Electric machine having a low-mass design in magnetically active parts

A vehicle including an electric machine which comprises

• a first magnetic pole comprising an arrangement of layers having magnetically active layers with a total volume (Va) and magnetically inactive layers with a total volume (Vi) which have a lower average density than the magnetically active layers, wherein the magnetically active layers and the magnetically inactive layers repeat in a specified order with a period p, and wherein a ratio (k) of the total volume (Va) of the magnetically active layers to the combined total volume (Va+Vi) of the magnetically active layers and the magnetically inactive layers fulfills the condition 0.5≦k≦0.8,
• a second magnetic pole confronting the first magnetic pole and movable relative to the first magnetic pole, and
• a gap having a length (lS) extending between an end of the first magnetic pole and an end of the confronting second magnetic pole in a direction parallel to a magnetically active or magnetically inactive layer, and
• an electrical conductor constructed as a coupling element between an electrical circuit and a magnetic circuit,
• wherein at an operating time, the magnetic circuit comprises the first magnetic pole, the gap and the second magnetic pole, and is permeated by a common useful magnetic flux for electromechanical energy conversion.

A wind turbine including an electric machine which comprises

• a first magnetic pole comprising an arrangement of layers having magnetically active layers with a total volume (Va) and magnetically inactive layers with a total volume (Vi) which have a lower average density than the magnetically active layers, wherein the magnetically active layers and the magnetically inactive layers repeat in a specified order with a period p, and wherein a ratio (k) of the total volume (Va) of the magnetically active layers to the combined total volume (Va+Vi) of the magnetically active layers and the magnetically inactive layers fulfills the condition 0.5≦k≦0.8,
• a second magnetic pole confronting the first magnetic pole and movable relative to the first magnetic pole, and
• a gap having a length (lS) extending between an end of the first magnetic pole and an end of the confronting second magnetic pole in a direction parallel to a magnetically active or magnetically inactive layer, and
• an electrical conductor constructed as a coupling element between an electrical circuit and a magnetic circuit,
• wherein at an operating time, the magnetic circuit comprises the first magnetic pole, the gap and the second magnetic pole, and is permeated by a common useful magnetic flux for electromechanical energy conversion,
• the wind turbine further comprising a blade that is mechanically coupled to a rotor of the electric machine.