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Magnetic control adjustable reactor

A reactor and reactance adjustment technology, applied in variable inductors, inductors, variable transformers, etc., can solve the problems of poor reliability of the power system, small reactor excitation impedance, complex line cost, etc., to achieve accurate adjustment, High adjustment accuracy, simple and convenient adjustment

Inactive Publication Date: 2018-05-01
TIANJIN TIANCHUAN XINFENG ELECTRICAL TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3. DC magnetic assist type: The DC magnetic assist type scheme is adopted to change the AC equivalent magnetic permeability by adjusting the magnitude of the DC excitation current to realize continuous adjustment of the inductance. The response speed is fast, but the iron core is in a state of magnetic saturation during long-term normal operation. The loss is large, the noise is large, and the harmonics are large, and it is difficult to make the excitation impedance of the reactor small through magnetic saturation
[0010] 5. Use the external electronic control circuit to adjust, the circuit is complicated and the cost is too high, the reliability of the power system is poor, and the price is expensive

Method used

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Experimental program
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Effect test

Embodiment 1

[0048] A new type of magnetron coarse adjustment single-phase reactor, including three groups of iron cores 3 (one group is the reactor iron core, two groups are the transformer iron core), two transformer windings 8, a reactor winding 6 and a skeleton, so The skeleton is composed of two transverse partitions 5 and 12 vertical partitions 4, the transverse partitions are of a rectangular frame structure, and the vertical partitions are of a rectangular plate structure.

[0049] Three sets of iron cores are longitudinally aligned in parallel and spaced apart, and insulating strips 7 are filled and installed on both sides between adjacent two sets of iron cores. The tongue of the iron core is fitted with two transverse partitions at the upper and lower intervals, and four vertical partitions are installed on the four sides of the tongue of each group of iron cores between the two transverse partitions. The three sets of iron cores are installed with 12 vertical partitions in total...

Embodiment 2

[0070] A new type of magnetron fine-tuned single-phase reactor also includes three sets of iron cores, a transformer winding, a variable impedance winding, a reactor winding and a skeleton. winding method. A transformer winding is wound around the middle iron core and the vertical partitions on its four sides, and a variable impedance winding is wound around the rear iron core and the vertical partitions on its four sides. The front iron core is wound with a reactor winding on the outside of the middle iron core transformer winding, the structure is as follows Figures 7 to 9 shown.

[0071] In the winding process, the transformer winding of the middle iron core is wound first, the reactor winding is wound back, and the variable impedance winding of the rear iron core is wound separately, and the three groups are completely isolated.

[0072] A junction box is installed on the top of the three sets of iron cores, and an adjustment knob 9 is installed on the junction box. Th...

Embodiment 3

[0085] A new type of magnetron coarse adjustment three-phase reactor, including three groups of EI-type iron cores, six transformer windings, three reactor windings and three groups of skeletons. The longitudinally opposite tongues and both sides of the iron core are fitted with a set of skeletons. Each set of skeletons is composed of two transverse partitions and 12 vertical partitions. The transverse partitions are of rectangular frame structure and the vertical partitions are of rectangular plate structure. , the assembling method of each group of skeletons, the winding method of the transformer winding and the reactor winding are the same as those of the first embodiment. like Figures 13 to 16 shown.

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Abstract

The invention relates to a magnetically controlled adjustable reactor (single and three-phase). Using the principle of transforming impedance of a transformer, a reactor and a transformer are wound together according to a certain ratio, which is equivalent to a reactor and a transformer connected in series. Together, change the transformer secondary impedance to adjust the primary impedance. The small impedance transformation is easy to realize, and the transformation of the reactance rate K from 4.5% to 6% can be realized, and it can also be fine-tuned at about ±10% of the determined reactance rate K to make the adjustment more accurate. In addition to the adjustable impedance during work, there is no difference between the wiring and ordinary reactors. After the impedance is adjusted at the factory, its impedance changes in direct proportion with the harmonics of the power grid.

Description

technical field [0001] The invention belongs to the technical field of passive filtering of reactive power compensation control devices for complete switchgear of low-voltage electrical appliances, and plays the role of suppressing or eliminating harmonics and limiting closing inrush current when harmonics exist in a power grid system, and relates to a reactor, in particular It is a magnetron adjustable reactor. Background technique [0002] At present, the domestic passive filter uses the principle of matching the reactance of the capacitor branch to resonate a certain harmonic to filter out the harmonics of the power grid. The technical requirements require that the series reactance and the parameters of the capacitor are very well matched to achieve the expected effect. Generally, the use of The method of adjusting the air gap of the reactor is used to match the parameters. To adjust the air gap, the reactance of the reactor can only be adjusted once when it leaves the fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F29/00H01F27/26H01F27/30H01F27/24H02J3/18
CPCY02E40/30
Inventor 李魁文
Owner TIANJIN TIANCHUAN XINFENG ELECTRICAL TECH DEV CO LTD
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