17results about "Continuously variable inductances/transformers" patented technology

A method of controlling the magnetic saturation of the core of a DC common mode choke comprising a magnetic core 1 and first and second coils 2, 3, comprises: determining the saturation percentage of

The invention relates to a coil apparatus for an inductive receiving apparatus, including a first coil with a plurality of first turns and a second coil with a plurality of second turns, wherein the first and the second coils are connected to one another in series and are wound in opposite directions relative to each other, wherein each turn includes an internally arranged conductor section and an externally arranged conductor section. With the objective of improving the interoperability of the coil apparatus, a portion of the first and second turns include respectively the internally and externally conductor section arranged such that the first and second turns respectively lie in one plane or span one plane, wherein these planes diverge with respect to one another in the direction from the first coil to the second coil or vice versa, depending on whether the conductor sections are in the portion of the first turns or of the second turns.

The invention discloses a high-frequency power inductance device with a self-adaptive heat dissipation function, which comprises a protective frame, an overhead cover plate is arranged at the upper end of the protective frame, mounting grooves are formed in the inner sides of the protective frame and the overhead cover plate, a placement plate is movably connected between the protective frame and the overhead cover plate, and the placement plate is movably connected with the protective frame and the overhead cover plate. The number of the placing plates is two, and the two placing plates are symmetrically distributed. The middle shaft rod drives the rotating bevel gear, the multiple sets of linkage bevel gears and the threaded rod to rotate synchronously, so that the position of the movable frame is changed according to rotation of the threaded rod, and in the moving process, the different spacing distances of the two guide plates are accurately controlled and adjusted; according to the inductance device, the winding mode and direction of the wire on the outer side of the guide plate can be flexibly operated according to actual requirements, meanwhile, the limiting inclined faces effectively prevent the wire from being dislocated and falling off, the applicability and flexibility of the inductance device are greatly improved, and diversified use scenes are met.

The application relates to the technical field of antenna matching and tuning devices, in particular to a medium wave antenna matching assembly based on double helix inductors, which comprises a shell, a coil set arranged in the shell, a movable magnetic core rod, a lead screw, a variable capacitor, a mounting plate, a coarse tuning knob, a fine tuning knob, an antenna interface and a speed reducer; wherein an operation table is arranged on the shell, the coarse tuning knob and the fine tuning knob are arranged on the operation table; the coil set comprises a first double helix inductor, the magnetic core rod is arranged along the axial direction of the first double helix inductor and can axially move relative to the first double helix inductor; the lead screw is arranged in the shell and is in transmission connection with the magnetic core rod, the coarse tuning knob is in transmission connection with the lead screw so as to drive the magnetic core rod to perform coarse tuning; the variable capacitor is arranged on the mounting plate, the fine tuning knob is in transmission connection with the variable capacitor through the speed reducer so as to perform fine tuning on the variable capacitor; and the antenna interface is arranged on the shell and is electrically connected with the first double helix inductor and the variable capacitor to form an antenna matching network.

The application relates to the technical field of adjusting devices, and discloses a self-adaptive reactance adjusting device for a variable current voltage regulator, which comprises a screw cap, a containing cavity arranged in the screw cap, and a rotating rod, the screw cap is sleeved on the outer surface of the rotating rod and can rotate with the central axis of the rotating rod as the rotation center, and the rotating rod is arranged to rotate simultaneously with the rotating rod when the screw cap rotates. When the semicircular ring can move along the diameter direction, the friction block can be driven to move along the diameter direction of the semicircular ring, the friction block is driven to move close to or away from the friction ring by the semicircular ring, the force of the friction block abutting against the friction ring is increased or decreased, the size of the friction force during movement is changed, the operator can know that the generated friction resistance is different under different gear positions, the operator can notice the adjusting range and proportion, the operator can be prevented from making mistakes, and it is ensured that no error occurs in subsequent reactance adjustment.

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

A superconducting integrated circuit is fabricated by depositing a ground plane to at least partially overlie a substrate, depositing an insulating layer to at least partially overlie the ground plane, depositing a superconducting layer to at least partially overlie the insulating layer, and forming a superconducting feature in the superconducting layer. An inductance of the superconducting feature is tunable by adjusting a bias current in the ground plane. The ground plane is electrically communicatively coupleable to an electrical ground. Depositing a ground plane includes depositing a first superconducting material to at least partially overlie the substrate and depositing a second superconducting material to at least partially overlie the first superconducting material. A second critical current density of the second superconducting material is higher than a first critical current density of the first superconducting material.

To provide a magnetic component that can easily control leakage inductance.SOLUTION: A magnetic component includes a core including first and second protrusions extending in a first direction, a first conductor including a first flat wire that defines a first turn that extends around the first protrusion such that a smallest dimension of the first flat wire is parallel or substantially parallel to the first direction, and a second conductor including a second flat wire that defines a second turn that extends around the second protrusion such that a smallest dimension of the second flat wire is parallel or substantially parallel to the first direction. The first and the second turns are adjacent to each other and are off set in two dimensions to define a gap between adjacent turns of the first and the second conductors.SELECTED DRAWING: Figure 3

The pulse power circuit (30, 31, 32) includes an inductor (55) having a hybrid core including a switch magnetic material positioned and selected to function as a magnetic switch and a damping magnetic material positioned and selected to damp energy reflections without interfering with the function of the switch magnetic material as a magnetic switch, such that the circuit can mitigate reflected energy induced resonance without significantly degrading the switching function as part of a saturable reactor inductor.

Inductive position sensor (100) configured to detect a relative position between a first link and a second link, the inductive position sensor (100) comprising: a transmitting antenna (102) which is designed to be arranged on the first member, wherein the transmitting antenna (102) has at least one transmitting winding; a receiving antenna (104) designed to be arranged on the first member, wherein the receiving antenna (104) has one or more receiving windings (103, 105); a coupling element (107) that is operational, being arranged on the second member; a processing circuit (110) configured to provide one or more signals (123, 125) indicating the position of the first element relative to the second element, based on a current induced in one or more receiving windings (103, 105) as a result of an oscillating signal provided to the at least one transmitting winding; and at least one electrostatic shield (210, 212), wherein the electrostatic shield (210, 212) comprises a plurality of conductor tracks arranged such that no current loops are formed in the electrostatic shield (210, 212), wherein the inductive position sensor (100) comprises a first electrostatic shield (210) and a second electrostatic shield (212), wherein one or more layers (202, 204) associated with the transmitting antenna (102) and the receiving antenna (104) are arranged between the first electrostatic shield (210) and the second electrostatic shield (212).

A high efficiency wide-voltage-gain power conversion system and method is disclosed. The system includes a variable-inverter-rectifier-transformer (VIRT) having four pairs of switches forming four half-bridges. Each pair of switches has a top and bottom switch, with the top switch being in one state of “on” and “off” and the bottom switch being in the other state. The states of the four pairs is described by a vector associated with a segment voltage output by the VIRT. The system also includes a converter having a transformer communicatively coupled to the VIRT such that cycling the VIRT through a sequence of vectors generates a waveshape that drives a flux inside a center post of the transformer. The VIRT interfaces with a first voltage, and the converter interfaces with a second. At least one of the input and output voltages varies across a wide voltage range.

To provide an electronic device having a magnetic core with reduced iron loss.SOLUTION: The electronic device includes a magnetic core 10 composed of a soft magnetic material, and a bias magnetic field application part 20 for applying a bias magnetic field in a direction perpendicular to the excitation direction of the magnetic core 10. Due to the bias magnetic field of the bias magnetic field application part 20, the excitation direction of the magnetic core 10 becomes the magnetization hard axis direction, the B-H curve changes, and the hysteresis loss becomes zero. In addition, in the electronic device, since the excitation direction of the magnetic core 10 is the magnetization hard axis direction, the domain wall motion of the magnetic core 10 due to an external magnetic field different from the bias magnetic field does not occur, and the eddy current loss caused by the domain wall motion becomes zero.SELECTED DRAWING: Figure 1

The invention discloses a stress response type adjustable magnetic resistance inductor of a magnetic integrated inductor suitable for a wide load working condition, which relates to the technical field of power electronics and comprises an adjustable magnetic resistance module, a piezoelectric driving component, a working condition detection module and a main body magnetic core, the adjustable magnetic resistance module is assembled on the main body magnetic core and comprises a PZT regulation and control layer, an insulating layer and an electrode layer; the PZT regulation and control layer comprises a plurality of layers of piezoelectric material sheets and a plurality of layers of ferromagnetic material sheets, the piezoelectric material sheets and the ferromagnetic material sheets are alternately stacked, and the piezoelectric material sheets are stress-controllable magnetic resistance materials and are used for adapting to stress-magnetic resistance response characteristics required by wide-load working conditions; the insulating layer is used for isolating the PZT regulation and control layer from the electrode layer; the electrode layer material adopts a flexible composite structure design and is tightly attached to the piezoelectric driving assembly, and the piezoelectric driving assembly is connected with the working condition detection module. According to the invention, rapid, continuous and mechanical-motion-free dynamic adjustment of the inductance value is realized, and meanwhile, the advantage of high power density of magnetic integration is maintained.

The invention belongs to the field of electrical engineering, and relates to an inductance technology, in particular to an adjustable inductor and application thereof. The device specifically comprises an inductance component, an adjusting component, a measuring component and a support. Inductance adjustment is achieved by controlling the rotating ring to rotate relative to the fixed ring, smooth and stepless change of the overlapping area between the rotating ring and the fixed ring can be guaranteed by means of the continuous and stepless characteristics of torque, higher inductance adjustment precision is achieved, the advantages of being good in adjustment linearity and wide in adjustable range are achieved, and therefore the application range of the inductor is expanded. By integrating the measuring parts, the rotating angle of the rotating ring can be measured through the clamp output shaft, the inductance value is obtained in real time through calculation, the purpose of measuring the inductance value in real time through an indirect measuring method is achieved, and the application function of the adjustable inductor is more complete compared with the prior art; and the requirements of current electrical equipment on high precision, integration and dynamic tuning are met.

A tunable inductor includes an annular magnetic core defining a plurality of gaps, a compressible gap material located in the gaps, at least one winding wound around the magnetic core, a force application structure, and a film substantially covering the tunable inductor. The force application structure is operable to apply a force to the magnetic core to adjust the gap and thereby adjust the inductance of the adjustable inductor. The membrane is configured to prevent movement of the force application structure when above a predetermined temperature threshold and to allow movement of the force application structure when below the predetermined threshold.

The invention relates to the technical field of adjusting devices, and discloses a self-adaptive reactance adjusting device for a variable-current voltage regulator, which comprises a turncap, an accommodating cavity and a rotating rod are arranged in the turncap, the turncap sleeves the outer surface of the rotating rod and can rotate by taking the central axis of the rotating rod as a rotating center, and the rotating rod is arranged in a way that when the turncap rotates, the turncap can rotate around the central axis of the rotating rod. And the rotating rod can be driven to rotate simultaneously. When the semicircular ring can move in the diameter direction of the semicircular ring, the friction block can be driven to move in the diameter direction of the semicircular ring, the friction block is driven by the semicircular ring to move close to or away from the friction ring, the force of the friction block abutting against the friction ring becomes larger or smaller, and therefore the friction force during movement is changed; according to the utility model, an operator can know that the generated frictional resistance is different under different gears, so that the operator can notice the adjustment amplitude and proportion, the operator is prevented from making mistakes, and the subsequent reactance adjustment is ensured not to have errors.

The utility model discloses a wide-range adjustable inductance tuning device which comprises an output copper piece and a parallel frame, and two fixed coils are arranged on the output copper piece up and down; the parallel frame is mounted on one side of the output copper piece; two magnetizers capable of performing lifting motion through belt wheels are arranged on the parallel frame up and down, and in the lifting process of the magnetizers, the two magnetizers smoothly enter and exit in the two fixed coils in a one-to-one correspondence mode. According to the wide-range adjustable inductance tuning device, inductance can be adjusted without disassembly, high-power high-low-frequency equipment can be flexibly and widely tuned, the frequency control requirement for load output is met, the design structure is simple, and operation is safe and reliable.