HUT53729A - Coil with laminated core of oriented structure - Google Patents

Abstract

A coil with a magnetic core made from grain-oriented iron sheets contains at least one coil (2). Said core consists of a blocking core (3) and a sheet metal core (1) which carries the coil(s) (2) and contains iron sheets arranged perpendicular or approximately perpendicular to the iron sheets of the blocking core (3). An insulating layer (6) is provided between the stack of metal sheets in the sheet metal core (1) and that of the blocking core (3).

Description

The present invention relates to an iron core coil with a needle plate core having a core core having at least one coil, wherein the core core is comprised of a sealing iron core and the coil bearing plate iron core.

Iron-core coils are widely used in transformers and chokes in low-frequency electromagnetic fields. A common feature of transformers and chokes is that eddy current losses in the iron core are reduced.

For its purpose, its plates are made of transformer plates. The iron core often consists of two parts, which define the plate core carrying the winding (s) and the iron core which also closes the plates, for example, as components of two rotating E-shaped elements. These transformer plates are arranged parallel to each other in a directed structure, generally leaving as little clearance as possible between them.

, The iron core is used to carry one or more rolls. The function of the transformer and the choke coil is different. As far as possible, the transformers aim for a relatively low magnetization current and, as a result, a low reactive power, which requires a minimum air gap. In the case of chokes, however, the air gap is formed in the knowledge that the magnetic energy that can be stored can be increased by the size of the air gap. For example, DE-A1 1 946 885 discloses an iron core coil in which the air gap is usually filled with a solid insulating material, thereby ensuring the physical structure of the arrangement for a long time against any change. In both types of iron coils, they are essentially focused on reducing copper loss and minimizing iron loss.

With the spread of gas discharge tubes, and especially fluorescent tubes, in recent decades, many variants of iron core chokes have been developed, each of which is characterized by the fact that the respective chokes are always made with the same geometry and the same number of turns. Usually, target machines are created for this. For example, the aforementioned publication discloses an insulating insert which can fill an air gap of a certain size and shape. This category includes, inter alia, AT-B 318 102 l. A throttle coil of the type described in the Austrian patent, which is formed by two partial coils.

It follows from the foregoing that whenever new types of gas discharge lamps are being developed, a new type of choke coil must always be designed, so that the production lines for the production of choke coils must be redesigned for each new type of gas discharge lamp; need to be re-tooled, which entails significant costs. This, in turn, entails the production of long series

- Preparing companies are reluctant to change gas discharge lamps, and the difficulty of making the inductors may be an obstacle to the spread of state-of-the-art high-power, low-power light sources.

An important problem with known plate arrangements of transformer and choke iron cores, especially in confined space installations, is that the iron core is intensely heated and, in many cases, requires cooling. U.S. Pat. No. 3,287,681; U.S. Pat. No. 4,101,115 discloses the possibility of making the coil from insulated conductive tape to prevent heat build-up. According to the description, this arrangement can be used essentially only in motors, the flux in the iron core is low and thus the thread voltage is low (high thread speed would be required).

The object of the present invention is to provide a transformer plate iron core arrangement which is capable of performing the conventional functions of a choke coil, but is easy to manufacture and enables the size of the iron core and coil to be aligned so that the technological capabilities of modern materials are almost fully exploited. In addition, the cooling conditions of the chokes are also to be improved.

To accomplish this object, an iron core roll is formed with a plate core comprising a directional structure of a split core made of transformer plates and at least one coil surrounding a portion of the plate core, the plate core having at least one coil covering the core and the coil (s). et bearing rolls which, according to the invention, have their coils)! the carrier roll core forming transformer plates are arranged perpendicular to the closing core core transformer plates, wherein the winding core and the closing core core are preferably separated from each other by a straight plane insulating layer and the transformer plates are arranged at their edges in contact with the insulating layer.

In the iron-core coil of the present invention, the coil preferably comprises two opposed winding sub-coils, which are preferably electrically conductive and

It is formed of a strip covered with an insulating layer.

In the case of choke coils, it is particularly advantageous to have in the iron core coil of the invention a lower barrier core arranged symmetrically with the coil core relative to the closing iron core and separated from the coil core by an additional layer of insulation.

It is a particularly advantageous advantage of the iron core coil of the present invention that each transformer plate of the coil core and the closing iron core crosses all other plates of the other core, thus providing an extremely efficient equalization (homogenization) of the magnetic flux in the iron core. The plates of the proposed construction at the core can be varied over a wide range and the optimum number of threads and size of the core sealed according to the purpose of use can be effectively selected.

DETAILED DESCRIPTION OF THE INVENTION The present invention will now be described in more detail with reference to the accompanying drawings, with reference to the accompanying drawings. In the drawing it is

Figure 1 is a perspective view of an iron core coil of the present invention, a

Figure 2 is a side view of the iron-core coil of Figure 1, a

Figure 3 is a perspective view showing an embodiment of an iron core coil according to the invention, which is particularly useful in gas discharge pipes,

Figure 4 is a side view of the iron core coil of Figure 3.

The directional plates of the present invention are formed as a core coil generally as shown in Figures 1 and 2, whereby an iron core 3 and a core 1 of transformer plates 4 are formed from abrasive iron-based, conventionally-formed transformer plates with characteristic features are joined to each other by leaving an insulating layer 6 filled with suitable material between them. The transformer plates 4 of the closing iron core 3 and the coil core 1 are arranged substantially perpendicular to one another, as can be seen in the outbreak of Figure 1. The transformer plates 4 are shown in FIG

The insulating layer 5 is reached with its edges and is surrounded by a strip 7 made of a non-ferromagnetic material, such as dia- or paramagnetic material such as aluminum, in order to maintain the spatial shape of the structure. The assembly of the transformer plates 4 of the closing iron core 3 is possible in the known manner. The iron core coil of the present invention can be mounted at supports at the installation site.

The abrasive barrier core 3 is formed by gluing a block of directional structure. The roll core 1 carries one or more rolls 2. By perpendicular arrangement of the transformer plates 4 in the coil core 1 with respect to the sealing iron core 3, which may be referred to as a cross arrangement, it is possible for the transformer plates 3 to be magnetized to saturation in the sealing iron core 3. The consequence of this is that the magnetic flux, instead of the usual change described by the type 1 / R function, assumes a substantially maximum constant value over the entire cross-sectional area. In this way, the weight of the iron material of the iron coil can be reduced by about 15 to 20% with the same electrical parameters compared to the known arrangements. In a structure consisting of transformer plates 4 arranged perpendicular to one another, the coil core 1 carries the coil (s) 2, which are preferably formed of a strip-like material. The strips are covered with an insulating layer. In such an arrangement, it is particularly advantageous to provide cooling on an area that is increased by about 25 to 35% over known arrangements. This again reduces the rate of temperature rise of the coil (s) 2 compared to the known solutions and consequently increases the current density by 10-15% at the same permissible coil temperature. With the arrangement of the invention, the available window cross-section can be filled in very well, so that the thread speed can be increased or, conversely, the same performance can be achieved with a smaller thread speed than in the known solutions. In other words, producing a coil with a given reactance requires a smaller iron cross-section than conventional transformers. As a result of all these advantages, assuming the same operating temperature, the weight of the iron core coil of the desired reactance is about 30-40% less than the known coils.

-6csökkenthető.

In gas discharge tubes, impulses containing high-frequency components present a very high risk of breakthrough in the pre-ignition switching for ignition. Therefore, when designing the coil 2, it is advisable to choose a solution that creates a symmetrical load on both sides of the threads, taking into account the scattered capacity. This can be achieved by the solution shown in Figures 3 or 4, in which a lower closing iron core 3 'is connected symmetrically to the coil core 1 with the closing iron core 3. This solution can be particularly well appreciated in practice, since in this case the installation of a light source containing a gas discharge tube does not require consideration of the high potential temperature of the gas discharge tube. The symmetry of the arrangement can be ensured by the winding direction of the coils. Thus, in the arrangement, the strength of the point most sensitive to the permeation strength can be reduced by half since the load at the point closest to the iron core is reduced by half. By using a roll of insulated conductive tape, the cooling conditions can be improved.

An additional unexpected result was found during the verification of the proposed iron-core coil, which, while solving the task set, is a significant positive. Due to its heavy weight loss, a 15 kW multi-light lamp has been manufactured in such a size that it can be carried by a single person. This is especially important in disaster situations, night rescues, fires, or in circumstances where temporary lighting is required, but it is very expensive to build a cable system. This is the case, for example, in construction sites, railway junctions, airports, etc.

Claims (5)

An iron core coil with a directional structure plate having an iron core comprising a directional structure transformer plate split iron core and at least one coil surrounding a portion of the plate core core, the plate core having a coil (s) partially overlapping the coil (s) and the coil (s). formed by a core with winding core, characterized in that the transformer plates (7) forming the winding core (1) carrying the coil (s) (2) are arranged perpendicular to the transformer plates (7) forming the closing iron core (3), the sealing iron core (3) is separated from one another by an insulating layer (6) and the transformer plates (7) are arranged in contact with the insulating layer (6) at their edges. Iron core coil according to Claim 1, characterized in that the coil (2) comprises two opposed coil windings. Iron-core coil according to Claim 1 or 2, characterized in that the coil (s) (2) are formed of an electrically conductive and insulating film. 4. Iron core coil according to one of Claims 1 to 3, characterized in that a lower closing iron core (3 ') is arranged symmetrically with the coil core (1) relative to the closing core core (3) and separated from the coil core by an additional layer of insulation. 5. Iron core coil according to one of claims 1 to 3, characterized in that the insulating layer (6) is formed in a straight plane between the coil core (1) and the closing iron core (3).