A rotor for an aircraft is described having: a support angularly fixed with respect to an axis and housing a power source; a unit rotatable about axis and housing an electrical load of the resistive type; and a power supply system for the electrical load (21, 24) and comprising: a first transformer electrically interposed between the power source and the load; the first transformer comprises: a first winding arranged on the support and a second winding arranged on the unit, a stator carried by the support, rotationally fixed with respect to axis and to which the first winding is fixed; and a rotor operatively connected to the unit and to which the second winding is fixed; the power supply system comprises a capacitive circuit electrically connected to the first transformer, so as to reduce the reactive power absorbed by the rotary transformer.

Coil surfaces of a first coil (1) and a second coil (3) are parallel in a state of having an interval therebetween. When the first coil (1) rotates, a combined inductance by the first coil (1) and the second coil (3) changes.

A variable inductance inductor includes an inductor unit having a coil pattern; and at least one inductance controlling unit configured to vary a contact area between the coil pattern and a moveable conductor unit to change a current path.

A variable inductance inductor includes an inductor unit having a coil pattern; and at least one inductance controlling unit configured to vary a contact area between the coil pattern and a moveable conductor unit to change a current path.

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.

A coil part includes: a bobbin including a flange part constituting a winding frame part around which a lead wire is to be wound; a core attached to the bobbin; and a core pressing part which is provided integrally with the flange part, includes a pressing plate part facing the flange part to form a first gap, and presses the core between the flange part and the pressing plate part by inserting at least a part of the core into the first gap.

An adjustable inductor including a toroidal core defining a plurality of gaps, a compressible gap material positioned in the gaps, at least one winding wound on the core, a force-applying structure, and a film substantially covering the adjustable inductor. The force-applying structure is operable to apply a force to the core to adjust the gaps and thereby an inductance of the adjustable inductor. The film is configured to prevent movement of force-applying structure when above a predetermined temperature threshold, and allow movement of the force-applying structure when below the predetermined threshold.

An adjustable inductor including a toroidal core defining a plurality of gaps, a compressible gap material positioned in the gaps, at least one winding wound on the core, a force-applying structure, and a film substantially covering the adjustable inductor. The force-applying structure is operable to apply a force to the core to adjust the gaps and thereby an inductance of the adjustable inductor. The film is configured to prevent movement of force-applying structure when above a predetermined temperature threshold, and allow movement of the force-applying structure when below the predetermined threshold.

A rotary variable differential transformer for measuring angular displacement and method of manufacturing the same are provided herein. The rotary variable differential transformer includes a stator configured to house a primary coil configured to receive an alternating current, a first secondary coil electromagnetically coupled to the primary coil, and a second secondary coil electromagnetically coupled to the primary coil. The rotary variable differential transformer also includes a rotor positioned concentrically within the stator. The rotor is configured to receive a shaft and rotate with the shaft while the stator remains stationary. The primary coil is positioned at a first radial position within the stator spaced between about 90 to 150 degrees from each of the first secondary coil and the second secondary coil.

A rotary variable differential transformer for measuring angular displacement and method of manufacturing the same are provided herein. The rotary variable differential transformer includes a stator configured to house a primary coil configured to receive an alternating current, a first secondary coil electromagnetically coupled to the primary coil, and a second secondary coil electromagnetically coupled to the primary coil. The rotary variable differential transformer also includes a rotor positioned concentrically within the stator. The rotor is configured to receive a shaft and rotate with the shaft while the stator remains stationary. The primary coil is positioned at a first radial position within the stator spaced between about 90 to 150 degrees from each of the first secondary coil and the second secondary coil.