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Patent Searching and Data


Matches 401 - 450 out of 6,699

Document Document Title
WO/1998/029788A1
In a three-phase three-wire or four-wire auto-transformer, one set or a plurality of sets of main coils connected to an input terminal are interwound around three-phase core type cores by three circuits and a plurality of sets of excitin...  
WO/1998/029929A1
This invention is related to a device and a method for protection, in an electric power plant, of an object (1) against overcurrents from a network (3) or another equipment included in the high voltage plant, the device comprising a swit...  
WO/1998/027635A1
This invention is related to a device and a method in an electric power plant for protection of an object (1) against over-currents from a network (3) or another equipment included in the high voltage plant, the device comprising a switc...  
WO/1998/027634A1
This invention is related to a device and a method in an electric power plant for protection of an object (1) against over-currents from a network (3) or another equipment included in the high voltage plant, the device comprising a switc...  
WO/1998/027636A1
This invention is related to a device and a method for protection, in an electric power plant, of an object (1) against over-currents from a network (3) or another equipment included in the high voltage plant, the device comprising a swi...  
WO/1998/022959A1
The saturation choke coil of the present invention may be used for controlling the DC voltage and/or current in power rectifiers. The present invention may also provide a substantial gain in the power coefficient as well as in the harmon...  
WO1997045288A3
In a plant intended for driving traction motors e.g. railway locomotives or motor coaches, and which possibly comprises one or more electric machines provided with insulated conductors, the magnetic circuit in the traction motor(s) and/o...  
WO1997045933A3  
WO1997045921A3
The present invention relates to a power transformer/reactor ( 14, 15, 16 ) for high voltages, comprising at least one winding having at least one current-carrying conductor. The winding comprises a solid insulation ( 7 ) surrounded by o...  
WO1997045926A3
An electric high voltage AC machine intended to be directly connected to a distribution or transmission network ( 16 ) comprises at least one winding. This winding comprises at least one current-carrying conductor, a first layer having s...  
WO1997045907A3
The present invention relates to a power transformer/reactor ( 14, 15, 16 ) for high voltages, comprising at least one winding having at least one current-carrying conductor. The winding comprises a solid insulation ( 7 ) surrounded by o...  
WO1997045919A3
The present invention relates to a rotating asynchronous converter and a generator device. The converter comprises a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC net...  
WO/1997/045919A2
A rotating electric machine for direct connection to all types of high-voltage networks, in which the magnetic circuit adapted for high voltage comprises a rotor, stator and windings. The winding comprising a conductor surrounded by a so...  
WO/1997/045288A2
In a plant intended for driving traction motors e.g. railway locomotives or motor coaches, and which possibly comprises one or more electric machines provided with insulated conductors, the magnetic circuit in the traction motor(s) and/o...  
WO/1997/045922A1
The magnetic circuit of synchronous compensator plant is included in an electric machine which is directly connected to a high supply voltage of 20-800 kV, preferably higher than 36 kV. The electric machine is provided with solid insulat...  
WO/1997/045847A1
The present invention relates to a power transformer/reactor (14, 15, 16) for high voltages, comprising at least one winding having at least one current-carrying conductor. The winding comprises a solid insulation (7) surrounded by outer...  
WO/1997/045925A1
In a plant comprising one or more electric machines constructed with insulated conductors and connected for heavy current via insulated conductors, the magnetic circuit in at least one of these electric machines is connected directly to ...  
WO/1997/045921A2
An electromagnetic device comprises a magnetic field generating electrical circuit including a winding (1) having at least one electrical conductor (2). The winding comprises a solid insulation (4) surrounded by outer and inner layers (3...  
WO/1997/045923A1
The magnetic circuit of a generator in a hydro-generator plant is arranged to directly supply a high supply voltage of 20-800 kV, preferably higher than 36 kV. The generator is provided with solid insulation and its winding includes a ca...  
WO/1997/045933A2
In a method for reducing the influence of third harmonic voltages upon direct connection of alternating current machines (1) to a three-phase power network (5), wherein at least one winding of the machine is Y-connected and the neutral p...  
WO/1997/045848A1
The present invention relates to a DC transformer/reactor comprising a magnetic circuit, wherein the magnetic circuit comprises a magnetic core and at least one winding. The winding comprises at least one current-carrying conductor. Each...  
WO/1997/045926A2
An electric high voltage AC machine intended to be directly connected to a distribution or transmission network (16) comprises at least one winding. This winding comprises at least one current-carrying conductor, a first layer having sem...  
WO/1997/045924A1
In a plant containing a turbo-generator the magnetic circuit of the turbo-generator is included in an electric generator which directly supplies a high supply voltage of 20-800 kV, preferably higher than 36 kV. The insulation of the gene...  
WO/1997/045927A1
The present invention relates to a rotating electric high voltage machine comprising a stator (8), a rotor (7; 37; 47) and at least one winding. The machine is characterized in that said winding comprises at least one current-carrying co...  
WO/1997/045907A2
The present invention relates to installations for transformerless generation of HVDC and wherein the installation comprises rotating high-voltage single-winding/multiple-winding machines and converters. The single-winding/multiple-windi...  
WO/1997/045912A1
The present invention relates to a rotating asynchronous converter and a generator device. The converter comprises a first stator connected to a first AC network with a first frequency (f1), and a second stator connected to a second AC n...  
WO/1997/044796A1
A controllable inductor comprises at least a tubular core (3), a main winding (1) surrounding the core and a control winding (4) passing substantially axially through the core. It also comprises a yoke (19) of a material having a high ma...  
WO/1997/044795A1
A controllable inductor comprises at least a tubular core, a main winding (1) surrounding the core and a control winding (3) passing substantially axially through the core. It is adapted for connection to a three phase alternating curren...  
WO/1997/035327A1
A high voltage electrical apparatus (13) comprises an insulating support (14) made of a moulded first electrically insulating material and carrying rigid electrical conductors (11, 12) and a second electrically insulating material (16, 1...  
WO/1997/034161A1
A method for monitoring an on-load tap changer wherein the recording of sound and its conversion into a sound signal are initiated at the beginning of a connection operation of the tap changer and the sound signal is rectified, converted...  
WO/1997/029494A1
A parallel winding voltage-regulating apparatus includes a transformer whose voltage-regulating side consists of two parallel main windings, which are electric coupling through balancing reactor. The two main windings are tapped in the o...  
WO/1997/028545A1
The invention features a non-linear inductor (10) which passively varies its impedance from a very low value to a relatively high value over a very small change in current (I) to effectively accomplish current limitation with a very smal...  
WO/1997/020328A1
A controlled by-pass reactor is proposed in which the control coil is divided into several sections of 10 % power increments or into several identical sections. Various configurations of the primary coil and control coil sections are pro...  
WO/1997/001883A1
A resonance tapped transformer circuit as described in which the effective turns ratio of the transformer is dependent on the frequency of the input signal. The transformer selectively connects one or more primary coils of the transforme...  
WO/1996/024146A1
A device for uninterrupted voltage control with an autotransformer has a first contact member (11), with which the load section (4) of the transformer can be bridged, and a second contact member (9), with which the primary winding (2) of...  
WO/1996/018198A1
A D.C. reactor comprising a core structure having two opposed cores separated by a magnetic gap, to form a closed magnetic circuit; a coil wound on one or both of the cores; a pair of permanent magnets for biasing, disposed on the core s...  
WO/1996/003018A1
The present invention relates to an electrical power control circuit for loads such as fluorescent lighting systems. A winding (3) has a positive end (13) connected to a positive rail (1) and is tapped at a predetermined position (18) fo...  
WO/1995/033270A1
An electric adjuster which can arbitrarily or continuously adjust the turns ratio of a transformer so as to adjust or convert inputted AC power or AC signals arbitrarily and efficiently and output the adjusted or converted the AC power o...  
WO/1995/024724A1
The invention concerns a switching arrangement for load change-over switches of step switches and for selector switches, wherein two switching contacts movable in two directions are present. The first switching contact is in the form of ...  
WO/1995/024005A1
An apparatus for providing an electrically controllable inductor uses a first and a second magnetic core (20, 24) spaced apart from one another. A DC bias coil (22) is wound on the first magnetic core (20). An inductor coil (26) is wound...  
WO/1995/017757A1
Transformers with similar secondary windings are required in particular for airport navigation lights, in which groups of navigation lights are to be operated with a constant current intensity by the secondary windings. In the state of t...  
WO/1995/003617A1
A planar transducer consists of one or several rectangular ferrite cores with a rectangular passage through which a metallic section with a rectangular cross-section is guided, in particular to ensure the secondary regulation of a mains ...  
WO/1994/011891A1
The invention relates to an inductor with variable inductance based on the principle of orthogonal magnetization, that is, control of the permeability of the magnetic material with the aid of a cross-directional control field. The induct...  
WO/1994/001814A1
An inductive device comprised of a transformer including a core (10) of amorphous metal enhanced by a permanent magnet (13). A primary winding, including coils (11a-11d), pilots fluxes about the core (10), thereby enabling increased elec...  
WO/1994/001878A1
The invention relates to a tap selector for an on-load tap changer, wherein the two tap selector shafts (3, 4) are made of metallic material and placed inside the current collector rings (22). The movable contacts (6, 7) of the selector ...  
WO/1993/024943A1
It is the aim of the invention to produce an arrangement for easy ignition voltage generation ensuring great reliability. The pulse generator (22) is fitted with two ignition coils (2a, 2b) and a permanently-magnetised rotor (4). The rot...  
WO/1993/023861A1
A step switch for a step transformer (1), preferably for a cast-resin encapsulated step transformer, has one-phase identical step switch modules (3.1, 3.2, 3.3) having each all means required for switching the load and its own housing fo...  
WO/1990/014675A1
The oil reservoir (2) of a load-reversing switch suspended in the flange opening of a transformer tank (20) extends outside the transformer tank (20). A perforated separating plate (6) arranged below and parallel to the level of the oil ...  
WO/1990/006584A1
A high-voltage winding for core-form power transformers is disclosed that uses two different conductor configurations within a single coil to minimize eddy current losses. The winding (5) includes a first elongated conductor bundle (7) f...  
WO/1989/008948A1
A magnetic amplifier including a magnetic core (11) having a primary leg (15), a secondary leg (17), and a control leg (13). A primary winding (21) is wound about the primary leg (15) of the magnetic core for generating a non-saturating ...  

Matches 401 - 450 out of 6,699