Abstract: A detection unit has a detection element for detecting a change of magnetic field according to a rotation of a magnet, and an angle calculator for calculating an angle signal according to a detected physical quantity detected by the detection element. Further, a storage stores a plurality of correction values for correcting detection error of the angle signal, and another storage stores a plurality of correction values for correcting detection error of the angle signal. An abnormality determiner determines abnormality of the correction values, an another abnormality determiner determines abnormality of the correction values. A control calculator performs a control calculation by using the angle signals corrected by using the correction value having been determined as normal.

Abstract: Techniques for force sensing in additive fabrication are provided. According to some aspects, an additive fabrication device may include a force sensor configured to measure a force applied to a build platform during fabrication. A length of time taken for a layer of material to separate from a surface other than the build platform to which it is adhered may be determined based on measurements from the force sensor. Subsequent additive fabrication operations, such as subsequent motion of the build platform, may be adapted based on the determined length of time.

Abstract: A method for additive manufacturing of an article having a controlled magnetic anisotropy includes: forming a metallic layer of the article using additive manufacturing, the metallic layer having a magnetic anisotropy aligned in a first direction; forming a subsequent metallic layer of the article using additive manufacturing, the subsequent metallic layer having the magnetic anisotropy aligned in a second direction different from the first direction; and repeating the forming of subsequent metallic layers of the article to form at least a portion of the article, each subsequent metallic layer having the magnetic anisotropy aligned in a different direction than a previous metallic layer.

Abstract: A position sensor (1.1, 1.2) for a working cylinder (2.1, 2.2) with a cable drum (4.1, 4.2), a cable (5) with a piston anchor (7.1, 7.2) and an interface (13.1, 13.2) for determining a position and a movement of a piston (3.1, 3.2) of the working cylinder (2.1, 2.2), the position sensor (1.1, 1.2) is to be operatively connected to the working cylinder (2.1, 2.2) from outside in the area of a cylinder head (15.1, 15.2).

Abstract: 1. A device for the contactless distance and/or position determination of a measurement object (1), with an electrically conductive measurement object (1) and with a sensor (3) operating in particular according to the inductive, capacitive or the eddy current principle, wherein the sensor (3) comprises a measurement device (4), characterized in that the measurement device (4) is formed by at least two measurement elements (5, 5?, 5?) which are spatially separated from each other. Moreover, a corresponding sensor (3) is indicated.

Abstract: An apparatus, having: a pressure differential sensor apparatus (100) configured to detect a pressure difference between two locations; a faceplate (102) having a base (104) and a protrusion (106) from the base, the protrusion comprising a light-transmissive perimeter (116) configured to transmit light forward and laterally; and a circuit board (400) having an indicator light (402) mounted thereon and configured to emit light into the light-transmissive perimeter, the indicator light further configured to emit a first color under first pressure difference conditions and a second color under second pressure difference conditions.

Abstract: An electric control device for actuating an actuator may include an electric motor including a rotor for driving the actuator and a substantially cylindrical stator housing having an axial lower side and a circumferential shell. The axial lower side may merge into the circumferential shell via a circumferential edge. The control device may also include an equipment housing including a substantially cylindrical motor mounting which at an axial end is sealed by a mounting bottom and in which the electric motor is arranged with the axial lower side facing the mounting bottom. On the axial lower side, a central, axially projecting motor end portion may be disposed. In the motor mounting between the circumferential shell of the stator housing and the equipment housing, an annular space may be defined. The annular space may be at least partly filled with an adhesive which attaches the stator housing to the equipment housing.

Abstract: The present invention uses a magnetic source and pressure sensors mounted against a surface. Based on the mass of metal inside a volume, the magnetic source is attracted to the surface and exerts pressure on the pressure sensor that is proportional to the mass of metal being detected. An electronic device reads the pressure value and uses the information to quantify the metal in the surface or inside the volume of the construction component.

Abstract: A sensor device for sensing a torque being applied to an object is provided. The sensor device comprises a first inductance arrangement having a first coil with a corresponding main sensing direction and a capacitance arrangement. The capacitance arrangement together with the first inductance arrangement forms a resonant circuit having a corresponding resonance frequency. The first coil is oriented so as to have the corresponding main magnetizing directions oriented toward an object to be sensed.

Abstract: This disclosure relates to a method of and a system for fault detection and localization of a fault in a DC-system comprising multiple serially connected DC-sources. The method may comprise an act of connecting a test apparatus to at least one terminal of the DC-system and to DC-system ground. The method encompasses at least one repetition of an act of applying a test AC-signal to one terminal of the DC-system, an act of detecting the response AC-signal to the test AC-signal on either one terminal alone and/or on DC-system ground; and an act of comparing the test AC signal with the response AC-signal to detect a fault and the location of the fault in the DC-system. The system comprises a fault detection and localization apparatus configured to perform the method disclosed.

Abstract: A sensor device includes a plurality of sensor elements and an output circuit in one sensor part, and a correction value calculator in an ECU, which obtains output signals from the sensor part and calculates an offset correction value based on a plurality of signal values that correspond to a detection value when a calculability condition is satisfied. The ECU also includes a control calculator that performs a calculation based on the corrected signal values that have been corrected by the offset correction value. Therefore, the offset correction value is calculated in view of an aging and an accuracy variation of the components used in the sensor device. In such manner, the detection value is appropriately corrected for the calculation.

Abstract: The invention provides a clutch seal which can enhance a durability of a membrane portion which is a constituting part of a seal and is constructed by a rubber-like elastic body, and can inhibit a working fluid from standing in a concave surface of the membrane portion. The clutch seal of the invention is an annular seal interposed between a clutch plate in a dry clutch and a piston pressing the clutch plate, has a middle ring fixed to the piston between an outer ring and an inner ring which are fixed to a clutch housing, and has membrane portions constructed by a rubber-like elastic body respectively between the outer ring and the middle ring and between the inner ring and the middle ring, wherein the middle ring is arranged at an intermediate position of a stroke in an initial shape of the membrane portion.

Abstract: This fluid pressure sensor includes a coil the self inductance of which varies as a function of the pressure of a fluid inside the flexible pipe. This coil includes a turn including: a first portion and a second portion of its periphery rigidly mechanically connected to a first location and a second location on the periphery of the pipe, respectively, and third and fourth free portions of the periphery of the turn situated between the first and second portions and each on a respective side of a central axis of the pipe and each separated from the flexible pipe by a clearance.

Abstract: A pressure transducer is disclosed wherein no wetted areas have been welded. A cavity is milled into the back of each of the blocks of a material which will make up the body of the transducer. Pickup coils are placed into these cavities and are held in place generally with epoxy cement. With the coils mounted within the sensor body, the surface which will be exposed to the sample or reference fluids is comprised of a single, solid material with no welding joints. Further, as the sensor block half is made of a single, solid material, fluid fitting connections may be machined directly into the body. The pickup coil placed within the improved sensor body may be wound on an open frame of nickel superalloy (NiSA). Another embodiment involves coating or encapsulating the sensing membrane within a soft, non-magnetic material protecting it from corrosion.

Abstract: A load sensor unit is provided which is less likely to suffer from hysteresis errors. The magnetic load sensor unit includes a flange member, a support member supporting the flange member from the axially rearward side, a magnetic target fixed to the flange member, a magnetic sensor fixed to the support member. The magnitude of the load is detected based on the magnetic flux detected by the magnetic sensor. A load acting surface of the flange member to which the load is applied is formed at a position offset axially rearwardly relative to an axially forward surface of the flange member.

Abstract: A cylinder length sensor mounting and retaining assembly for a hydraulic cylinder includes a casing attachable to a blind end of the cylinder, a sensor retention cap affixable to the casing adjacent the blind end of the cylinder, and a locking pin extendable through the casing and positioned adjacent the sensor retention cap. The assembly facilitates sensor removal without requiring disassembly of the cylinder.

Abstract: A system and method for actively controlling a structure is disclosed. At least one non-optimal event is identified in real-time based on at least one real-time elasticity measurement, if an event threshold exceeds a predetermined value. In response to an active control command, a control mechanism is then activated in real-time to compensate for the non-optimal event.

Abstract: The present document relates to a method and system for dimming low power illumination devices, such as LED (Light Emitting Diode) assemblies. A controller for a driver circuit of a light source is described. The driver circuit controls a plurality of illumination states of the light source using a power converter, which converts power from an input voltage waveform of a mains power supply into a drive signal for the light source. The controller comprises an event detection unit; a state register to store an indication of a current state of the illumination states; a state processor to determine a target state of the illumination states, based on the detected event and based on the current state; and an output control unit controls the power converter of the driver circuit to provide a drive signal for the target state.

Abstract: A magnetoresistive effect element includes a pair of first soft magnetic layers that are arranged opposite to each other so as to sandwich a magnetoresistive effect film; a second soft magnetic layer; and a coil that is windingly formed about the second soft magnetic layer. When a rear end region cross-sectional area of the first soft magnetic layers is defined as S1r and a tip end region cross-sectional area of the second soft magnetic layer is defined as S2f, S2f>S1r is established, and when a tip end width of the first soft magnetic layers is defined as W1f and a rear end width of the first soft magnetic layers is defined as W1r, W1r>W1f is established.

Abstract: An input device includes a first yoke; a substrate disposed on the first yoke; a coil disposed on the substrate; and a second yoke disposed above the coil and configured to be displaced downward by a force applied and thereby to change inductance of the coil. The input device is configured to output a signal corresponding to the amount of displacement of the second yoke. The substrate has an opening that communicates with a hollow of the coil, and the first yoke includes a step that is inserted into the opening of the substrate.

Abstract: An electrostatically tunable magnetoelectric inductor including: a substrate; a piezoelectric layer; and a magnetoelectric structure comprising a first electrically conductive layer, a magnetic film layer, a second electrically conductive layer, and recesses formed so as to create at least one electrically conductive coil around the magnetic film layer; with a portion of the substrate removed so as to enhance deformation of the piezoelectric layer. Also disclosed is a method of making the same. This inductor displays a tunable inductance range of >5:1 while consuming less than 0.5 mJ of power in the process of tuning, does not require continual current to maintain tuning, and does not require complex mechanical components such as actuators or switches.

Abstract: A driving circuitry arranged to pass a dead time over an isolation transformer, the driving circuitry constituted of: a three-state driver arranged to output a first signal, the first signal selectively at one of two complementary voltage levels and a high impedance state; a first capacitor, a first end of the first capacitor coupled to receive the first signal; and a first isolation transformer, a first end of a first winding of the first isolation transformer coupled to a second end of the first capacitor.

Abstract: A trimmable inductor assembly is provided for optimal balancing of phase currents in a multi-phase resonant converter. A magnetic device includes first and second core portions defining an outer edge of the device having a first axis, and further defining a first air gap. A bracket is positioned proximate the outer edge of the device and a magnetic plate is coupled to the bracket, with the magnetic plate and the second core portion defining a second air gap. A positioning device is coupled to the bracket and is responsive to control signals based on a detected phase current imbalance to drive the bracket and the magnetic plate between a first position defining a minimum air gap for the assembly and a second position defining a maximum air gap for the assembly.

Abstract: An integrated inductor can be tunable via a control current which alters the magnetic flux density in a permeable magnetic material. The resulting inductor can be adjusted in-circuit, and may be suitable for applications such as dc-dc converters, RF circuits, or filters requiring operation at high frequencies and across wide bandwidths.

Abstract: A system and method for heating a hydrocarbon resource in a subterranean formation having a wellbore extending therein, include the use of a radio frequency (RF) source, an RF antenna to be positioned within the wellbore and a transmission line coupling the RF source and the RF antenna. A tunable choke is positioned on the transmission line between the RF source and RF antenna, and a controller is coupled to the tunable choke. The controller may be configured to tune the tunable choke to reduce a common mode current from propagating on an outside of the transmission line toward the RF source.

Abstract: A liquid micro-electro-mechanical system (MEMS) magnetic component includes a board, a channel, one or more windings, a magnetizing-doped droplet, and a droplet activating module. The channel is implemented or embedding in one or more layers of the board and the one or more windings are proximally positioned to the channel. The magnetizing-doped droplet is contained in the channel and is modified by the droplet activating module based on the control signal. By modifying the magnetizing-doped droplet with respect to the one or more windings changes an electromagnetic property of the liquid MEMS magnetic component.

Abstract: An inductor apparatus includes an inductor winding, a core defining a magnetic circuit for a magnetic flux generated by a current flowing through the inductor winding, at least one permanent magnet magnetically biasing the core by its permanent magnetization, and a magnetization device operable for adjusting a desired magnetization of the permanent magnet. The at least one permanent magnet is arranged within the magnetic circuit of the magnetic flux generated by the current flowing through the inductor winding. The magnetization device includes a magnetization winding and a circuitry configured to subject the magnetization winding to magnetization current pulses, thereby generating at a location of the permanent magnet a magnetic field which is able to change the permanent magnetization of the permanent magnet.

Abstract: A multi-layer, multi-turn structure for an inductor having a plurality of conductor layers separated by layers of insulator is described. The inductor further comprises a connector electrically connected between the conductor layers. The structure of the inductor may comprise a cavity therewithin. The structure of the inductor constructed such that electrical resistance is reduced therewithin, thus increasing the efficiency of the inductor. The inductor is particularly useful at operating within the radio frequency range and greater.

Abstract: A multi-layer, multi-turn structure for an inductor having a plurality of conductor layers separated by layers of insulator is described. The inductor further comprises a connector electrically connected between the conductor layers. The structure of the inductor may comprise a cavity therewithin. The structure of the inductor constructed such that electrical resistance is reduced therewithin, thus increasing the efficiency of the inductor. The inductor is particularly useful at operating within the radio frequency range and greater.

Abstract: A planar light-emitting module lighting circuit uses a lamp comprising an organic electroluminescence layer and electrodes sandwiching the organic electroluminescence layer as a load, and applies a current to the load so as to cause the organic electroluminescence layer to emit light. In the planer light-emitting module lighting circuit, a current at a lighting start time of the lamp is made small as compared with a current at a stationary lighting time at which a predetermined time period has passed since a lighting start.

Abstract: A passive device having a portion in the package substrate and a portion in the system board such that the portions of the device are electromagnetically coupled. A transformer including inductors in the package substrate and system board electromagnetically coupled across a space between the substrate and board that is surrounded by solder balls coupling the substrate and board. A capacitor including plates in the substrate and board electromagnetically coupled across a space between the substrate and board that is surrounded by solder balls coupling the substrate and board. A core material can at least partially fill the space between the substrate and board. The solder balls surrounding the space can be coupled to ground. Metal shielding can be put in the substrate and/or board surrounding the device. The metal shielding can be coupled to the solder balls. The metal shielding can be coupled to ground.

Abstract: An input device includes a first yoke; a substrate disposed on the first yoke; a coil disposed on the substrate; and a second yoke disposed above the coil and configured to be displaced downward by a force applied and thereby to change inductance of the coil. The input device is configured to output a signal corresponding to the amount of displacement of the second yoke. The substrate has an opening that communicates with a hollow of the coil, and the first yoke includes a step that is inserted into the opening of the substrate.

Abstract: A variable inductor is provided. The variable inductor includes a dielectric core having a helical thread on an outer surface thereof for receiving the coil, and a non-magnetic element positioned coaxially within the core. The non-magnetic element could be provided in the form of a bushing or a solid rod, and could be manufactured from any suitable, non-magnetic metal, such as copper, brass, etc.

Abstract: A device for controlling a magnetic flux in an electromagnetic system, wherein the system includes magnetically connected magnetic cores, between which a volume is arranged. The volume includes a controllable magnetic flux region and the magnetic flux region includes a magnetic material having a relative permeability that may be varied by influencing the temperature of the material. The magnetic material includes a magnetic material, the Curie point of which lies within the temperature operating range of the device and exhibits paramagnetic properties within the temperature range. Also a method of controlling a magnetic flux.

Abstract: An operation input apparatus configured to receive a force from an operator, including: a board 10 including a placement surface on which coils 21˜24 are placed, the coils being arranged in a circumferential direction of a circle formed by connecting points apart from a reference point by the same distance; a key 30 that is provided in a side where the force is input with respect to the board 10; and a return spring 51˜54 elastically supporting the key 30, wherein the key 30 includes an opposed surface opposed to the placement surface and an operation surface configured to receive an application of the force, and causes an inductance of at least one of the coils 21˜24 to change with an approach of the opposed surface to the placement surface due to the application of the force on the operation surface.

Abstract: A coil component 1 includes: a pot core 2; a coil 10 for generating magnetic flux when a predetermined electric current is supplied; a piezoelectric actuator 15 for changing the position of a movable core portion 11 with respect to the coil 10 in response to a control signal supplied from the outside and for passing the movable core portion 11 through the magnetic flux of closed magnetic-path, which is generated by the coil 10. Also, the piezoelectric actuator 15 includes: a piezoelectric device 9 for creating displacement in parallel with the thickness direction caused by the control signal, a moving body 11 connected to the piezoelectric device 9 and the movable core portion 11 for moving the movable core portion 11 in response to the displacement which occurred for the piezoelectric device 9, and a friction-drive rod 13 for rendering the moving body 11 moved by the displacement which occurred for the piezoelectric device 9 to be stationary at a predetermined position.

Abstract: The present invention provides a programmable integrated inductor having a compact design, having a dual turn and a parallel programmable impedance. In particular, the impedance value of the programmable changes, like a variable, programmable, as its range may be set to an unlimited number of values. The invention, thus, provides a wider range of programmable values without compromising space, at a constant equivalent given inductor area.

Abstract: A short-circuit indicator is provided for arrangement on an electrical line for electrical power distribution which includes a current transformer. The current transformer has an induction coil and an iron yoke for surrounding the electrical line to be monitored for a short-circuit current. The induction coil is seated on a base web of a U-shaped first yoke part. A second yoke part is connected in the form of a joint which can move between a closed position and an open position to one of two U-limbs of the first yoke part. The second yoke part forms a magnetic return path element for the first yoke part in the closed position. The first yoke part is split into two essentially L-shaped parts in the area of the base web to which the induction coil is fitted.

Abstract: A short-circuit indicator is provided for arrangement on an electrical line for electrical power distribution which includes a current transformer. The current transformer has an induction coil and an iron yoke for surrounding the electrical line to be monitored for a short-circuit current. The induction coil is seated on a base web of a U-shaped first yoke part. A second yoke part is connected in the form of a joint which can move between a closed position and an open position to one of two U-limbs of the first yoke part. The second yoke part forms a magnetic return path element for the first yoke part in the closed position. The first yoke part is split into two essentially L-shaped parts in the area of the base web to which the induction coil is fitted.

Abstract: A DC to DC transmission system includes at least three conductors between a source and a sink, a first switch which alternately connects each conductor to the source, a second switch which alternately connects each conductor to the sink. The switches are synchronized such that one conductor is alternately coupled between the same polarity side of the source and sink and another conductor is alternately coupled between the other polarity side of the source and sink. The alternating connection between the conductors and source and sink may be undertaken at a wide range of frequencies.

Abstract: A target plate 3 is provided onto a shaft 1 and is has targets 3a arranged on an outer circumference. Facing the outer circumference of this target plate 3 is a sensor 5 that is provided with MR elements, which are arranged in a circumferential direction in accordance with an arrangement interval of the targets 3a. A rotational angle of the target plate 3 is calculated based on an output obtained between the MR elements in accordance with the displacement in the circumferential direction of the targets 3a, 3a with the rotation of the target plate 3.

Abstract: A invention relates to a transformer having a primary coil and a secondary coil, with a ferromagnetic core inserted in a coil former. The alternating current resistance of the primary coil (3) drops on reaching a triggering temperature (TC) which lies above the operating temperature but below the softening temperature (TW) of the coil former (6) and/or insulation of coil winding (3, 4). The coil core (5) may consist at least partially of a material with a magnetic permeability which drops when the triggering temperature (TC) is exceeded.

Abstract: The magnetic field of an inductor is decreased by the presence of one or more single loop windings positioned in proximity to the inductor. The single loop windings have open circuits that are selectively closed to magnetically couple the single loop windings to the inductor. A switched inductor/varactor tuning circuit is formed by connecting a varactor to the inductor.

Abstract: A method of controlling the amount of magnetostriction in a magnetostrictive actuator is provided. The method compensates for non-ideal influences, such as imperfections in the magnetostrictive member, prestress, stress or load, quality of the magnetic circuit, and temperature. The method includes selectively energizing the coil to build and maintain a current for generating the magnetizing force; measuring the magnetic flux; and applying the magnetic flux as a feedback variable to control the magnetizing force and thereby control the amount of magnetostriction.

Abstract: Embodiments of the invention include a transformer device having a saturation region for limiting ingress noise and other noise. The transformer comprises a magnetic core, an input coil and an output coil arranged so that the output signal caused by the magnetic linkage between the input and output coils through the magnetic core is based on the magnitude of the input signal. According to an embodiment of the invention, the magnetic core includes a saturation region that limits the output signal regardless of the magnitude of the input signal once the saturation region reaches its saturation magnetization state. The saturation region comprises a reduced saturation magnetization level caused by a geometrically constricted region of the magnetic core or, alternatively, by a modified, magnetic-equivalent region having properties similar to a geometrically constricted region.

Abstract: The invention describes a transformer core of NiZn ferrite material. Said transformer core exhibits low overall losses when it is used in a transformer. Said low losses are attained if the majority of the grains of the sintered ferrite material have a monodomain structure. This is the case if the average grain size is smaller than 2.8 microns. The average grain size of the sintered material preferably ranges of from 1.3 to 2.6 microns. The .delta.-value is preferably less than 4 nm.

Abstract: The present invention pertains to an electrical fault limiter. The fault limiter comprises a first magnetic core. There is also a second magnetic core opposing the first magnetic core. The fault limiter additionally comprises a third magnetic core adjacent the first magnetic core. Also, there is a fourth magnetic core opposing the third magnetic core and adjacent the second magnetic core. The electrical fault limiter also moreover comprises a rotor disposed between the first and second magnetic cores, and the third and fourth magnetic cores. The rotor is rotatable about a rotor axis. The first and second magnetic cores are disposed on a first side of the rotor axis and the third and fourth magnetic cores are disposed on a second side of the rotor axis. Each core has a first arm, a second arm and a body to which the first and second arms are connected. Each body has a superconducting bias coil disposed about it. Each arm has a conduction mode coil disposed about it.

Abstract: The invention is a pressure sensor including a main body including a pressure inlet at and end thereof, a deformable section deformed by a pressure introduced through the pressure inlet, and a non-deformable section maintaining the shape thereof even when supplied with a pressure introduced through the pressure inlet; an amorphous magnetic alloy member having a magnetostriction constant, the amorphous magnetic alloy member being adhered on the deformable section and the non-deformable section; a first permeability detection element for detecting the permeability of a part of the amorphous magnetic alloy member corresponding to the deformable section; a second permeability detection element for detecting the permeability of another part of the amorphous magnetic alloy member corresponding to the non-deformable section; and a yoke for covering the first and the second permeability detection elements; the yoke is adhered on the main body.

Abstract: A differential pressure transducer for measuring external pressures is disclosed. The pressure transducer uses a ferrofluid contained in two interconnecting chambers, enclosed by two non-magnetic spring diaphragms. In this embodiment, two independent inductance series circuits, each comprising a bar magnet, Hall effect sensor and an iron pole piece, measure variations in the volume of ferrofluid in each of the interconnecting chambers. Changes in pressure displace the non-magnetic spring diaphragms causing the volume in each interconnecting chamber to change in a differential manner. The flux path in the series magnetic circuit is distorted by changes in the volume of the ferrofluid, causing changes in the flux density at the sensing area of the Hall effect sensor, this sensor producing an electrical signal proportional to the flux change.

Abstract: An acceleration detector includes a magnetic body movable under acceleration, and a differential transformer having primary coils and secondary coils and arranged so that an output differential is produced between the secondary coils when the movable magnetic body is displaced. The movable magnetic body extends through the primary coils and the secondary coils and has opposite ends protruding from the coils. Leaf springs are provided to support the protruding ends of the movable magnetic body. The case comprises a cylindrical body surrounding the outer periphery of the differential transformer and lids closing openings of the body at both ends thereof. Between the lids and both ends of the movable body predetermined gaps are provided through which a magnetic flux can flow. The leaf springs are secured in position between end faces of the body and the lids.