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Matches 301 - 350 out of 6,691

Document Document Title
WO/2006/056040A1
The invention includes an electric alternator/motor (10) having a rotor (12), stator (20) and at least one winding (22) in the stator (20) adapted to conduct a current, the machine also having first and second magnetic circuits, one of w...  
WO/2006/055598A1
Various techniques directed to the design and construction of transformers are disclosed. In one aspect, a method according to embodiments of the present invention includes loading parameters of a transformer included in a power supply d...  
WO/2006/042778A1
The invention relates to a reactance coil, in particular for operation in a frequency converter system (1) together with an electric machine (5) and a frequency converter (2) for operating said electrical machine. The reactance coil (3) ...  
WO/2006/021597A1
The invention relates to a multi-voltage power transformer for a high-voltage electric power transmission network (Politrafo), which is of compact design and which has different selectable input and/or output voltage levels, such as to p...  
WO/2006/004527A1
The invention relates to a diverter switch with an operating member and an electric circuit. The electric circuit has a main branch (1) and a resistance branch (2) connected in parallel with the main branch (1). Each branch comprises a c...  
WO/2006/003111A1
In a variety of high power electrical devices, such as fault current limiters, a permanent magnet can be used as part of a magnetic circuit, and its inductance can be altered by passing electrical current through a coil wound around it t...  
WO/2006/001170A1
A variable inductor having a small size and low height and capable of achieving sufficient dielectric strength between maim winding wires and a control winding wire. A variable inductor (10) has a control winding wire (11), main winding ...  
WO/2005/119711A1
The invention comprises a controllable inductive device, with a first core (2), a main winding (3) and a control winding (4), where the main winding (3) and the control winding (4) are adapted to provide non-parallel magnetic fields. Sai...  
WO/2005/076293A1
The present invention relates to power supply control methods, devices and systems. In one of the embodiments, the invention is implemented by means of a transformer with a primary winding, a secondary winding SW for connection to a vari...  
WO2005034152A3
An electrical contactor (30) comprising a removable coil (32) has a contactor housing (38) including a cavity (48). A pair of fixed coil terminals (34) are mounted to the contactor housing proximate the cavity. The removable coil is remo...  
WO/2005/050341A1
The present invention relates to a voltage regulator, especially for power regulation, consisting of a toroid-core transformer (1), where its input is connected to distribution electricity network, and of control voltage source (2), wher...  
WO/2005/038831A1
A high-voltage transformer the leakage inductance of which can be accurately and easily regulated. Winding frames of a primary-side winding (6), a secondary-side winding (7), and a magnetic-coupling adjusting winding (8) are provided so ...  
WO/2005/036568A1
A controllable inductor, comprising first and second coaxial and concentric pipe elements, where said elements are connected to one another at both ends by means of magnetic end couplers, a first winding wound around both said elements, ...  
WO/2005/034160A1
A system for selecting coil voltage in an electrical device comprises a housing and a coil in the housing having a plurality of windings. Each winding has a pair of pins. A slider supports a plurality of moveable contacts and is moveably...  
WO/2005/034152A2
An electrical contactor (30) comprising a removable coil (32) has a contactor housing (38) including a cavity (48). A pair of fixed coil terminals (34) are mounted to the contactor housing proximate the cavity. The removable coil is remo...  
WO/2005/031771A1
The invention relates to an ignition coil (10) for a spark ignition engine comprising a coil core (12) in which a primary magnetic field (Hp) is inducible by means of a primary substentially reel-shaped current-carrying winding (14). The...  
WO/2005/026860A2
A preventive maintenance tapping technique includes noting a tap position of a load tap changer and noting a duration that the tap position has been held. The duration that the tap position has been held is compared to a threshold value,...  
WO/2005/022573A1
The invention relates to a method for monitoring the contamination of insulating oil in load tap changers, whereby only the latest transformer load current is measured, and the transfer of rust to be expected is determined by means of ca...  
WO/2005/015724A1
A complex resonance type converter having a sync rectifier circuit exhibits a high power conversion efficiency, while having a reduced circuit scale because of its simplified circuit arrangement and being able to be manufactured at a low...  
WO/2004/081955A1
The invention relates to a magnet arrangement comprising a magnet core (1) and a winding (2) which, when impinged upon with an electric current, produces a first magnetic flux (4) in the magnet core (1), and at least one separate magnet ...  
WO/2004/064084A2
An inductor (106) with self-damping properties for use in multiple applications including for high power broadband frequency applications is provided by a coil having an input end and an output end and wound about a core (112) of magneti...  
WO2004042911A3
The invention concerns a method for controlling an assembly of transformers magnetically independent of one another to obtain a desired global transformation of said assembly comprising the following steps: controlling (in 84) certain sw...  
WO/2004/042911A2
The invention concerns a method for controlling an assembly of transformers magnetically independent of one another to obtain a desired global transformation of said assembly comprising the following steps: controlling (in 84) certain sw...  
WO/2004/039274A1
A system (10) for heating a biological site in a patient's body includes a transformer (14) having a primary winding and a secondary winding. The secondary winding has a tap (24) to provide a ground reference and two sources of radio fre...  
WO/2004/040601A1
The invention relates to electrotechnical and electric energy engineering and can be used in the form of an adjustable reactive resistance, in particular in the form of a static compensator of a surplus reactive power in electric power n...  
WO/2004/040600A1
The invention relates to a transformer including a first (1), a second (2) and a third (3) leg which are aligned in parallel and are magnetically connected, having at least a first primary winding (4) and at least two secondary windings ...  
WO/2004/025703A2
A system for electrically contacting a semiconductor wafer (22 in Fig. 1) during implanting of the wafer includes one or more pairs of closely spaced contacts located adjacent the wafer (12a and 12b in Fig 1) and a driving circuit connec...  
WO/2004/001778A1
The invention relates to circuit arrangement for generating an X-ray tube voltage (Ut), comprising a mains input circuit (1) for generating an intermediate circuit voltage (Udc), an inverter circuit (2) for converting the intermediate ci...  
WO/2003/100798A1
The invention relates to a current collector (4), especially a current collector of a regulating transformer, for the sliding displacement on a contact path (5) which is formed by at least partially insulated segments, especially winding...  
WO/2003/055283A1
Programmable alternating voltage stabiliser/regulator system for feeding a load, in particular consisting of fluorescent bulbs, wherein the selective connection, even with powered load (through electromagnetic selection relays (30,31) an...  
WO/2003/044612A1
The invention relates to a circuit component (L1) with controllable impedance, comprising a body (1) of a magnetisable material, a main winding (A1) wound round the body (1) about a first axis and a control winding (A2) wound round the b...  
WO/2003/044613A1
A controllable transformer device comprising a body (1) of a magnetic material, a primary winding (4) wound round the body (1) about a first axis, a secondary winding (2) wound round the body (1) about a second axis at right angles to th...  
WO/2003/041247A1
An electromagnetic generator (10, 130, 150, 170) without moving parts includes a permanent magnet (12, 154, 174) and a magnetic core (16, 132, 156) including first and second magnetic paths (18, 20). A first input coil (26, 166) and a fi...  
WO2002086647A3
The invention relates to an arrangement for automatically influencing a mains supply. A voltage transformer is provided as a pilot transformer which detects the real value of the voltage which is to be adjusted and which transmits said v...  
WO2002023301A9
A transformer (90) includes taps (96a, 96b, 96c) by which electrical contact can be made to winding section (90a, 90b, 90c) of the transformer (90) at locations along its length between its end terminals. A first switch (94) permits cont...  
WO/2002/103725A1
An electrical apparatus and method for matching the input power source and output impedance of the electrical apparatus utilizes electromagnetic devices having two or more inductive windings, which may be connected in various series and/...  
WO/2002/093600A1
The invention relates to a load selector for tapped transformers used for the uninterrupted switching over between tappings of a regulating winding of a tapped transformer. The load selector comprises a cylinder, which is made of an insu...  
WO/2002/086647A2
The invention relates to an arrangement for automatically influencing a mains supply. A voltage transformer is provided as a pilot transformer which detects the real value of the voltage which is to be adjusted and which transmits said v...  
WO2002048718A3
The present invention discloses a method and apparatus (5) for condition diagnosing of an inductive power device (1), such as a transformer or reactor, having power windings (2) immersed in a fluid (3) being cooled by cooling devices (4)...  
WO2002045101A3
A control system, method and apparatus is provided for an orthogonally variable inductor. A method and apparatus is also provided for rectifying an AC power supply for a DC load. DC voltage regulation is also provided. Rectification and ...  
WO/2002/058088A1
The invention relates to a thyristor tap changer that comprises a mechanical tap selector and a diverter switch with thyristors as the switching means. The inventive tap changer is further characterized in that only the tap selector is m...  
WO2002023301A8
A transformer (90) includes taps (96a, 96b, 96c) by which electrical contact can be made to winding section (90a, 90b, 90c) of the transformer (90) at locations along its length between its end terminals. A first switch (94) permits cont...  
WO2002027910A3
A voltage regulator (100) apparatus comprises a transformer having a primary winding (102) and a secondary winding (104), a plurality of further windings selectively connected to one of the primary winding and a secondary winding, and a ...  
WO/2002/048729A1
A method and means for diagnosing transformer tap changers is provided. Pressure is monitored in an insulating liquid of a tap changer for a period of time in which switching of the tap changer is carried through. Switching-related infor...  
WO/2002/048730A1
The present invention discloses a method and apparatus (4) for condition diagnosing of a tap changer (1) immersed in a cooling fluid (3), controlling and regulating an inductive power device (5), such as a transformer or reactor. The dia...  
WO/2002/048718A2
The present invention discloses a method and apparatus (5) for condition diagnosing of an inductive power device (1), such as a transformer or reactor, having power windings (2) immersed in a fluid (3) being cooled by cooling devices (4)...  
WO/2002/045101A2
A control system, method and apparatus is provided for an orthogonally variable inductor. A method and apparatus is also provided for rectifying an AC power supply for a DC load. DC voltage regulation is also provided. Rectification and ...  
WO/2002/031847A1
The invention relates to a energy accumulator for a sequence switch, provided with a lifting carriage (8), which may be operated by a drive shaft and a driven piece (9), which in turn operates a drive shaft connected to the transfer swit...  
WO/2002/027910A2
A voltage regulator (100) apparatus comprises a transformer having a primary winding (102) and a secondary winding (104), a plurality of further windings selectively connected to one of the primary winding and a secondary winding, and a ...  
WO2001075913A3
An induction device comprises a core (1) of magnetically permeable material, and is characterized in that the core comprises at least one component (3, 4, 5) comprising finely divided magnetic particles in a matrix of a dielectric materi...  

Matches 301 - 350 out of 6,691