272 results about "Inductor windings" patented technology

An integrated magnetic assembly that allows the primary and secondary windings of a transformer and a separate inductor winding to be integrated on a unitary magnetic structure is disclosed. The unitary magnetic structure includes first, second, and third legs that are physically connected and magnetically coupled. The primary and secondary windings of the transformer can be formed on the third leg of the unitary magnetic structure. Alternatively, the primary and secondary windings can be split between the first and second legs. Thus, the primary winding includes first and second primary windings disposed on the first and second legs and the secondary winding includes first and second secondary windings disposed on the first and second legs. The inductor winding may also be formed either on the third leg or it may split into first and second inductor windings and disposed on the first and second legs. In addition, one or more legs may include an energy storage component such as an air gap. This integration of the primary and secondary windings and the inductor winding on the unitary magnetic structure advantageously decouples the inductor function from the transformer function and allows the more optimal design of both the inductor and the transformer. The unitary magnetic structure may be coupled to a full bridge, a half bridge, or a push pull voltage input source to form a DC—DC converter.

A circuit board having an embedded inductor and a process for making the circuit board is provided. In general, the process begins by providing a core structure including a dielectric core layer and a first metal layer on a top surface of the dielectric core layer. The first metal layer is etched to form first inductor windings. A material, such as an epoxy material, including magnetic filler material is deposited over the first inductor windings. Thereafter, a prepreg layer is placed over and attached to the material deposited over the first inductor windings to form the circuit board having the embedded inductor.

An RF blocking filter isolates a two-phase AC power supply from at least 2 kV p-p of power of an HF frequency that is reactively coupled to a resistive heating element, while conducting several kW of 60 Hz AC power from the two-phase AC power supply to the resistive heating element without overheating, the two-phase AC power supply having a pair of terminals and the resistive heating element having a pair of terminals. The filter includes a pair of cylindrical non-conductive envelopes each having an interior diameter between about one and two inches and respective pluralities of fused iron powder toroids of magnetic permeability on the order of about 10 stacked coaxially within respective ones of the pair of cylindrical envelopes, the exterior diameter of the toroids being about the same as the interior diameter of each of the envelopes. A pair of wire conductors of diameter between 3 mm and 3.5 mm are helically wound around corresponding ones of the pair of envelopes to form respective inductor windings in the range of about 16 to 24 turns for each the envelope, each of the conductors having an input end and an output end. The input end of each one of the conductors is coupled to a corresponding one of the pair of terminals of the two-phase AC power supply, and the output end of each one of the conductors is coupled to a corresponding one of the pair of terminals of the resistive heating element.

Method, system and apparatus for monitoring target tissue temperatures wherein temperature sensors are configured as passive resonant circuits each, with a unique resonating signature at monitoring temperatures extending below a select temperature setpoint. The resonant circuits are configured with an inductor component formed of windings about a ferrite core having a Curie temperature characteristic corresponding with a desired temperature setpoint. By selecting inductor winding turns and capacitance values, unique resonant center frequencies are detectable. Temperature monitoring can be carried out with implants at lower threshold and upper limit temperature responses. Additionally, the lower threshold sensors may be combined with auto-regulated heater implants having Curie transitions at upper temperature limits.

A wireless resonant powering device (1) according to the invention comprises a first inductor winding (3), which is arranged to form a transformer (9) with the inductor winding (13) of the energizable load (11). The first inductor winding (3) is arranged to form a resonant circuit (5), which may comprise a suitable plurality of electric capacitances and coils. The components of the resonant circuit (5) are selected such that the magnetic energy received by the inductor winding (13) damps the energy flow in the resonant circuit so that the induced voltage in the inductor winding (13) is substantially constant and is independent of the magnetic coupling between the first inductor winding (3) and the inductor winding 13 at the operating frequency of the driving means (6). The resonant circuit is driven by the driving means (6), comprising a control unit (6c) arranged to induce an alternating voltage between a first semiconductor switch (6a) and a second semiconductor switch (6b). At the output of the transformer (9) an alternating voltage is generated, which is rectified to a DC-voltage by a diode rectifier, filtered by an output capacitance. The resonant circuit (5) is operable on its coupling independent point by the driving means (6). This figure schematically illustrates a situation, where a variable coupling between the first inductor winding (3) and the inductor winding (13) exists. The invention further relates to a wireless inductive powering device, an energizable load, a wireless system and a method for wireless power transfer.

The present invention provides an electromagnetic component formed from adjacent conducting layers of a multi-layer PCB and two additional conducting layers in contact with the PCB. The inventive component includes one or more winding turns formed by connecting the multiple layers of the multi-layer PCB with conductive vias and by connecting the additional conducting layers to respective top and bottom surfaces of the PCB. In one embodiment, one of the conducting layers is soldered to a top conducting layer of the PCB and the other of the conductive layers is soldered to a bottom conducting layer of the PCB, effectively increasing the cross-sectional area of the top and bottom winding layers. In another embodiment, the additional conducting layers are separated from the adjacent conducting PCB layers by a layer of insulation, permitting the additional conducting layers to form separate winding turns. The inventive winding stack can be surface mounted to a PCB, and can be used as an inductor, or in other electromagnetic devices. The winding thus constructed is capable of accepting larger currents with lower resulting temperature increases than windings formed only from PCBs, and are less expensive to manufacture than PCB-only windings.

The turbine engine of the invention is a twin-spool turbine engine, comprising a low-pressure rotor (1) and a high-pressure rotor (2), an alternator (30), comprising an inductor winding (32) and an armature (31), the high-pressure rotor (2) rotating the inductor winding (32) of the alternator (30). The armature (31) is mounted so as to rotate and the low-pressure rotor (1) is connected to clutch means (40) arranged so that the low-pressure rotor (1) drives the armature (31) in a manner that is contrarotational to the inductor winding (32) when the clutch means (40) are engaged.Thanks to the invention, the power for the alternator is taken off in a manner distributed between the LP rotor and the HP rotor.

The invention relates to a corona ignitor device configured to be fixed within a combustion chamber, including a housing extending between an upper end and a lower end of the ignitor device. Inductor windings are received in the housing between the upper and lower ends, and a magnetic shield located between the housing and the inductor windings prevent magnetic flux from emanating out of the ignitor device.

The present invention relates to an integrated magnetics transformer assembly comprising a first magnetically permeable core forming a first substantially closed magnetic flux path and a second magnetically permeable core forming a second substantially closed magnetic flux path. A first input inductor winding is wound around a first predetermined segment of the first magnetically permeable core and a second input inductor winding is wound around a first predetermined segment of the second magnetically permeable core. The integrated magnetics transformer assembly further comprises a first output inductor winding comprising series coupled first and second half-windings wherein the first half-winding is wound around a second predetermined segment of the first magnetically permeable core and the second half-winding is wound around a second predetermined segment of the second magnetically permeable core. A second output inductor comprises series coupled first and second half-windings wherein the first half-winding is wound around a third predetermined segment of the first magnetically permeable core and the second half-winding is wound around a third predetermined segment of the second magnetically permeable core. The second half-winding of the first output inductor winding and the second half-winding of the second output inductor winding are configured to produce oppositely directed magnetic fluxes through the second substantially closed magnetic flux path and the first half-winding of the first output inductor winding and the first half-winding of the second output inductor winding are configured to produce aligned, i.e. in the same direction, magnetic fluxes through the first substantially closed magnetic flux path. The integrated magnetics transformer assembly is well-suited for use in a broad range of single input or multiple-input isolated power converter topologies.

A low profile power converter structure is provide wherein volume is reduced and power density is increased to approach 1 KW / in3 by at least one of forming an inductor as a body of magnetic material embedded in a substrate formed by a plurality of printed circuit board (PCB) lamina and forming inductor windings of PCB cladding and vias which may be of any desired number of turns and may include inversely coupled windings and which provide a lateral flux path, forming the body of magnetic material from high aspect ratio flakes of magnetic material which are aligned with the inductor magnetic field in an insulating organic binder and hot-pressed and providing a four-layer architecture comprising two layers of PCB lamina including the embedded body of magnetic material, a shield layer and an additional layer of PCB lamina, including cladding for supporting and connecting a switching circuit, a capacitor and the inductor.

Power factor correction and driver circuits and stages are described. More particularly, power factor correction circuits are described that utilize an auxiliary inductor winding for power regulation. Driver circuits configured for electrical loads such as series arrangements of light emitting diodes are also described. An exemplary embodiment of a driver circuit can implement a comparator and / or a voltage regulator to allow for improved output current uniformity for high-voltage applications and loads, such as series configurations of LEDs. Embodiments of PFC stages and driver stages can be combined for use as a power supply, and may be configured on a common circuit board. Power factor correction and driver circuits can be combined with one or more lighting elements as a lighting apparatus.

The present switch mode power converter having multiple inductor windings equipped with snubber circuits uses a small value inductor that has at least one properly oriented secondary winding, and ultra fast diodes interconnect the primary and the secondary windings of this inductor for providing protection against momentary short circuits, reductions of dv / dt, and switching losses.

An integrated circuit is disclosed, including a balun, a transistor pair, and a degeneration inductor winding. The balun has an outer boundary, and comprises a primary winding and a secondary winding. The primary winding is adapted to receive an input signal. The secondary winding is magnetically coupled to the primary winding, and adapted to convert the input signal into a differential form. The transistor pair is connected to the secondary winding and adapted to amplify the input signal. The degeneration inductor winding is connected to the transistor pair and located within the outer boundary of the balun.

Method, system and apparatus for monitoring target tissue temperatures wherein temperature sensors are configured as passive resonant circuits each with a unique resonating signature at monitoring temperatures extending below a select temperature setpoint. The resonant circuits are configured with an inductor component formed of windings about a ferrite core having a Curie temperature characteristic corresponding with a desired temperature setpoint. By selecting inductor winding turns and capacitance values, unique resonant center frequencies are detectable. Temperature monitoring can be carried out with implants at lower threshold and upper limit temperature responses. Additionally, the lower threshold sensors may be combined with auto-regulated heater implants having Curie transitions at upper temperature limits.

A high-efficiency independent planar transformer comprises a pair of up-and-down symmetrical soft ferrite magnetic cores; a primary winding comprising at least one printed circuit board each having a multi-layer structure having at least two layers to form the inductor winding with at least four turns; and two secondary windings comprising at least two planar copper plates or two printed circuit boards. The primary winding and the secondary windings are electrically connected to the main circuit board via terminals. By means of the unique output structure, in the primary winding, two kinds of different output connection structures of the inductor winding can be formed by upward disposing the component side or the solder side of the printed circuit board. In the secondary winding, the inductor winding outputs in series and parallel connections can be accomplished by means of the output terminals or the short-circuit connection with the main circuit board.

An apparatus and method for wafer level fabrication of high value inductors directly on top of semiconductor integrated circuits is disclosed. The integrated circuit includes a plurality of regulator circuits, each of the regulator circuits having an input node configured to receive a plurality of pulsed input signals having a predetermined duty cycle and a plurality of inductor windings associated with each of the plurality of regulator circuits respectively. The integrated circuit also includes a core array having a plurality of core elements. The plurality of core elements are positioned adjacent to and magnetically coupled with one or more of the plurality of inductor windings. An output node is electrically coupled to the plurality of inductor windings. The output signal at the output node is the sum of the instantaneous voltage on each of the inductor windings associated with the plurality of regulator circuits respectively. The integrated circuit also includes a phase control circuit coupled to the plurality of regulator circuits. The phase control circuit controls the phase of the plurality of pulsed input signals received at the plurality of the regulator circuits to control the output signal at the output node.

A multilayer passive circuit topology is disclosed. In one embodiment, a multilayer circuit is provided. The multilayer circuit comprises a multilayer inductor comprising a first set of parallel conductive traces formed on a first layer, a second set of parallel conductive traces formed on a second layer spaced apart from the first layer; and a plurality of vias that connect respective parallel conductive traces from the first and second layer to form inductor windings. The multilayer circuit further comprises a multilayer capacitor connected to an end of the inductor by a coupling via, the capacitor comprising a first conductive plate and a second conductive plate being spaced apart from one another and being formed on different layers.

A resonant DC / DC power converter is provided with isolated primary and secondary circuits. The primary circuit includes at least four switches as first and second pairs in a bridge configuration, an isolation transformer having at least one primary and at least one secondary winding, and a resonant tank including a resonant capacitor and a split resonant inductor having two separate windings. In one embodiment, the split resonant inductor windings are substantially identical. Synchronous switching of diagonally opposed switch pairs in the bridge configuration thereby produces a center point voltage of the primary transformer winding is substantially free of stepwise voltage changes.

Power factor correction and driver circuits and stages are described. More particularly, power factor correction circuits are described that utilize an auxiliary inductor winding for power regulation. Driver circuits configured for electrical loads such as series arrangements of light emitting diodes are also described. An exemplary embodiment of a driver circuit can implement a comparator and / or a voltage regulator to allow for improved output current uniformity for high-voltage applications and loads, such as series configurations of LEDs. Embodiments of PFC stages and driver stages can be combined for use as a power supply, and may be configured on a common circuit board. Power factor correction and driver circuits can be combined with one or more lighting elements as a lighting apparatus.

An RF blocking filter isolates a two-phase AC power supply from at least 2 kV p-p of power of an HF frequency that is reactively coupled to a resistive heating element, while conducting several kW of 60 Hz AC power from the two-phase AC power supply to the resistive heating element without overheating, the two-phase AC power supply having a pair of terminals and the resistive heating element having a pair of terminals. The filter includes a pair of cylindrical non-conductive envelopes each having an interior diameter between about one and two inches and respective pluralities of fused iron powder toroids of magnetic permeability on the order of about 10 stacked coaxially within respective ones of the pair of cylindrical envelopes, the exterior diameter of the toroids being about the same as the interior diameter of each of the envelopes. A pair of wire conductors of diameter between 3 mm and 3.5 mm are helically wound around corresponding ones of the pair of envelopes to form respective inductor windings in the range of about 16 to 24 turns for each the envelope, each of the conductors having an input end and an output end. The input end of each one of the conductors is coupled to a corresponding one of the pair of terminals of the two-phase AC power supply, and the output end of each one of the conductors is coupled to a corresponding one of the pair of terminals of the resistive heating element.

A twin-spool turbine engine includes a low-pressure rotor and a high-pressure rotor, an alternator, including an inductor winding and an armature, the high-pressure rotor rotating the inductor winding of the alternator. The armature is mounted so as to rotate and the low-pressure rotor is connected to a clutch arranged so that the low-pressure rotor drives the armature in a manner that is contrarotational to the inductor winding when the clutch are engaged.

An integrated circuit is disclosed, including a balun, a transistor pair, and a degeneration inductor winding. The balun has an outer boundary, and comprises a primary winding and a secondary winding. The primary winding is adapted to receive an input signal. The secondary winding is magnetically coupled to the primary winding, and adapted to convert the input signal into a differential form. The transistor pair is connected to the secondary winding and adapted to amplify the input signal. The degeneration inductor winding is connected to the transistor pair and located within the outer boundary of the balun.

A cooled high-power vehicle inductor includes an inductor core including a central axis; a first series of inductor windings around the central axis of the cooled high-power vehicle inductor, the first series of inductor windings having an outer perimeter; a second series of inductor windings around the central axis of the cooled high-power vehicle inductor, the second series of inductor windings having an inner perimeter that is substantially outside the outer perimeter of the first series of inductor windings, wherein the second series of inductor windings is electrically coupled to the first series of inductor windings; and a first heat transfer insert that is disposed between the outer perimeter of the first series of inductor windings and the inner perimeter of the second series of inductor windings, the first heat transfer insert forming a heat transfer path.

The present invention provides an electromagnetic component formed from adjacent conducting layers of a multi-layer PCB and two additional conducting layers in contact with the PCB. The inventive component includes one or more winding turns formed by connecting the multiple layers of the multi-layer PCB with conductive vias and by connecting the additional conducting layers to respective top and bottom surfaces of the PCB. In one embodiment, one of the conducting layers is soldered to a top conducting layer of the PCB and the other of the conductive layers is soldered to a bottom conducting layer of the PCB, effectively increasing the cross-sectional area of the top and bottom winding layers. In another embodiment, the additional conducting layers are separated from the adjacent conducting PCB layers by a layer of insulation, permitting the additional conducting layers to form separate winding turns. The inventive winding stack can be surface mounted to a PCB, and can be used as an inductor, or in other electromagnetic devices. The winding thus constructed is capable of accepting larger currents with lower resulting temperature increases than windings formed only from PCBs, and are less expensive to manufacture than PCB-only windings.

The present switch mode power converter having multiple inductor windings equipped with snubber circuits uses a small value inductor that has at least one properly oriented secondary winding, and ultra fast diodes interconnect the primary and the secondary windings of this inductor for providing protection against momentary short circuits, reductions of dv / dt, and switching losses.

Method, system and apparatus for monitoring target tissue temperatures wherein temperature sensors are configured as passive resonant circuits each with a unique resonating signature at monitoring temperatures extending below a select temperature setpoint. The resonant circuits are configured with an inductor component formed of windings about a ferrite core having a Curie temperature characteristic corresponding with a desired temperature setpoint. By selecting inductor winding turns and capacitance values, unique resonant center frequencies are detectable. Temperature monitoring can be carried out with implants at lower threshold and upper limit temperature responses. Additionally, the lower threshold sensors may be combined with auto-regulated heater implants having Curie transitions at upper temperature limits.

Method, system and apparatus for monitoring target tissue temperatures wherein temperature sensors are configured as passive resonant circuits each with a unique resonating signature at monitoring temperatures extending below a select temperature setpoint. The resonant circuits are configured with an inductor component formed of windings about a ferrite core having a Curie temperature characteristic corresponding with a desired temperature setpoint. By selecting inductor winding turns and capacitance values, unique resonant center frequencies are detectable. Temperature monitoring can be carried out with implants at lower threshold and upper limit temperature responses. Additionally, the lower threshold sensors may be combined with auto-regulated heater implants having Curie transitions at upper temperature limits.

A cooled high-power vehicle inductor includes an inductor core including a central axis; a first series of inductor windings around the central axis of the cooled high-power vehicle inductor, the first series of inductor windings having an outer perimeter; a second series of inductor windings around the central axis of the cooled high-power vehicle inductor, the second series of inductor windings having an inner perimeter that is substantially outside the outer perimeter of the first series of inductor windings, wherein the second series of inductor windings is electrically coupled to the first series of inductor windings; and a first heat transfer insert that is disposed between the outer perimeter of the first series of inductor windings and the inner perimeter of the second series of inductor windings, the first heat transfer insert forming a heat transfer path.