality]