Winding for an electrical machine having an inductor with pole pitch τp, having a plurality of groups of turns intercepting a fraction of a magnetic field, each group comprising a first subgroup of turns and a second subgroup of turns of same phase at a distance equal to τp, the turns of the first subgroup being connected in such a way that a current may flow in same direction in all turns of said subgroup, the turns of the second subgroup being connected in such a way that a current may flow in same direction in all turns of said subgroup, a turn of the first subgroup being connected to a turn of the second subgroup in such a way that the direction of said current in the first group is opposite to the direction of the current in the second subgroup. The winding is a wave winding comprising vertical shortcut connections.