A new chapter 9 has been added to report KD 718. The title of this chapter is: “Use of a 4-pole motor frame size 160L and a 40-pole armature”. The armature has 40 mechanical poles but four magnetic poles and it can therefore be used in combination with the original 400/690 V, 3-phase winding. The armature has 360 preference positions per revolution and the peak on the cogging torque will therefore bee very low.