CN201663037U

CN201663037U - High-voltage transformer

Info

Publication number: CN201663037U
Application number: CN2009203140412U
Authority: CN
Inventors: 陈建宏; 沈里和
Original assignee: Huanyong Technology Co Ltd; Guolian Electronics (Shanghai) Co Ltd
Current assignee: Huanyong Technology Co Ltd; Guolian Electronics (Shanghai) Co Ltd; Ampower Technology Co Ltd
Priority date: 2009-11-04
Filing date: 2009-11-04
Publication date: 2010-12-01
Anticipated expiration: 2019-11-04

Abstract

A high-voltage transformer comprises a first iron core and a second iron core. A primary winding can be wound on the first iron core and a pair of secondary windings can be wound on the second iron core. The secondary windings are in axisymmetric arrangement relative to the primary winding. As the secondary windings are in axisymmetric arrangement relative to the primary winding, the magnetic flux of the secondary windings is identical; furthermore, the output current of the secondary windings is also the same.

Description

High-tension transformer

Technical field

The utility model relates to a kind of high-tension transformer, particularly a kind of high-tension transformer that is used for converter.

Background technology

Usually, magnet assembly, as: transformers etc. are widely used in electronic installation.For example, LCD (liquid crystal display, LCD) the employed high-tension transformer of the converter on the panel voltage transitions that is used for receiving is the required high voltage of LCD, with drive cold-cathode tube in the LCD panel (Cold Cathode FluorescentLamp, CCFL).

Along with the increase day by day of LCD panel size, the quantity of cold-cathode tube also increases relatively, thereby the load that high-tension transformer connected increases.Because cold-cathode tube impedance each other is neither identical, cause the output current of secondary winding of high-tension transformer inequality, cause the luminance difference of cold-cathode tube excessive.

The utility model content

In view of this, the high-tension transformer of the exportable same current of a kind of secondary winding need be provided.

A kind of high-tension transformer comprises first iron core and second iron core.First iron core is used to twine elementary winding, and second iron core is used to twine a pair of secondary winding.The described relatively elementary winding axial symmetry of described secondary winding is provided with.

Preferably, form the gap between described first iron core and described second iron core.

Preferably, described first iron core is an E sections core, and described second iron core is E or I sections core.

Preferably, described elementary winding is wound in the zone line of described first iron core.

Because of the described relatively elementary winding axial symmetry of described secondary winding of the present utility model is provided with, thereby the magnetic flux that flows through described secondary winding is identical, and then the output current of described secondary winding is identical.

Description of drawings

Fig. 1 is the schematic diagram of the high-tension transformer of first kind of execution mode of the utility model.

Fig. 2 is the schematic diagram of the high-tension transformer of second kind of execution mode of the utility model.

Fig. 3 is the schematic diagram of the high-tension transformer of the third execution mode of the utility model.

Embodiment

In all execution modes of the present utility model, iron core is contained in the drum stand (not shown), elementary winding and secondary winding are wound in the corresponding zone of drum stand, for convenience of description, directly describe iron core and be used to twine elementary winding and secondary winding, omission is to the description of drum stand, in this special instruction.

Figure 1 shows that the schematic diagram of the high-tension transformer 10 of first kind of execution mode of the utility model.Wherein, high-tension transformer 10 comprises first iron core 12 and second iron core 14.In the present embodiment, first iron core 12 is the E type, and it comprises first outer webs 120 in the middle of being positioned at.Second iron core 14 also is the E type, and it comprises second outer webs 140 that a pair of relative first outer webs, 120 axial symmetry are provided with.Between first iron core 12 and second iron core 14, also form a gap 16, be used to adjust the leakage inductance of high-tension transformer 10.

In the present embodiment, first outer webs 120 is twined elementary winding P1, and one of them second outer webs 140 is twined secondary winding S1, and another second outer webs 140 is twined secondary winding S2, and promptly two relative elementary winding P1 axial symmetry with S2 of secondary winding S1 are provided with.Like this, between elementary winding P1 and secondary winding S1, form magnetic circuit M1, between elementary winding P1 and secondary winding S2, form magnetic circuit M2.

Because of two relative elementary winding P1 axial symmetry with S2 of secondary winding S1 are provided with, thereby among magnetic flux mean allocation to the two secondary winding S1 and S2 that elementary winding P1 produces.In other words, the magnetic flux among the magnetic circuit M1 equals the magnetic flux among the magnetic circuit M2, thereby two secondary winding S1 have identical output current with S2, has promptly reduced the current difference of the load that high-tension transformer 10 connected.

If the impedance of the load that two secondary winding S1 are connected with S2 is inequality, then form magnetic circuit M3 between two secondary winding S1 and the S2, the magnetic flux that this magnetic circuit M3 produces can two secondary winding S1 of autobalance and the output current of S2.And two secondary winding S1 and S2 are chained together, and the magnetic flux that then flows through two secondary winding S1 and S2 is identical, and promptly two secondary winding S1 have identical output current with S2.

Figure 2 shows that the schematic diagram of the high-tension transformer 20 of second kind of execution mode of the utility model.The position of first iron core 22 of the high-tension transformer 20 of second kind of execution mode and the structure of second iron core 24 and the elementary winding P1 all high-tension transformer 10 with first kind of execution mode is identical, and its difference is: the secondary winding S1 of high-tension transformer 20 and S2 lay respectively at the pair of inside arm 240 of second iron core 24.The operation principle of high-tension transformer 20 is identical with the operation principle of high-tension transformer 10, and produces identical effect.

Figure 3 shows that the schematic diagram of the high-tension transformer 30 of the third execution mode of the utility model.All the high-tension transformer 20 with second kind of execution mode is identical with structure in the position of the elementary winding P1 of the high-tension transformer 30 of the third execution mode and two secondary winding S1 and S2, its difference is: first iron core 32 of high-tension transformer 30 is E sections core, and second iron core 34 is an I sections core.The operation principle of high-tension transformer 30 is identical with the operation principle of high-tension transformer 20, and produces identical effect.

Claims

1. a high-tension transformer is characterized in that, comprising:

First iron core is used to twine elementary winding; And

Second iron core is used to twine a pair of secondary winding;

Wherein, the described relatively elementary winding axial symmetry of described secondary winding is provided with.

2. transformer as claimed in claim 1 is characterized in that, forms the gap between described first iron core and described second iron core.

3. transformer as claimed in claim 1 is characterized in that, described first iron core is an E sections core, and described second iron core is E or I sections core.

4. transformer as claimed in claim 3 is characterized in that described elementary winding is wound in the zone line of described first iron core.

5. transformer as claimed in claim 1 is characterized in that, between described secondary winding and the described elementary winding and described secondary winding be formed with magnetic circuit each other.