Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 401 - 450 out of 6,623

Document Document Title
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 ...  
WO/1988/010502A1
An arrangement of an on-load change-over switch of a sequence switch for uninterrupted switching of the regulating coil of a transformer. On-load change-over switching is usually effected with mechanical switch elements, which entails un...  
WO/1988/005208A1
A system is disclosed for generating the gate trigger voltage of thyristors connected in antiparallel and arranged parallel to the latching contact of an on-load change-over switch. Until now, the energy for the gate trigger voltage nece...  
WO/1988/001791A1
A transformer apparatus including a magnetic core (2) and a main winding (N1) is characterized in that an auxiliary winding (N2) is added in operative relation to the magnetic core (2), whereby a predetermined amount of demagnetizing cur...  
WO/1987/001505A1
An inductive component for universal use in any electrical/electronic circuits, whose coefficient of self-induction (L) is independent of the signal, is constant, electrically controllable and can be varied significantly. The component (...  
WO/1983/002194A1
The transformer comprises a magnetic circuit (8) as well as, for each phase, a high voltage electric circuit (17) and a low voltage electric circuit (18), both wound about at least one section of the magnetic circuit (8). The electric ci...  
JP2020027869A
[Subject] A template for assemblies used when assembling a manufacturing method of a transformer which can raise safety at the time of assembling a transformer, and a transformer, while being able to shorten working hours in a height is ...  
JP2020027913A
[Subject] A tap changer is provided at the time of load which clearing work at the time of a maintenance equipped with an easy tap display for indication. [Means for Solution] Tap display for indication 107 is separated from control part...  
JP2020027867A
[Subject] A protective cover for tap change machines which can check a tap location without removing is provided. [Means for Solution] Protective cover 1 of an embodiment has body part 1a which covers the whole handle 8, and formed windo...  
JP2020027868A
[Subject] A template for assemblies used when assembling a manufacturing method of a transformer which can raise safety at the time of assembling a transformer, and a transformer, while being able to shorten working hours in a height is ...  
JP2020024997A
[Subject] In a reactor which includes in layers a wiring board in which a wiring board and control winding in which the main winding was formed were formed in a planar type core, magnetic flux density formed of control current of control...  
JP6640651B2  
JP2020500392A
The present invention relates to the method of controlling the change module based on the solid state switch element made from a thyristor. This change module comprises the first Roll style cell and the second Roll style cell which were ...  
JP2019212821A
[Subject] A torque adjustment and a tap switching arrangement of a circumference of a driving shaft which can adjust torque are provided. [Means for Solution] A torque adjustment is provided with the following. Driving shaft 4 which rota...  
JP6611791B2  
JP6611792B2  
JP2019533305A
In a method for switching tap changer 11 at the time of load, tap changer 11 is at the time of load, -Having one fine-tuning selection machine 20, a -1 One introduction selection machine 40, and -1 One change switch 60, fine-tuning selec...  
JP2019179929A
To provide a three-phase transformer in which three phases are balanced, a leakage flux is small, and efficiency is high.A three-phase transformer includes: a first plate-like iron core and a second plate-like iron core disposed to face ...  
JP6586461B2  
JP6580071B2  
JP6577545B2  
JP2019145720A
To provide a protection device of oil-filled electric equipment, capable of maintaining an insulation performance of vegetable oil filled as insulation oil in open type oil-filled electric equipment.An on-load tap changer fills a palm co...  
JP6566951B2  
JP6563000B2  
JP6557668B2  
JP2019125706A
To provide a tap changer that can enhance a degree of freedom of arrangement of an operator to make it easy to operate the operator and confirm a tap position, and a stationary induction apparatus with the same.A tap changer 6 according ...  
JP2019520700A
[Means for Solution] It sets on tap changer head 20 at the time of load for tap changer 10 at the time of load, A tap changer head is the 1st field currently formed in tap changer head 20 at the time of the load at the time of this load,...  
JP2019114587A
To provide a maintaining method for insulation performance of insulating oil, which prevents deterioration of the insulation performance of the insulating oil due to gas generated at the time of tap switching operation of a switch while ...  
JP6542484B2  
JP6538451B2  

Matches 401 - 450 out of 6,623