Abstract: A magnetic core for a rotary transformer, the core including bars arranged along a longitudinal axis of the core and at least two cheeks that are axially spaced apart from each other and that extend radially from the bars in order to cooperate with the bars to define at least one annular groove for receiving a toroidal coil, each cheek being made up of a packet of circular magnetic laminations that are arranged radially, and each bar being made up of a plurality of stacks of magnetic laminations, the stacks of laminations forming the bars being arranged axially and being assembled to the packets of circular laminations while being angularly spaced apart from one another around the longitudinal axis of the core.

Abstract: A magnetic core for a rotary transformer, the core comprising including bars arranged along a longitudinal axis of the core and at least two cheeks that are axially spaced apart from each other and that extend radially from the bars in order to cooperate with the bars to define at least one annular groove for receiving a toroidal coil, each cheek being made up of a packet of circular magnetic laminations that are arranged radially, and each bar being made up of a plurality of stacks of magnetic laminations, the stacks of laminations forming the bars being arranged axially and being assembled to the packets of circular laminations while being angularly spaced apart from one another around the longitudinal axis of the core.

Abstract: A method for cooling an electricity generator (50) for delivering electricity to a first rotor (60), the first rotor being suitable for being rotated relative to a stationary structure, the method being characterized in that the electricity generator is placed in a chamber (62) arranged inside the first rotor, and in that it comprises the following steps: a) transferring heat produced by the generator to a cooling fluid, thereby vaporizing the fluid in an evaporator (64); b) transporting the vaporized fluid to a condenser; and c) condensing the fluid in the condenser, the heat delivered by the fluid being transmitted to the air surrounding the condenser.