CN1186312A - Processes for winding coils of high-voltage transformers - Google Patents

Abstract

The present invention relates to a method used to wind the coil of the high-voltage transformer of a cathode ray tube. According to the present invention, a tertiary winding is winded through the local swinging movement of a leading-wire guiding device in the axial direction of a coil rack, and the leading-wire guiding device guides the leading wire to be winded on a rotating coil rack. The tertiary winding of the transformer, which is manufactured according to the present invention, is that the adjacent turns of the winding is overlapped mutually, so that more turns can be winded on a coil with the same length. Therefore, the transformer of the present invention comprises less diode 10 and less intermediate insulation layers 24, which are arranged between the windings of the tertiary winding. The electromagnetic coupling property is well maintained. With the method of the present invention, the favorable repetition of the product can be obtained.

Description

The method of winding coils of high-voltage transformers

The invention belongs to the technical field of the winding method of coils of high-voltage transformers, this high-tension transformer provides high pressure in particular for the grid for the cathode ray tube of monitor (display) or television set.

From the angle of manufacturing technology, this transformer can be divided into two main kinds, i.e. locellus type (chamber-type) transformer and laminated devices (layered) transformer.The transformer of these two kinds includes a ferromagnetic magnetic circuit and centers on the primary and secondary winding of at least a portion coiling of this magnetic circuit.In locellus type transformer, the primary and secondary winding is an electrically insulated from one another, because they are housed inside respectively in the primary and secondary room of being isolated by insulating barrier.These rooms distribute along an axis of magnetic circuit.In the laminated devices transformer, the primary and secondary winding is to fix around the part of magnetic circuit with the form of concentric and coaxial layer.Transformer according to the present invention belongs to back one kind, i.e. laminated devices transformer.The widely known and existing description in multiple publication of this transformer.The patent application GB 2298318-A of the applicant's French Patent (FRP) FR2726686 or Murata can quote the example as these publications as proof.

A kind of exploded view of known layering transformer has been shown among Fig. 1, will be described in detail this transformer below.

This high-tension transformer 100 shown in Fig. 1 is used to the power supply of cathode ray tube (not shown).It comprises one first bobbin 1, and this bobbin is around a (not shown) unshakable in one's determination of being made by ferrimagnet, and the overall primary and secondary winding with reference number 2 expressions of this bobbin carrying.One is called as the winding of third level winding 4 by second bobbin carrying of reference number 3 expression, and it is for they and secondary winding that bobbin 1 carries are distinguished that these windings are called third level winding.This second bobbin carrying is used to the high pressure winding of the grid power supply of cathode ray tube just.These two bobbins 1 and 3 are in rigging position concentrically with respect to one another, and first bobbin 1 is positioned at third level winding coil frame 3 inside.These two bobbins and unshakable in one's determination being used for are contained in a housing 5 together around the part that bobbin 1 and 3 are installed, and this housing is normally made by insulating plastics material.This housing 5 comprises two high pressure output lead posts, and by reference number 6 and 7 expressions, first output 6 is used to provide anode high voltage respectively for they, and second output 7 is used to provide the focusing high pressure.The latter may adjust by a current potential (adjustment) parts 8, and these parts are installed on the open surface 9 of insulation shell 5 in detachable mode.

To notice that also second bobbin 3 carries diode 10.These diodes 10 are used to connect to form the termination of the winding of third level winding, as below in conjunction with as described in Fig. 2.

This figure is a circuit connection diagram, in its presentation graphs 1 with each the winding annexation shown in the physical form.Nature, the circuit diagram of Fig. 2 only provides by way of example, and it has multiple also known version.The elementary winding of this transformer is made of winding 11, and winding 11 is connected and is denoted as between 1 and 2 the contact P.During contact outside relating to reference number, reference numerals is enclosed in Fig. 2 and is drawn.This elementary winding 11 is crossed over the magnetic circuit of being represented by two vertical lines 30 and is coupled to a plurality of secondary winding in Fig. 2, these secondary winding are called as auxiliary secondary winding and high voltage secondary winding, because the former produces boost voltage, the latter produces cathode ray tube required high pressure of when work.Auxiliary secondary winding is represented by reference number 12-15 in Fig. 2.Be connected winding 12 between the contact 3,4 and be used to produce the burning voltage of 4V (volt).Winding 13,14 and 15 is used for producing respectively voltage and the heater voltage of 40V, 14V, and heater voltage is used for the negative electrode of heated cathode ray tube.In fact, winding 11-15 is around first bobbin 1 location, they together in the pie graph 1 by the primary and secondary winding of reference number 2 expressions.

The winding that the high voltage secondary winding is represented for reference number 16-18.First termination 19 of first winding 16 is by contact 7 ground connection of this transformer.Second termination 20 of winding 16 is connected to first termination 21 of second winding 17 by a diode 10.Second termination 22 of this winding 17 is connected to the tertiary winding 18 of third level winding 4 by second diode 10.For clarity sake, the circuit diagram of Fig. 2 is confined to three windings by 10 interconnection of two intermediate diode, also only expresses three intermediate diode 10 equally in Fig. 1.But those of ordinary skill in the art is well known that the quantity of these windings is more, and third level winding generally includes 5-7 diode.For example, these diodes have been shown in the Figure of abstract of the GB2298318-A that has been cited.Focus voltage is expressed as the voltage that picked out in 21 minutes from first termination of second winding 17 of third level winding.These voltages are used to the grid G 2 and the power supply of those focusing electrodes of cathode ray tube after adjusting through current potential (adjustment) parts 8.At last, between the contact 1 and 2 of elementary winding 11, show an example of the circuit of powering, will this circuit be described at this into the elementary winding of this transformer 100.In addition, also show the load circuit example that is located at respectively between the contact 3,4 and 6,8 of assisting winding 12 and 13.

Third level winding has been shown according to the state of known manner actual installation on bobbin 3 among Fig. 3.This figure schematically shows the axial cross section of bobbin 3, so that demonstrate the winding by this bobbin carrying.The cross section that centers on the lead of bobbin 3 windings is represented with stain 23.Lead twines in solid matter (adjoining turns) mode.This means that in winding process, the pitch that every winding one circle lead advances equals the diameter of section of lead.This pitch is to obtain by program control is carried out in the motion of the wire guides (wire-guide) that almost is parallel to coil axis according to known mode.Wire guides makes lead be substantially perpendicular to the axis of coil.A large amount of if desired circle (circle) number, the length of bobbin 3 must equal the product of the diameter of the used lead of the number of turn and coiling.This causes bobbin length inharmonious with the assembly fixture that is used for transformer is inserted power supply.In order to satisfy undersized restriction, known method is that a plurality of winding layers are stacked mutually.Each winding layers separates by a heat insulating lamella 24 and adjacent layer.Each termination of a winding is connected to an end of the winding of continued access by a diode 10, then the voltage of each winding termination add together, thereby obtain the high pressure of the required 30kV magnitude of the anode voltage of cathode ray tube for example.Only show two winding layers in Fig. 3, these two winding layers are linked together by a diode 10 and are insulated from each other by an insulating barrier 24.Yet, very clear, pointed out that as top such transformer generally includes the 6-8 layer, therefore the separator 24 of 5-7 diode 10 and as much is arranged.

Because its concentric layering fit presents good electromagnetic performance such as this laminated devices transformer of just having described, especially its little leakage inductance.The interference of the stray capacitance between each layer is very little.Owing to these reasons, they are visible interference signal on the screen of cathode ray tube not.On the other hand, because the quantity of its canoe and diode, they are compared with locellus type transformer is comparatively expensive.Locellus type transformer is more cheap, because their coilings are easy, and can automatically carry out coiling.Its stray capacitance is low.On the other hand, because reasons in structure, they have bigger magnetic leakage, and this can show as the interference that visible being called as " beat " on screen.

In order to reduce size and to reduce the number of plies.Japanese patent application JP 59041811 has proposed a kind of like this scheme: carry out coiling by means of a kind of wire guides, and wire guides twine the diameter of the pitch of a circle corresponding to lead around bobbin less than lead.As described in this patent application, the feasible winding that might obtain a kind of compactness of this winding method, this winding has less number of diodes and allows easily to adjust output contact, and this contact is used to export the intermediate voltage such as focus voltage.But there is certain accidentalia in this method, takes measures to keep as described in this patent application the wire guides also can be like this with respect to the angle and distance of the axis of bobbin even resemble.The measure of being taked is to adopt a kind of resin coating lead, and this resin hardens under action of ultraviolet ray, to prevent being scattered of stacked winding.But this measure can not alleviate this accidental effect, has increased cost on the contrary, makes manufacturing process complicated, and has increased winding thickness.Because accidentalia still exists, the transformer on production line is not necessarily mutually the same really, and also not necessarily with to estimate the sample that product uses identical really.

The objective of the invention is to make in recursive mode the transformer of laminated devices, the manufacturing cost of this transformer is lower than known laminated devices transformer, and presents better electromagnetic property, disturbs so that be not aware of " beating " on screen.

According to the present invention, this purpose is so to make (winding) layer by the mode with a kind of control to realize, that is, for identical diameter of wire and identical bobbin length, each layer comprises the more number of turn.In such a way, the number of plies be can reduce, and therefore the quantity of diode and the quantity of the intermediate insulating layer between each layer reduced.For this reason, the inventor has designed a kind of like this winding method, that is, the past by in winding process, giving a kind of part of wire guides backward and then from after forward swing type move each layer of coiling.A plurality of adjacent turn are stacked mutually in such a manner, and are promptly good as if unordered intuitively, but in fact are in check, and the inventor is referred to as " unrestrained the putting of pine " [being called " en vrac range " in the French].Because a plurality of adjacent turn is stacked, the number of turn of each layer is more, and this has just had above-mentioned advantage.

Briefly say, the present invention relates to a kind of method that is used to make high-tension transformer, described transformer comprises lead winding (wrapping wire wire winding), elementary winding and the winding that is used to produce high pressure, each of these windings includes two terminations, i.e. first and second terminations, the winding that is used to produce high pressure is to locate in the mode of stacked mutually concentric layer, each the preceding the layer all by an electrical insulation material layer with one after layer isolation, one after an end of winding be connected to an end of winding the preceding by a diode, in the method, be used to produce the winding of high pressure by making around bobbin of an axis rotation, wait that the lead of making winding guided by a wire guides, this wire guides makes lead be substantially perpendicular to the rotation of bobbin, this wire guides can move on the direction of the rotation that is parallel to bobbin, the distance that every this wire guides of winding one circle is advanced equals the diameter of lead, the method is characterized in that, for at least one winding that is used to produce high pressure, wire guides has a kind of motion of the direction of the rotation that is parallel to bobbin, and this motion is local swing mode (locally oscillatory).

Local swing mode is interpreted as being meant a kind of motion, in this manner, along the axial wire guides of advancing to the other end of bobbin, carry out this motion in the mode that periodically commutates with respect to its direction of advancing to the other end from an end of bobbin from an end of bobbin.

To describe the present invention by accompanying drawing below, Fig. 1 in the accompanying drawing-3 (being described) represents respectively:

Fig. 1 is the exploded perspective view according to the critical piece of a kind of transformer of prior art;

Fig. 2 is the circuit diagram of annexation that shows each winding of transformer;

Fig. 3 is the axial cutaway view of a bobbin of prior art, and this bobbin carrying is used for producing the winding of high pressure and the laminated devices transformer of will packing into.

Fig. 4 is the axial cutaway view according to a bobbin of the present invention, and this bobbin carrying is used for producing the transformer of the winding of high pressure and the manufacturing of will packing into.

Should be pointed out that at first the present invention only relates to the winding method of the winding that is used to produce high pressure.Therefore, be prior art though Fig. 1 and 2 represents, they have also represented the structure and the electrical connection of transformer made according to the method for the present invention.

Fig. 4 schematically shows the axial cross section of a bobbin 3, and this bobbin carrying is used to produce the winding of high pressure.Compare with Fig. 3, as can be seen, the novel features that the present invention introduces relates to the arrangement architecture of coiling winding.The stacked mutually fact of adjacent turn makes and might obtain bigger winding thickness.To clearly set forth the implication of adjacent turn below.One circle just is meant such section lead, and the length of this section lead equals the girth of coil in fact, and lead is wrapped in from coil.One circle may be adjacent with another circle, because it is axially very near another circle.But, may be to form by long lead only by the lead winding that is separated from each other at two adjacent circles of this first direction (sence).In present patent application, be said to be two adjacent circles and not only be meant their little axial distances that separates each other, and be meant that the distance of the lead of the termination of separating this two circle is little, for example and set the order of magnitude less than 20 times of coil girths.This means that the commutation of wire guides will be restricted to the corresponding 20 times of diameters of wire of each commutation.Thus, Fig. 4 illustrates three sub-conductor layers, and three sub-conductor layers form a layer together, and this layer is isolated by a heat insulating lamella 24 and adjacent layer.In prior art, an end 20 that forms the lead of a winding is connected to an end 21 of the lead that forms adjacent winding by a diode 10.But for the coil of an equal length, because each winding comprises the more number of turn, so the number of plies can reduce, and makes and can correspondingly reduce the quantity of intermediate insulation thin slice 24 and the quantity of diode 10.Can obtain transformer 100 thus than low cost.The test that the applicant did has shown that so the transformer that obtains can not present " beating " that any eyes can be awared on the screen of cathode ray tube, and product is that quality is uniform.

Claims (2)

1. method that is used to make high-tension transformer (100), described transformer comprises the lead winding, elementary winding and the winding (16 that is used to produce high pressure, 17,18), each of these windings includes two terminations, i.e. first and second terminations, the winding that is used to produce high pressure is to locate in the mode of stacked mutually concentric layer, except last one deck, each the preceding layer all by an electrical insulation material layer (24) with one after layer isolation, one after an end of winding be connected to an end of winding the preceding by a diode, in the method, be used to produce the winding of high pressure by making around an axis bobbin of rotation (3), wait that the lead of making winding guided by a wire guides, this wire guides makes lead be substantially perpendicular to the rotation of bobbin, this wire guides can move on the direction of the rotation that is parallel to bobbin, the distance that every this wire guides of winding one circle is advanced equals the diameter of lead, the method is characterized in that, for at least one winding that is used to produce high pressure, wire guides has a kind of motion of the direction of the rotation that is parallel to bobbin, this motion is local swing mode (locally oscillatory), so that the mutual stacked and made winding of adjacent turn comprises a plurality of stacked conductor layers mutually.

2. the television set or the monitor of the transformer of making according to the method for claim 1 are installed.

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