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Nine-pillar composite core transformer

A combination of transformer and column technology, applied in the direction of transformer/inductor core, transformer/inductor coil/winding/connection, and conversion equipment without intermediate conversion to AC, which can solve the problems of low reliability, complex structure and non-continuous adjustment and other issues

Active Publication Date: 2017-08-04
正耐电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The non-contact stepless on-load voltage regulating transformer of Chinese patent 200620108454.1 adopts the series connection method of the compensation transformer and the primary winding of the main transformer, which can realize the stepless voltage regulation of the main transformer, but its dynamic voltage regulator is composed of three-phase PWM Composed of rectifier, capacitor energy storage, inverter and filter, the structure is more complicated and the cost is higher
There is also a way to use winding taps on the high-voltage winding and use multiple sets of bidirectional thyristors for graded adjustment, and use a computer to issue instructions to change the working state of the thyristors when the voltage crosses zero, and automatically change the number of turns of the high-voltage winding to achieve voltage regulation on the low-voltage side. A large number of thyristor devices must be used and connected in series in the main circuit, resulting in complex structure and low reliability
Chinese patent 02101996.7’s zigzag compensation transformer and phase-shifting voltage regulation method adopts the structure of two sets of three-column cores and hexagonal regulating windings, and adjusts the voltage of the primary winding of the main transformer by transferring the voltage phase of the regulating windings. The method of adjusting the voltage phasor of the winding and adjusting the primary winding of the main transformer in series with it is essentially changing the magnetic flux in the iron core to change the potential value of the winding, but the wiring method of twelve adjustment terminals brings solved the problem of complex structure and non-continuous adjustment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: as figure 1 As shown, three (groups) of three-column Ts with equal core cross-sectional areas are used a1 , T a2 , T a3 , T b1 , T b2 , T b3 , T c1 , T c2 , T c3 Nine pillars, and vertically combined with four yokes whose cross-sectional area is equal to that of the pillars figure 2 In the three-layer core structure shown, the silicon steel sheets are stacked using the current full-slope and half-slope joint technology; in its three (left) side column core T a1 , T b1 , T c1 Set W in turn a1 with W a10 , W b1 with W b10 , W c1 with W c10 Three primary and three secondary side column windings, in the center column core T a2 , T b2 , T c2 , W of the upper and middle column windings a2 with W a20 , W b2 with W b20 , W c2 with W c20 Three primary and three secondary windings, in the three (right) side column core T a3 , T b3 , T c3 Set W in turn a3 with W a30 , W b3 with W b30 , W c3 with W c30 Three primary windings and thre...

Embodiment 2

[0014] Embodiment 2: A three-layer iron core structure composed of nine core columns and four cross yokes vertically combined is adopted, such as figure 2 , image 3 As shown, the ratio of the cross-sectional area of ​​the core column to the cross-yoke cross-sectional area is 1:1.1, and the silicon steel sheet adopts a superimposed structure with fully inclined joints and right-angled joints. The design and assembly of the three three-phase iron cores are the same as those of the current technology. ; at T a1 with T a2 with T a3 Upper core, T b1 with T b2 with T b3 Middle core, T c1 with T c2 with T c3 The lower core consists of nine core columns with one primary winding and two secondary windings respectively, and the three windings on each core column correspond to W a1 with W a10 with W a11 , W a2 with W a20 with W a21 , W a3 with W a30 with W a31 , W b1 with W b10 with W b11 , W b2 with W b20 with W b21 , W b3 with W b30with W b31 , W c1 with W ...

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Abstract

A nine-column combined core transformer, the purpose of which is to simultaneously perform stepless and loaded voltage regulation during voltage conversion; the invention includes a primary winding, a secondary winding, a capacitor, a regulator and three three-column cores; three The three-column core has nine core columns Ta1, Ta2, Ta3, Tb1, Tb2, Tb3, Tc1, Tc2, and Tc3 with equal cross-sectional areas, which are stacked into a three-layer core structure by vertical combination, and the core columns are fitted one by one. Windings Wa1, Wa2, Wa3, Wb1, Wb2, Wb3, Wc1, Wc2, Wc3 and secondary windings Wa10, Wa20, Wa30, Wb10, Wb20, Wb30, Wc10, Wc20, Wc30; the structure of the primary winding, the number of coil turns and the winding In the same direction, the winding structure, number of turns and winding direction of the secondary winding are also the same; capacitors C01, C02, and C03 are sequentially connected between c2 and b0, a2 and c0, b2 and a0 three pairs of terminals; the regulator uses a rectifier diode D1-D6 is connected to form a three-phase rectifier bridge whose input terminals are connected to a0, b0, and c0, and the electronic components can be turned off by connecting the DC terminal of the three-phase rectifier bridge in the manner of connecting the DC positive terminal to the positive pole.

Description

technical field [0001] The invention belongs to the field of transformers and AC stable power supplies, and relates to a nine-column combined core transformer. Background technique [0002] The current power technology is to use two kinds of power equipment to complete the voltage transformation and voltage stabilization step by step. The on-load tap changer can adjust the voltage step by step within the high-voltage tapping range of positive and negative 4*2.5% of the rated voltage. Although the high-power AC voltage stabilizer has the continuous adjustment function of positive and negative 20% of the rated voltage, its The rated capacity should not exceed 200KVA. The current on-load voltage regulation technology generally draws appropriate taps on the high-voltage winding. The on-load tap-changer is composed of a switch for quickly switching current and a selector for selecting taps. The tap selector is used to make a tap The process of connecting the next tap before the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/06H02M5/10H02M3/10H01F27/24H01F27/28
Inventor 乔宏伟
Owner 正耐电气股份有限公司