The invention relates to an air induction coil (20) for high powers formed by winding hollow bars of electrically conductive material. The coil comprises at least two windings (21, 22, 23) arranged coaxially and one inside the other, the windings being connected in series so as to maintain the same winding direction, the induction coil having a radius A means, a half-section in a plane comprising the axis of the coil which is square-shaped side B, so as to satisfy the relationship: 2A = 6B = 6A.
展开▼
