| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 336137000 | WITH MEANS TO CHANGE COIL LENGTH OR CONNECTIONS | 36 |
| 20090189725 | ON-CHIP INTEGRATED VOLTAGE-CONTROLLED VARIABLE INDUCTOR, METHODS OF MAKING AND TUNING SUCH VARIABLE INDUCTORS, AND DESIGN STRUCTURES INTEGRATING SUCH VARIABLE INDUCTORS - On-chip integrated variable inductors, methods of making and tuning an on-chip integrated variable inductor, and design structures embodying a circuit containing the on-chip integrated variable inductor. The inductor generally includes a signal line configured to carry an electrical signal, a ground line positioned in proximity to the signal line, and at least one control unit electrically coupled with the ground line. The at least one control unit is configured to open and close switch a current path connecting the ground line with a ground potential so as to change an inductance of the signal line. | 07-30-2009 |
| 20100148905 | INDUCTOR MODULE AND CIRCUIT MODULE - Disclosed herein is an inductor module including a coil section provided with an input terminal and an output terminal. At least one of the input terminal and the output terminal is composed of a plurality of terminals. The input terminal and the output terminal are connected at different positions. The connection of the plurality of terminals constituting the input terminal or the output terminal is switched so as to change the combination of the input terminal and the output terminal, obtaining different inductance values. | 06-17-2010 |
| 20100164667 | ON-CHIP TRANSFORMER BALUN STRUCTURES - An electronic device includes a first winding having a first port and a second port. The first winding formed in a first metal layer. A second winding has a third port and a fourth port. The second winding includes a plurality of segments formed in the first metal layer. The second plurality of winding segments are connected by a bridge formed in a second metal layer. The first and second ports of the first winding are connected to the inner-portion of the first winding. | 07-01-2010 |
| 20150145628 | PRINTED CIRCUIT BOARD - A printed circuit board, and more particularly, a printed circuit board that provides a variable inductance. A printed circuit board includes: an inductor positioned between an input terminal and an output terminal; a switch connected to the inductor; and a controller connected to the output terminal and the switch and outputting a control signal for controlling the switch to the switch, wherein the inductor is formed of a plurality of circuit patterns having different plating thicknesses and signal paths for the plurality of circuit patterns are selectively connected by operation of the switch according to the control signal. | 05-28-2015 |
| 336138000 | Parallel-spaced conductors or coils bridged by movable connector | 1 |
| 20130285783 | TUNABLE COIL ANTENNA - A tunable coil antenna ( | 10-31-2013 |
| 336142000 | Coil connections changed by moving coil (e.g., coil substitution) | 1 |
| 20120223796 | VARIABLE INDUCTOR - A variable inductor includes an inductor element and a first inductance adjusting circuit. The first inductance adjusting circuit includes a first open-loop structure and a first switch element. The first switch element is coupled to the first open-loop structure. When the first switch element is in a conducting state, the first open-loop structure and the first switch element forms a first closed-loop to induce a first magnetic flux which alters a magnetic flux from the inductor element in operation. | 09-06-2012 |
| 336143000 | With connection reversing means | 1 |
| 20140085027 | Varying Inductance - The present application relates to circuitry having a plurality of inductors, each inductor having a first end and a second end; and a switching arrangement connected to the first end and to the second end of each of the plurality of inductors for routing a current via the inductors; wherein the switching arrangement is arranged to at least one of selectably prevent current from flowing through a subset of the plurality of inductors and select a current flow direction through one of the inductors relative to a current flow direction through at least one other of the inductors so as to vary an effective inductance that the plurality of inductors represents to the current. | 03-27-2014 |
| 336145000 | Plural coils (e.g., transformers) | 8 |
| 20120249277 | TAP CHANGER WITH A POLARITY SWITCH FOR A VARIABLE TRANSFORMER - The invention relates to a step switch provided with a pre-selector and a polarity circuit, a separate polarisation resistance being respectively provided at the beginning and the end of the stepped winding. Optionally, the two polarisation resistances can be connected continuously or via separate polarity switches. | 10-04-2012 |
| 20130082810 | SWITCHABLE TRANSFORMER WITH EMBEDDED SWITCHES INSIDE THE WINDINGS - A switchable transformer architecture is disclosed. The switchable transformer includes a primary winding, a secondary winding, and a tertiary winding, in which either the secondary winding or the tertiary winding establish a signal path to the primary winding, based on the position of switches, enabling transmission to either of two blocks sharing the transformer. The transformer architecture achieves high isolation between sharing blocks and low loss on the signal path. | 04-04-2013 |
| 20150022303 | CONTROL TRANSFORMER - The invention relates to a control transformer that is designed as a phase-shifting transformer, wherein semiconductor switching components are provided for each phase at a regulating winding with several partial windings. According to the invention, an additional connecting line with an additional electronic switching component is provided in each phase wherein each of these connecting lines connects a module of the respective phase with the end of the main winding of the adjacent phase. | 01-22-2015 |
| 20150109085 | TRANSFORMER - A transformer and a method of manufacturing a transformer are disclosed. The transformer can include a transformer core with at least three core limbs which are arranged in parallel with respect to one another and perpendicular to corner points of an area spanned by a polygon, and wherein axial end regions of each of the at least three core limbs transition into a respective yoke segment arranged transversely with respect to the axial end regions. Main windings can be arranged around each of the at least three core limbs in a hollow-cylindrical winding region. A magnetic cross section of a respective core limb can be greater than a magnetic cross section of the respective yoke segment. Additional windings can be electrically connected to a respective main winding and can be arranged around each of the respective yoke segments. | 04-23-2015 |
| 336146000 | Inductance change in plural coils | 2 |
| 20130207765 | INTEGRATED TRANSFORMERS - Systems, methods and devices directed to transformers are disclosed. One transformer system includes a set of transformer cells and a controller. The set of transformer cells is coupled in series to form a series coupling, where each transformer cell includes at least one first coil and at least one second coil. The second coil is configured to receive electrical energy from the first coil through magnetic interaction. The controller is configured to modify electrical aspects at ends of the series coupling by independently driving the transformer cells such that at least one of the transformer cells is driven differently from at least one other transformer cell in the set. | 08-15-2013 |
| 20140285300 | Induction Component - The invention proposes an induction component produced using thin film technology which can be used for a variety of functions. It contains, on a magnet core with a ring shape, two coil devices which, for their Part, are in turn constructed from at least two coils. The adjacent end windings of adjacent coils are connected to one another and to a common solder pad within each coil device. This makes it possible to connect individual coils and thus to utilize different functions of the induction component. | 09-25-2014 |
| 336147000 | Plural coils or coil portions connected in parallel or in series and parallel | 1 |
| 20100039200 | MAGNETIC COMPONENTS AND METHODS OF MANUFACTURING THE SAME - Magnetic component assemblies including coil coupling arrangements, that are advantageously utilized in providing surface mount magnetic components such as inductors and transformers. | 02-18-2010 |
| 336148000 | Autotransformers | 1 |
| 20120154090 | VOLTAGE TRANSFORMING APPARATUS - A voltage transforming apparatus includes a primary winding receiving an AC voltage, a plurality of secondary windings that are different in number of turns, and a voltage conversion circuit for converting an AC voltage induced in each of the plurality of secondary windings. Each of the plurality of secondary windings includes the first terminal and the second terminal each having a potential that is not fixed. The first terminal and the second terminal are separately provided in each of the secondary windings. The voltage transforming apparatus further includes a switching circuit for selectively connecting the first terminal and the second terminal of each of the plurality of secondary windings to the voltage conversion circuit. | 06-21-2012 |
| 336149000 | Contactor slidable on coil winding | 1 |
| 20140354389 | Compact step-programmable optimization of low-noise amplifier signal-to-noise - A new family of programmable low-noise RF impedance transformers has been developed. These new transformers can be configured and operated to compensate for variable antenna output impedance. This enables better optimization of RF receiving-system SNR. For some applications, these new devices can be more compact and less expensive than any previously available. | 12-04-2014 |
| 336150000 | Series change (e.g., tap change) | 20 |
| 20100328005 | DRY TYPE TRANSFORMER WITH IMPROVED COOLING - A distribution transformer having a coil assembly mounted to a ferromagnetic core. The coil assembly includes a resin-encapsulated low voltage coil mounted to the core, a resin-encapsulated first high voltage coil disposed around the low voltage coil, and a resin encapsulated second high voltage coil disposed around the first high voltage coil. The first high voltage coil is separated from the low voltage coil by an annular first space, and the second high voltage coil is separated from the first high voltage coil by an annular second space. The low voltage coil and the first and second high voltage coils are arranged concentrically. The low voltage coil and the first and second high voltage coils have different axial lengths. | 12-30-2010 |
| 20110074533 | Center Tapped Transformers for Isolated Power Converters - A cost effective solution for construction of high frequency, double ended, isolated, push pull, center tapped power transformers operating in continuous/discontinuous mode with minimized winding proximity losses comprises at least two identical sets of windings with identical coupling coefficients. Each set of windings consists of at least one primary winding and at least one secondary winding tightly coupled to each other. Both the sets of windings are loosely coupled to each other with a magnetic field isolating separator. | 03-31-2011 |
| 20110102118 | MANUAL DRIVE FOR A TAP CHANGER FOR TAP-CHANGING TRANSFORMERS - The invention relates to a manual drive for a tap changer for a tap-changing transformer having a locking unit. The locking unit has a catch which can pivot and has different locking means; the catch can be operated from the outside before an intended switching operation. The locking unit offers high a degree as possible of safety against inadvertent or else deliberate incorrect operations of the manual drive. | 05-05-2011 |
| 20120249278 | SYSTEM AND METHOD FOR OPERATING A TAP CHANGER - A method of operating a tap changer of a transformer or a voltage regulator in a power grid includes obtaining a load forecast for a time period. An average voltage profile is determined for the time period based on the load forecast. The method further includes estimating tap positions of the tap changer for leveling the average voltage profile during the time period. Switching signal commands are provided to the tap changer based on the estimated tap positions. | 10-04-2012 |
| 20120268228 | Tuning Circuit - A variable inductor structure for varying an inductance responsive to a digital tuning signal, comprising: a first inductor; a second, adjustable, inductor; and a digital control mechanism configured to receive the digital tuning signal and to adjust the effective inductance of the second inductor in response to the digital tuning signal; wherein the second inductor is positioned sufficiently close to the first inductor so as to be capable of altering by mutual inductance the effective inductance of the first inductor in dependence on the digital tuning signal. | 10-25-2012 |
| 20140055225 | LOAD TAP CHANGER - A load tap changer includes a mechanical switch, a semiconductor switch and an impedance branch or an uncontrolled semiconductor switch. The mechanical switch is connected to a power terminal of a voltage conversion device to carry an electric current and is activated to switch from a first tap to a second tap of the voltage conversion device when a tap change signal is received. The semiconductor switch is then connected between the first tap and the power terminal of the voltage conversion device when the tap change signal is received and is disconnected before the mechanical switch is connected to the second tap. The impedance branch or the uncontrolled semiconductor switch is connected between the second tap and the power terminal of the voltage conversion device before the mechanical switch is connected to the second tap. The impedance or the uncontrolled semiconductor switch is disconnected after the mechanical switch is connected to the second tap. | 02-27-2014 |
| 20140085028 | TAP CHANGER AND VACUUM INTERRUPTER FOR SUCH A TAP CHANGER - The invention relates to a tap changer for the interruption-free switchover between winding taps of a tap-changing transformer. Furthermore, the present invention relates to a novel vacuum interrupter which is particularly suitable for such a tap changer. The tap changer according to the invention is based on the general concept of combining in each case one main contact (V1) and one mechanical switching means (U1), connected in series therewith, of a first load branch and an additional resistive contact (V | 03-27-2014 |
| 20140159847 | ON-LOAD TAP CHANGER - The invention relates to an on-load tap changer consisting of an energy store, a drive shaft designed as a screw spindle, vacuum switching tubes and a contact carrier and vertically arranged tap contacts. Actuation of the vacuum switching tubes occurs in dependence on the contacts. According to the invention, the vacuum switching tubes are actuated via cam discs and deflection assemblies. In parallel, the contacts attached to the contact carrier are moved vertically by the drive shaft and the tap contacts are thus actuated. | 06-12-2014 |
| 20140176273 | TAP CHANGER HAVING A VACUUM INTERRUPTER ASSEMBLY WITH AN IMPROVED DAMPER - An on-load tap changer is provided having a vacuum interrupter that is actuated by a shaft of an actuation assembly. A damper dampens the movement of the shaft. The damper provides more dampening when the shaft is closing the vacuum interrupter than when the shaft is opening the vacuum interrupter. The damper includes a housing at least partially defining an interior chamber into which the shaft extends. A piston with openings extending therethrough is disposed in the interior chamber and is secured to the shaft so as to be movable therewith. A blocking structure is operable to block the openings in the piston when the shaft is closing the vacuum interrupter and to un-block the openings in the piston when the shaft is opening the vacuum interrupter. | 06-26-2014 |
| 20140218151 | Dry-Type Transformer - A dry-type transformer comprises a winding with a tapping zone, the tapping zone being the zone wherein at least two connections can be made, allowing to change the number of turns of the winding and thus change the turn ratio of the transformer, and with at least a first non-tapping zone, wherein the winding comprises a conductor having, in at least part of the tapping zone, a first width in the axial direction of the winding, and having, in at least part of the first non-tapping zone, a second width in the axial direction of the winding, the first width being smaller than the second width. | 08-07-2014 |
| 20140354390 | TAP CHANGER - The invention relates to a tap changer for voltage regulation, comprising semiconductor switch units (S | 12-04-2014 |
| 20140375407 | TRANSFORMER WITH ON-LOAD TAP CHANGER - The invention relates to a transformer with a tap changer, wherein optionally the primary or secondary side can be regulated by the tap changer, and wherein, on the side of the transformer to be regulated, a main winding and at least one regulating winding, which is connectable by the tap changer, are provided. According to the invention, the main winding is divided into two main winding parts, and the at least one regulating winding and the tap changer ( | 12-25-2014 |
| 20150028978 | DISTRIBUTION TRANSFORMER FOR VOLTAGE REGULATION OF LOCAL DISTRIBUTION NETWORKS - The invention relates to a distribution transformer having a tap-changing device for no-break switching between different winding taps of a distribution transformer. The general inventive concept consists in actuating both the selector contact unit and the switching means for no-break load switching by means of a common motor drive without interposition of an energy store. | 01-29-2015 |
| 20150061806 | TAP CHANGER WITH AN IMPROVED DRIVE SYSTEM - An on-load tap changer is provided having a plurality of modules, each of which is operable to change taps in a winding of a transformer. A transmission shaft is connected to the modules and is operable upon rotation to effectuate tap changes in the windings. A servo motor rotates the transmission shaft. The servo motor includes a feedback device operable to generate a feedback signal containing information relating to the position of the motor shaft. A servo drive is connected to the servo motor to receive the feedback signal. The servo drive uses the feedback signal to determine and store a total angular displacement of the motor shaft. The servo drive uses the feedback signal and the total angular displacement of the motor shaft to control the operation of the servo motor. | 03-05-2015 |
| 20150091683 | SLOW WAVE INDUCTIVE STRUCTURE AND METHOD OF FORMING THE SAME - A slow wave inductive structure includes a first substrate, a first conductive winding over the first substrate, and a second substrate over the first substrate. The second substrate has a thickness ranging from about 50 nanometers (nm) to about 150 nm. A distance between the first conductive winding and the second substrate ranges from about 1 micron (μm) to about 2 μm. A slow wave inductor includes a first substrate and a first conductive winding over the first substrate. The slow wave inductor further includes a second substrate over the first substrate and a plurality of switches in the second conductive substrate. The first conductive winding is connected to each switch of the plurality of switches. | 04-02-2015 |
| 20150091684 | ON-LOAD TAP CHANGER - The present invention relates to an on-load tap changer for uninterrupted switching between different winding taps of a tapped transformer according to the first claim. The general inventive concept is that of arranging the on-load tap changer on the underside of the transformer cover by means of a gear module. | 04-02-2015 |
| 20150348702 | PARAMETER-VARIABLE DEVICE, VARIABLE INDUCTOR AND DEVICE HAVING THE VARIABLE INDUCTOR - A device having a variable inductor includes an inductor having an inductance, a first conductor having a first grounding property, and a second conductor having a second grounding property. The device further includes a first single-mesh structure including a first grid. The first grid includes a first conducting wire electrically connected to the first conductor, and a second conducting wire electrically connected to the first conducting wire and the first conductor, wherein the first conducting wire, the second conducting wire and the first conductor are configured to form a first loop corresponding to the inductor for tuning the inductance. The first single-mesh structure further includes a second grid. The second grid includes a third conducting wire electrically connected to the first conducting wire and the second conductor, and a fourth conducting wire electrically connected to the third conducting wire and the second conductor, wherein the third conducting wire, the fourth conducting wire and the second conductor are configured to form a second loop corresponding to the inductor for tuning the inductance. | 12-03-2015 |
| 20160035506 | METHOD FOR AVERAGING THE VOLTAGE IN AN ON-LOAD TAP CHANGER - The invention relates to a method for averaging the voltage in an on-load tap changer used to switch between various winding taps of a tapped transformer. The general inventive concept consists in reaching a predefined operating position of the on-load tap changer by having a parameterized control device activate a motor drive in a first rotational direction once the on-load tap changer has been turned on, such that the on-load tap changer starts running through its stationary operating positions, i.e. the various winding taps of the tapped transformer, in the direction of the first tap; the control device recognizes when the on-load tap changer has reached its final position, whereupon the motor drive is activated in a second rotational direction such that the on-load tap changer then runs through the control range in the opposite switching direction until reaching the first stationary operating position; the first stationary operating position is subsequently configured as a predefined operating position using the control device parameterization stored in a non-volatile manner. | 02-04-2016 |
| 20160189858 | Transformer Arrangement For Mitigating Transient Voltage Oscillations - A transformer arrangement and transformer for mitigating transient voltage oscillations. The transformer included a transformer core enclosing at least one core leg. A winding is wound around one of the at least one core leg. The winding extends from a first winding terminal to a second winding terminal and includes a first winding section along a first conductor extending from the first winding terminal to a first intermediate end point, and a second winding section along a second conductor extending from a second intermediate end point to the second winding terminal. The transformer arrangement further includes an external passive electric component connected between the first intermediate end point and either the second intermediate end point or the second winding terminal arranged to decrease an effective difference between capacitive and inductive voltage distributions between the intermediate end points such that transient voltage oscillations in the winding are mitigated. | 06-30-2016 |
| 20170236658 | PRESELECTOR SWITCH ASSEMBLY FOR A VARIABLE TRANSFORMER | 08-17-2017 |
