A fluid machine includes a rotary blade, a casing configured to house the rotary blade therein, and an insulation coated conductor attached within a recess circumferentially provided in an inner circumference of the casing opposed to an outer end of the rotary blade, the insulation coated conductor including a conductive wire and an insulation material coating. The dielectric barrier discharge is generated between the insulation coated conductor and the outer end of the rotary blade by applying a pulse voltage between the conductive wire and the rotary blade, so as to prevent leakage of operative fluid through a tip clearance between the inner circumference of the casing and the outer end of the rotary blade.

A power transmitter provided according to one aspect of the present disclosure includes a high-frequency power source device, a power transmitting unit, and a transmitter-side controller. The high-frequency power source device generates high-frequency power. The power transmitting unit includes a power-transmitting coil. The power transmitting unit wirelessly transmits the high-frequency power received from the high-frequency power source device to a power receiver mounted on an electric vehicle. The transmitter-side controller calculates a transmitter usage rate. The transmitter-side controller causes the power transmitting unit to stop power transmission in response to the transmitter usage rate exceeding a predetermined threshold. The transmitter usage rate indicates a rate of time during which the power transmitting unit transmits power to the power receiver per unit time.

According to some implementations, an apparatus for transmitting charging power wirelessly to a load is provided. The apparatus comprises at least one ferrite structure comprising a first ferrite portion, a second ferrite portion comprising at least a first ferrite leg, a second ferrite leg, and a third ferrite leg, each physically separated from the first ferrite portion by a first distance, and a third ferrite portion positioned between the second ferrite leg and the first ferrite portion and physically contacting the second ferrite leg. The at least one ferrite structure further comprises a coil wound around the second ferrite leg and configured to generate an alternating current under influence of an alternating magnetic field.

A position alignment method performed by a ground assembly for wireless power transfer includes measuring, through at least one low frequency (“LF”) receiver of the ground assembly, a first magnetic flux density for a magnetic field emitted from at least one LF transmitter of a vehicle assembly; measuring, through the at least one LF receiver, a second magnetic flux density for a magnetic field emitted from the at least one LF transmitter; configuring a received signal measurement based on a comparison result of the first magnetic flux density and the second magnetic flux density; and providing the configured received signal measurement to a vehicle.

In a system for an inductive energy transmission from a primary-conductor system, in particular a stationary primary conductor system, to a vehicle having a secondary winding, the secondary winding is inductively coupled with the primary-conductor system. The primary conductor is installed as a primary-conductor loop installed in elongated form, which has a feed conductor and a return conductor in a line section, in particular a return conductor that is installed parallel thereto, and the return conductor is electrically grounded in that at least one inductance is disposed between the return conductor and the electrical ground.

Inductive power transfer with reduced electromagnetic interactions within a conductor arrangement The invention relates to a conductor arrangement (90) for an inductive power transfer, the conductor arrangement (90) comprising at least three coils (92, 94) that are arranged along a longitudinal axis (LO) and that are formed of at least one conductor, wherein the conductor arrangement (90) comprises at least two winding heads (W) that are arranged opposite to one another and in which conductor sections of each of the coils (92, 94) extend along one another as well as along the longitudinal axis (LO), wherein, within at least one of the two winding heads (W), the conductor sections of a first and second coil (92) that extend along the longitudinal axis (LO) are arranged at a first distance (D1) to one another, the first distance (D1) being equal to or larger than zero, and the conductor section of the third coil (94) that extends along the longitudinal axis (LO) is arranged at second distances (D2) to said conductor sections of the first and second coil (92) the second distances (D2) being larger than the first distance (D1). Further, the invention relates to an inductive power transfer C arrangement (100) and methods for providing conductor arrangements (90) for an inductive power transfer.

Feed system provided with feed means located inside a lyophilization chamber and able at least to supply electric energy to a slider, autonomously mobile at least inside the lyophilization chamber, and to the possible other internal components which need the energy present in or associated to the slider. The feed means are positioned along the travel of the slider and cooperate with energy receiver means associated to the slider, being static at least during the loading and unloading steps of at least a loading plane.

A road bearing for inductive coupling to an electrical connection device of an electric vehicle includes a series of primary induction coils, a bearing surface element, and a plurality of deformation features in the bearing surface element. The series of primary induction coils are interconnected to a source of electrical power and disposed in a substantially linear array below a roadway surface and within a roadway structure, and are aligned generally parallel to an alignment of the roadway. The bearing surface element is disposed above the primary induction coils, and has an upper surface that is substantially flush with the roadway surface, has a surface flatness in the range of ±1 μm per 30 mm, and a magnetic permeability in the range of 0.9 to 2. The plurality of deformation features include depressions in the upper surface of the bearing surface element, and are configured to provide friction to vehicle wheels.

A method for influencing the efficiency of an electrical grid includes coordinating operation of a first electrified vehicle and a second electrified vehicle traveling along an inductive roadway and having opposite power needs in a manner that influences an amount of energy supplied by the electrical grid during an inductive roadway event.

A method includes detecting that a wireless charging-capable vehicle is in a charging position proximate a primary coil of a wireless charging system that is operable to wirelessly charge the vehicle via a secondary coil installed in the vehicle. The primary coil includes a top coil and a bottom coil that are substantially parallel to one another, the top coil and the bottom coil coupled to one another via a plurality of cross-coil junction units each including a switching element that routes electric current through at least a portion of one or more of the top coil and the bottom coil. The method further includes setting the switching elements such that current flowing through the primary coil produces an optimal angle of magnetic flux for wirelessly charging the vehicle given a position of the primary coil with respect to a position of the secondary coil, and causing electric current to flow through the primary coil according to the set switching elements to wirelessly charge the vehicle.