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JP2003077729 |
To improve unbalance attenuation characteristics against the ground by reducing the winding resistance deviation between coils without losing leakage inductance, line capacity, winding working efficiency, and the like in a choke coil hav...
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JP2003068539 |
To provide an electromagnetic equipment that has a simple structure of a magnetic circuit and a wind dress of winding, at the same time, does not require any insulating films, at the same time, reduces a harmonic current, and can vary re...
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JP3403930 |
To enhance testing efficiency in testing the transformation ratio of a transformer by improving the workability. The voltage of the secondary winding 24S of a boosting transformer 24 is measured, as a voltage value in proportion to itsel...
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JP2003061358 |
To prevent increase in size of a coil and shorten the time required for design of a power supply. A coil 4 for control of harmonics is provided between an input terminal 2 and a rectifying circuit 3, so that two conductive wires wound ar...
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JP3400960 |
To provide an automatic voltage controller for preventing the generation of large surge currents or large surge voltages, and for preventing the inter-phase balance of a transformer from being lost even when a load is unbalanced, and for...
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JP2003031426 |
To solve the problem that, if the selection of a plurality of LTC transformers connected in parallel is based on a predetermined order of priority, the tap of the LTC transformer having the highest priority is most frequently changed to ...
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JP2003031427 |
To solve the problem that the conventional three-phase on-load voltage-phase regulating transformer is composed of a main transformer and a separate phase shifter, and needs an area for installing both the main transformer and the phase ...
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JP3391104 |
PURPOSE: To eliminate a rotating mechanism and to simply automatically regulate a voltage by variably controlling a voltage to be applied to the primary winding of a transformer by polarity switching in response to detected voltage. CONS...
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JP2003017339 |
To provide a choke coil capable of decreasing power loss in a power supply circuit and the number of components.A tap 15 is arranged in the center of a main winding 11, a sub-winding 16 is wound from the tap 15 along the main winding 11,...
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JP3385731 |
PURPOSE: To reduce costs a of manufacture of a device and of set up in filed by unifying housing panels of control equipment, etc. CONSTITUTION: In a drive box 36, a special panel 40 is fixed through an insulator 41, and the special pane...
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JP3387238 |
PURPOSE: To realize compactness and to eliminate the need for labor and time for regular maintenance and correction of failures by forming the device of a common control part and three cassette method assembly bodies and by mounting the ...
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JP3387285 |
To prevent chattering at the time of closing a vacuum switch and to ensure a stabilized trip performance regardless of the contacting state of the contact. When a disc cam 40 is rotating, rollers 51, 52 move in the switching groove of th...
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JP2003007549 |
To prevent deterioration of working efficiency of a coil winding, in a single phase transformer which can switch a tap voltage, caused by the work for guiding an intermediate guiding tap wire by automatically and temporarily interrupting...
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JP2003007550 |
To provide a limit switch manipulation mechanism of manual handle which can be manufactured in a shorter period than that of a prior art with less number of components.In the limit switch manipulation mechanism of manual handle 3, when a...
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JP2002359126 |
To provide an inductance component which can obtain proper magnetic bias effect by increasing an insertion amount of a permanent magnet without changing a gap amount. A permanent magnet 13 is disposed in a gap t1 between cores 11, 12 whe...
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JP3378340 |
PURPOSE: To suppress an overcurrent generated at the time of switching a tap, by a method wherein a timer having a time limit adequate to sufficient attenuation of the amount of biased magnetization is used for setting an interval of the...
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JP2002319512 |
To suppress temperature rise at the time of changeover from a first tap to a second tap to contrive miniaturization of an on-load tap changer.In an on-load tap changer, a second tap is operated next to a first tap 13 insulated with insul...
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JP2002291150 |
To provide a commercially usable current limiter device by solving various problems in currently proposed current limiter devices.In this current limiter device with a saturable DC reactor, a DC output terminal of a full wave rectifier i...
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JP2002280229 |
To commonly use a changeover switch in gas insulation and an oil insulation by reducing in size the dimension of the switch using a vacuum valve in a cut-off unit of an on-load tap changer.The on-load tap changer is insulated by the insu...
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JP2002280228 |
To form a structure, having interchangeability for use with a changeover switch using a vacuum valve in a cut-off unit of an on-load tap changer, rather than a changeover switch of a conventional on-load tap changer.The on-load tap chang...
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JP3348654 |
To make it possible to achieve high efficiency over the wide load range with the small configuration, by providing the first selecting means which selects any of the input terminals of the primary winding, and the second selecting means ...
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JP3348478 |
PURPOSE: To inhibit the unbalance of a current allotment due to a circulating current in a short circuit to prevent the generation of a failure in the case of the title stationary induction apparatus of such a constitution that this shor...
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JP3343945 |
PURPOSE: To provide a transformer winding wire which is constant and lessened in impedance between a primary and a secondary winding, very small in impedance change caused by the change of a primary tap, and set to zero in primary isolat...
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JP3343084 |
To provide a magnetic circuit structure for easily and economically manufacturing the magnetic circuit of three-phase crosslinked magnetic flux control transformer, without using more cores than necessary. A three-phase core 16, constitu...
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JP3343083 |
To control voltage over a wide range, independently of the existence and power factor of a load without preparing a tap for adjusting the voltage of a transformer. A 1st magnetic circuit is constituted in that cut faces 15 of 1st and 2nd...
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JP2002237423 |
To provide a transformer which is equipped with separate windings that have a high inter-winding withstand voltage and a low inter-winding capacitance so as to have a very low and controlled inductance leakage and a high coupling coeffic...
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JP2002216596 |
To provide a vacuum valve changeover switch where the device as a whole can be greatly downsized by downsizing a resistor by shortening the difference in current flow time.In the vacuum valve changeover switch where a vacuum valve operat...
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JP2002209314 |
To provide a power-receiving and transforming device which enables a test of a transformer single body safely without removing an incoming cable in the case of a periodic test of a transformer or installing a grounding apparatus on the t...
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JP2002204575 |
To provide a voltage regulator which can maintain a voltage regulating function regardless of a system changeover on a distribution line and the installation state of a distributed power supply.This voltage regulator is a tap-changing vo...
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JP2002198230 |
To provide a changeover-confirming mechanism and a protective system, with which a small-sized safe on-load tap changer provided with an additional fault-preventing mechanism that can prevent the occurrence of serious faults, even if the...
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JP2002184629 |
To reduce installation space.A transformer tank 1 is divided into three chambers 12 to 14, and the first divided chamber 12 is provided with a space, including the bottom of the transformer tank to the inner wall surface of a transformer...
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JP2002175749 |
To provide a on-load tap switch having a small and simple constitution and enhanced reliability.The tap switch to work for a transformer having a plurality of taps from the windings is composed of a switching apparatus to change over one...
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JP2002158124 |
To provide an inductance component whose characteristics do not deteriorate by reducing the limitation in the shape of a permanent magnet to be installed, and inhibiting the generation of heat of the permanent magnet by magnetic flux due...
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JP3311391 |
PURPOSE: To control the spatial distribution of a leakage magnetic flux related to a high-frequency switching power converter, by providing a conductive medium near a magnetic medium and a coil, so that a border which confines such magne...
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JP2002134338 |
To provide a flexible power facility that can cope with diversification of loads, such as system voltage fluctuations, etc., by realizing electromagnetic equipment which changes reactance over a wide range, without using taps making chan...
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JP2002134337 |
To provide a small-sized inexpensive roller contact device for tap selector and a tap selector.This roller contact device for tap selector is constituted with set of an upper roller and a lower roller being held on a frame, and a ring-li...
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JP2002129230 |
To easily change connection between a common tap and an individual tap.The matched transformer interposed between an electric source (not shown in figure) and a high frequency heating coil (not shown in figure), supplied with power by th...
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JP2002124421 |
In an induction device, in which a cable is used for winding and which is advantageous in an insulating structure and excellent in environment, firstly, to realize the induction device having a small impedance fluctuation in adjusting vo...
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JP2002124422 |
To provide a loaded tap changer which has a small and simple constitution and an excellent breaking performance and high reliability.A cam 27 is disposed at the center of a driving shaft 126 and four driving flanges 8a to 8d are connecte...
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JP2002124420 |
To provide a tap selector that can be made compact while the selector maintains prescribed dielectric strength.Lead terminal attaching sections 22a respectively provided at the outer end sections of fixed contacts T1a-T10a are bent perpe...
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JP2002110436 |
To make a main change-over switch and an auxiliary change-over switch able to be driven by means of a common driving shaft.The driving mechanism of the auxiliary change-over switch 6 is constituted of a toggle mechanism which is provided...
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JP2002093641 |
To provide a highly reliable voltage adjustable voltage transformer, which does not need a reactor and a resistance element and in which noise will not appear, when voltage is switched.In the multiple winding wire transformer, at least t...
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JP3292430 |
PURPOSE: To exactly grasp the operation state of a high-voltage automatic voltage adjuster by collecting the data for grasping the operation state of the high-voltage automatic voltage adjuster installed on a high-voltage distribution li...
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JP2002093640 |
To make an inspection easily, even if the conditions of a work site is poor.In a transformer for changing a tap under load, in which a switchgear 12 such as a switchgear for switching a tap under load or a switchgear for selecting a tap,...
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JP2002083724 |
To provide a magnetic element which can exhibit magnetic bias effect over an entire drum-shaped core piece, minimize magnetic saturation, and be made inexpensive and small in size and weight.The magnetic element includes a magnetic core,...
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JP2002083722 |
To provide an inductor and a transformer where a permanent magnet for applying a magnetic bias is arranged in the air gap of a magnetic core, and which can reduce influences of the magnetic field of a excitation coil on the permanent mag...
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JP3289268 |
PURPOSE: To miniaturize a tap change-over switch of a neutral point grounded reactor having dual rated current specified reactor and a resistor to reduce the size of the neutral point grounded reactor. CONSTITUTION: The neutral point gro...
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JP2002075750 |
To provide a transformer, which can easily make leakage inductances variable and a power unit, which can effectively utilize the capacity of the transformer.The transformer 10 is provided with bobbins 12 and a core 14. The center shaft o...
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JP3287957 |
PURPOSE: To provide an AC arc welding machine capable of appropriately changing the gap according to the position of a movable core with a simple structure at a low cost. CONSTITUTION: A transformer having a fixed core 1, primary and sec...
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JP3285977 |
PURPOSE: To provide an energy storage apparatus of a on-load tap changer having an excellent transmission efficiency. CONSTITUTION: The loading points of an eccentric cam 2 and an energy storage spring 11a are matched, a winding case 5 i...
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