CN200959278Y - External U-shaped closed magnetic circuit transformer structure - Google Patents

Abstract

The utility model relates to an external U type closed magnetic circuit transformer structure, it includes the magnetic core, glues the core, its characterized in that: one or two primary windings are arranged in the middle of the rubber core, two secondary windings are arranged on two sides of each primary winding, and a U-shaped magnetic core is externally arranged outside each primary winding. The utility model discloses an external U type closed magnetic circuit transformer structure, elementary both sides respectively have a secondary. And a U-shaped magnetic core is arranged outside the primary winding and connected with the center pillar magnetic core to form a closed primary magnetic circuit. At the moment, the secondary stages on the two sides simultaneously obtain a higher leakage inductance which is 3-5 times higher than that of the conventional product; an ideal leakage inductance can be obtained without arranging an empty slot; if the size of the U-shaped magnetic core is adjusted, the size of secondary leakage inductance can be adjusted; reducing the occupied space and improving the flexibility of application.

Description

External U-shaped closed magnetic circuit transformer structure

technical field

The utility model relates to an improved transformer structure, in particular to an external U-shaped closed magnetic circuit transformer structure.

Background technique

In the prior art, there are quite a lot of improvements in the structure of the transformer, the main purpose of which is how to reduce the volume of the transformer, which shows the demand for volume reduction, especially today's electronic devices are mostly small, miniaturized, and thin As a trend, the corresponding and related electronic component configuration must be designed to reduce the volume and reduce the construction space; as far as display devices with a considerable demand in the market are concerned, the main development direction is towards thinner design. However, the thin design contains many technical bottlenecks that need to be overcome urgently. The light source of the liquid crystal display is mainly divided into two parts: the external light source and the backlight light source. The external light source is an objective and uncontrollable light source, which is absorbed by the liquid crystal crystal; while the backlight light source is provided by the cold cathode fluorescent tube, which is the main light source on the back of the internal LCD panel. Brightness and uniformity directly affect color contrast, full-screen area brightness effects, viewing angles, and so on. Due to its own characteristics and technical problems, there are often obvious uneven brightness phenomena on the left and right sides and the center of the display, which are called "dark areas". For the phenomenon of dark areas, increasing the number of lamps is a common method, so large-size LCD screens must use multiple lamps to achieve a certain display effect. The current large-screen LCD monitors usually use more than four lamps. The light tubes are arranged in parallel on the screen. Although a large number of lamps can produce a better display effect, in fact, a lamp needs an AC-DC voltage converter to drive, and an AC-DC voltage converter also needs a transformer to cooperate, so the lamp The more the number of tubes, the more the number of voltage converters and transformers, and the size of the corresponding display must also increase. In addition to the increase in product cost, the requirement of thinning cannot be achieved.

Utility model content

The purpose of the utility model is to provide a background light transformer with an external U-shaped closed magnetic circuit transformer structure, which can simultaneously drive one, two or four luminous tubes to emit light with the advantages of small size and dual channels.

In order to achieve the above object, the utility model adopts the following technical solutions:

External U-shaped closed magnetic circuit transformer structure, which includes a magnetic core, rubber core, insulating cover, insulated copper wire, and insulating tape. It is characterized in that there is one or two primary windings in the middle, and a secondary winding on each side of the primary winding level winding.

A U-shaped magnetic core is placed outside the primary winding.

In the external U-shaped closed magnetic circuit transformer structure of the utility model, there is a secondary winding on both sides of the primary. A U-shaped magnetic core is placed on the outside of the primary wire package, which is connected with the central column magnetic core to form a closed primary magnetic circuit. At this time, the secondary side on both sides simultaneously obtains a higher leakage inductance, which is 3 to 5 times higher than that of existing products. An ideal leakage inductance can be obtained without setting an empty slot. If the size of the U-shaped magnetic core is adjusted, the size of the secondary leakage inductance can be adjusted, which reduces the space it occupies and improves application flexibility.

Description of drawings:

Fig. 1 is a structural diagram of the utility model.

Detailed ways

As shown in Figure 1, the external U-shaped closed magnetic circuit transformer structure includes a magnetic core 1 and a rubber core 2. There is a primary winding 3 in the middle of the rubber core, and a secondary winding 4 on both sides of the primary winding 3. A U-shaped magnetic core 1 is placed outside the primary winding 4 .

Claims (2)

1. An external U-shaped closed magnetic circuit transformer structure, which includes a magnetic core, a rubber core, and an insulating tape. It is characterized in that: one or two primary windings are arranged in the middle of the rubber core, and there is a secondary winding on each side of the primary winding. winding. 2. The external U-shaped closed magnetic circuit transformer structure according to claim 1, wherein a U-shaped magnetic core is placed outside the primary winding.