Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 201 - 250 out of 6,612

Document Document Title
WO/2011/076309A1
The invention relates to a step switch provided with a preselector and a polarity circuit, a separate polarisation resistance being respectively provided at the beginning and the end of the stepped winding. Optionally, the two polarisati...  
WO/2011/072460A1
An alternating-current stepped controllable paralleling single/three-phase reactor comprises a main reactor (1), a stepped reactor (2), a detection unit (3) and a central controller (4). The main reactor (1) is a single-phase or three-ph...  
WO/2011/073771A1
A polyphase transformer (1 ) comprising at least a first leg (2, 51 ) and a second leg (3, 52) of a magnetic material is described. The transformer comprises a single core with legs (2-4, 51-53) and yokes (27, 28, 54, 55). A primary wind...  
WO/2011/068044A1
A voltage transformer comprises: a primary winding (3) that receives an AC voltage; a plurality of secondary windings (4a, 4b) that have mutually different numbers of turns; and a voltage converter circuit (5) for converting AC voltages ...  
WO/2011/060779A1
The invention relates to a continuously adjustable transformer (200), comprising a transformer core (100), a primary winding (7), a one-layer contactable adjustment winding (30), an adjustment contact (22) that can be moved along the adj...  
WO/2011/042070A1
The invention relates to a tap changer which has two load arms which each have vacuum interrupters. According to the invention, an additional mechanical switching element is provided between the load arms and the common load discharge li...  
WO/2011/035394A1
A three phase fault current limiter (FCL 6) has three spaced apart input terminals (7) for electrically connecting to respective terminals (5) of a transformer (2). Three output terminals (8) electrically connect FCL (6) with a load circ...  
WO/2011/029251A1
A non-excitation cage-shaped voltage-regulation tap changer for a transformer. Each phase of the tap changer has two cage bodies. One of the cage bodies has annular fixed contacts (7-1) linked with main winding taps (K) and annular fixed...  
WO/2011/022906A1
A cage-style tap-changer without excitation for transformer includes up and down brackets (2, 3) and insulating poles (4) connected between them along peripheral direction. There are interval annular fixed contacts (7) on the axes of the...  
WO/2011/024180A1
A current limiting device (30, 40, 50, 60) comprising for each phase of an AC supply a closed magnetic core (31) of reduced volume and mass having first and second pairs of opposing limbs (32a, 32b; 33a, 33b), and at least one AC coil (3...  
WO/2011/024179A2
A three-phase current limiter (30) for an alternating current system includes an AC magnetic circuit having at least one AC coil (35Rl, 35Sl, 35Tl) for each phase of a 3- phase AC supply wound on a saturable ferromagnetic core and config...  
WO/2011/002829A1
An ignition apparatus includes a core, primary and secondary windings and a loop-shaped magnetic return path structure. The structure includes layers of wound strip steel or wound ferritic wire stacked in an outward fashion. The core is ...  
WO/2010/127759A1
The present invention relates to a method for quantitatively analyzing gases as a monitor for on-load tap changers. The general inventive concept lies in selecting particular characteristic gases allowing an indirect subsequent associati...  
WO/2010/122422A1
The present invention relates to providing electrical contact in a tap changer of a transformer. A tap changer with contacts is provided, which contacts contributes to a compensation of tolerances and wear. The tap changer comprises a cy...  
WO/2010/115485A1
The invention relates to an on-load tap changer comprising semiconductor switching elements for uninterrupted switching between fixed tap changer contacts which are electrically connected to winding taps of a tapped transformer. Each of ...  
WO/2010/094993A1
The invention relates to converter equipment for electric power generation by means of converting constant magnetic field into alternating current without mechanical moving parts. The technical result is the increase of efficiency- outpu...  
WO/2010/072623A1
The invention relates to a tapping switch for medium-/low-voltage transformers that is based on one or more mechanical switches. During switchover, the current is conducted over semiconductor switches in order to ensure freedom from inte...  
WO/2010/067649A1
A variable inductor (10) is provided with: a first coil (1); a second coil (2) which generates a magnetic flux in the direction which cancels a magnetic flux generated by the first coil (1); a movable core (5) which is positioned between...  
WO/2010/056122A1
A current limiter, wherein the limiter is designed to limit three-phase alternating current, having a nominal current intensity of 100 A or more, wherein the limiter is at least provided with: -a first, second and third current conductor...  
WO/2010/043546A1
High frequency resonance based ignition system comprising a generator, a resonance structure, and a heat release interface, the resonance structure having a high frequency coil, characterized in that it further comprises a tuning element...  
WO/2010/033759A1
A voltage regulator is provided that includes a plurality of buck-boost transformers each having primary and secondary windings. The secondary windings of the transformers are electrically disposed in series between a source and a load. ...  
WO/2010/022750A1
The invention relates to a tap switch for uninterrupted changeover between two winding taps (tap n, tap n+1) of a tapped transformer, wherein each of the two winding taps is connected to the common outgoing load line via in each case a m...  
WO/2010/022751A1
The invention relates to a method for switching without any interruption between two winding taps (tap n, tap n+1) of a tap-changing transformer, wherein each of the two winding taps is connected to the common load output line via in eac...  
WO/2009/152662A1
A self power-acquiring quickly responsive controllable electric reactor is provided. The coil of the main body portion (1) of the controllable electric reactor contains a net-side winding (5) and a control winding (6). The coil of the ma...  
WO/2009/146579A1
A magnetic filter includes three iron stud cores (2), an upper yoke (11), a lower yoke (12) and three coil assemblies (3) separately around three iron stud cores, the iron stud cores are placed symmetrically to each other in 120-degree b...  
WO/2009/137908A1
A tap-switching autotransformer for regulating the voltage supplied to a facility includes an electronics sub-assembly for controlling switching of the taps. The electronics sub-assembly and the windings are contained in a housing from w...  
WO/2009/136879A1
The invention pertains to the execution of the turns of a coil of a transformer or the like. The invention presents a solution for linearly varying, with a small resolution interval, the number of turns of a coil. The invention applies f...  
WO/2009/094541A3
An electromagnetic actuator with flux feedback control includes two poles located on opposite sides of a soft-magnetic target. A bias flux is introduced that flows into both poles. Magnetic circuitry may be designed so that the total bia...  
WO/2009/121143A1
A fault current limiter (FCL) includes a series of high permeability posts (1) for collectively define a core for the FCL. A DC coil (2), for the purposes of saturating a portion of the high permeability posts (1), surrounds the complete...  
WO/2009/107130A1
A method for providing an operating voltage to an air conditioner, including: measuring an input line voltage; comparing the measured input line voltage to an desired operating voltage of the air conditioner; and transforming the input l...  
WO/2009/105932A1
An external-hanging type combined on-load tap-changer comprises a housing(200), a tap-chooser(600), a change-over switch assembly(700), a transmission means and an electric operating mechanism. Terminals(220) are provided at a sidewall o...  
WO/2009/105931A1
A movable contact of a tap changer comprises a mounting plate assembly (200) of the movable contact revolving with a main shaft of the changer and a clip-on movable contact (300) provided on the mounting plate assembly (200) of the movab...  
WO/2009/096816A1
The inventive device comprises a closed magnetic circuit, a central rod disposed inside the closed magnetic circuit, a control winding arranged on the central rod, a power winding and a control unit. The device also comprises a cylindric...  
WO/2009/094541A2
An electromagnetic actuator with flux feedback control includes two poles located on opposite sides of a soft-magnetic target. A bias flux is introduced that flows into both poles. Magnetic circuitry may be designed so that the total bia...  
WO/2009/089261A1
The electrically tunable inductive device (10) includes an electromagnet (12) including an electromagnet core (14) and a bias or tuning coil (16) cooperating therewith to define opposing magnetic poles for generating a quiescent magnetic...  
WO/2009/073875A1
A load tap changer includes a single mechanical switch that is movable to create, in a first position, a first conducting path between a first transformer tap and a load. When the switch is in a second position, the switch creates a seco...  
WO/2009/065219A1
An electrical generator comprises an induction coil having a first end and a second end. There is a first magnet disposed adjacent the first end of the induction coil so as to be in the electromagnetic of the induction coil when the indu...  
WO/2009/056018A1
An apparatus (10, 110, 510, 610) for controlling the starting and stopping of an AC induction motor comprises: a first magnetic permeable portion (20, 40, 120, 140, 520, 540, 620, 640) having first, second and third legs (21, 22, 23, 41,...  
WO/2009/008765A1
The invention relates to electrical engineering, in particular to transformer production, and can be used in current-limiting devices which, during short-circuits in electric networks, make it possible to use the network breakers when th...  
WO/2008/138623A1
The invention relates to a method for influencing the magnetic coupling between two bodies (10, 12) at a distance from each other, characterized in that a controllable field displacement device (13) having a field displacement area is pl...  
WO/2008/100126A1
The invention relates to a transformer for current of controlled residual flux, formed by: a toroidal magnetic core with a central opening; a primary conductor which extends through the central opening and which is supplied with a main c...  
WO/2008/100127A1
The invention relates to a transformer for controlled electric voltage, including: a magnetic core; at least one primary winding which is supplied with a main current in order to generate a main magnetic flux on the magnetic core; at lea...  
WO/2008/073034A1
An inductor regulator (50) for controlling the active and/ or reactive power flow in a three-phase electric transmission network (30,40), which for each phase comprises a first stator winding (60a, 60b, 60c) and a second stator winding 6...  
WO2007073316A9
A device for controlling a magnetic flux in an electro- magnetic system, wherein the system comprises magnetically connected magnetic cores, between which a volume is arranged. The volume comprises a controllable magnetic flux region and...  
WO/2008/031302A1
A non-excited drum tap-changer for a transformer includes an upper pedestal (2) and a lower pedestal (3). Insulated shafts (4) are positioned around the upper pedestal (2) and the lower pedestal (3), characterized in that fixed contacts ...  
WO/2008/009349A3
A coil, in particular for electromagnetically controlled brakes or clutches, has two or more part-windings and associated taps. A first part-winding comprises a winding wire having a first diameter, and a second part-winding comprises a ...  
WO/2008/024048A1
The present invention relates to a motor drive cabinet (2) in an on-load tap-changer, comprising an electric motor drive unit and a control unit (12). The electric motor drive unit comprises an electric motor (6), a gearbox (7) and a pos...  
WO/2008/024067A1
A resistor (10) for electric high-voltage apparatus, especially for connection to a diverter switch (11) in an on-load tap changer for a high-voltage transformer. The diverter switch (11) and the resistor (10) are arranged in a housing w...  
WO/2008/020750A1
A controlled electric voltage transformer which is formed by at least one magnetic core; at least one primary winding; at least one secondary winding, such that the primary winding or the secondary winding or both windings have a series ...  
WO/2008/009349A2
A coil, in particular for electromagnetically controlled brakes or clutches, has two or more part-windings and associated taps. A first part-winding comprises a winding wire having a first diameter, and a second part-winding comprises a ...  

Matches 201 - 250 out of 6,612