CN86203243U - Transformer with several glued magnetic cores - Google Patents

Abstract

The utility model discloses a transformer with magnetic cores, and the magnetic cores are formed by agglutinating a plurality of U-shaped, etc. Magnetic cores by agglomerant and are provided with magnetic circuits whose shape is like Chinese character 'kou'. The pins of the magnetic cores are inserted into a coil frame, and the coil frame and the surrounding space are filled with synthetic resin; when the synthetic resin is contracted caused by temperature change, force which is big enough to cause the magnetic cores to be damaged and presses on the portion of the pins of the magnetic cores is not existed. In the first implement instance, the elastic agglomerant is used; the force which presses on the portion of the pins of the magnetic cores is absorbed by the elastic agglomerant because of the elastic deformation of the elastic agglomerant. In the second implement instance, the utility model is provided with at least one junction portion, and the junction side does not have the agglomerant to spill over. A gap is arranged between the surrounding portion of the pins and the inner circumference of the winding frame, which prevents the force transferring onto the portion of the pins.

Description

Transformer with several glued magnetic cores

The present invention relates to device for transformer, particularly can be as the device for transformer of the kickback transformer of television receiver etc.

Technical background

In many technical fields, when just the cathode ray tube that uses in multiple machine (picture tube) is worked, must add high voltage, as this high-tension generation circuit, usually all be to use in the past and took back the circuit of sweeping transformer, yet, in recent years, along with the popularizing of the machine of so-called new media, begin more and more as the various display unit of the conversion equipment of people one machine system with cathode ray tube.On the other hand, in nearest color TV set, AV(audio frequency, video) corresponding machine becomes very universal, in order to adapt to the broadcasting multiple character, in order to adapt to the terminal equipment that personal computer is used, also in order to adapt to a large amount of productions of popular display, every field such as satellite broadcasting become more and more higher to the requirement of quality.

And, high voltage has very big influence to the image quality that shows on cathode ray tube, in kickback transformer, also obtain low-voltage output as one of main building block of high voltage generating circuit, the ring composition stack amount that contains in this low-voltage is little, this ring composition stack amount produces at the high pressure input coil, for ュ-Le De シ セ-シization, hope can be insulated between primary voltage side and secondary voltage side simultaneously.According to this requirement, the applicant once recommended picture at clear 57-194067 number Japanese patent application (denomination of invention " kickback transformer ", the spy opens clear 59-84408 number) and the kickback transformer shown in the clear 60-11831 Japanese utility model application (name of design " kickback transformer ") in the past.

This kickback transformer is taked to be bonded together such structure with two U types of binding agent magnetic core always, when carrying keeping and using, when temperature on every side drops to below-15 ℃, synthetic resin around the U type magnetic core just shrinks, U type magnetic core is produced an active force, therefore often cause the breakage of U type magnetic core.For preventing that magnetic core from producing above-mentioned such breakage, the applicant once attempted using the flexible binding agent (FP-138 of セ ソ ダ イ Application society system, the EP-570(trade name) etc.) come U type magnetic core is bonded together, this flexible binding agent is that interpolation increases and scratches agent and make in the binding agent of the one-component epoxy resin series of good manufacturability.Yet, because actual serviceability temperature can be also lower than the initial temperature that makes the magnetic core breakage, so in reality is used necessary temperature range (-45 ℃～130 ℃ scopes approximately), can not avoid damaged fully.Promptly not only do not solve substantive issue with such binding agent, and at the temperature height, during high humidity, bonding very difficulty bonding plane has appearred has thrown off such new problem, does not obviously have practical value.

Therefore strong hope in use, also comprise environmental condition conveying, when keeping, necessary (temperature-45 ℃～130 ℃ of scopes, relative humidity is below 95%) under, magnetic core is injury-free, and wish especially to select to guarantee its adhesive performance binding agent without a doubt in use, and improve the bonding of magnetic core and the structure of fixing means and bonding portion.

The purpose of this invention is to provide a kind of high-quality device for transformer, even particularly carry under cryogenic conditions, when keeping and use, magnetic core also can be damaged.

For reaching this purpose, a plurality of magnetic cores, when for example two U type magnetic cores are bonded together, in one embodiment of the invention, because use the binding agent that suitable elasticity and bonding force are arranged, the power that adds to magnetic core absorbs by strain, has played the effect that prevents the magnetic core breakage.

In addition, in other embodiments, to a plurality of magnetic cores, one in two junction surfaces of two U type magnetic cores for example, binding agent is not overflowed from this adhesive surface, the pin of this joint portion magnetic core part is injected coil rack by the gap of being left, direct thereby magnetic core pin part is not born near a joint portion from power on every side, played the damaged effect that prevents.

The simple declaration of accompanying drawing

Figure 1A illustrates the cutaway view of an embodiment of device for transformer of the present invention.

Figure 1B is the profile from the B-B line incision of Figure 1A.

Fig. 2 is the figure of explanation magnetic core heat resistant test.

Fig. 3 is the inductance temperature characteristics figure of the transformer of Figure 1A.

Fig. 4 A illustrates the cutaway view of other embodiment of device for transformer of the present invention.

Fig. 4 B is the profile from the B-B line incision of Fig. 4 A.

Fig. 5 is the inductance temperature characteristics figure of the transformer of Fig. 4 A.

Fig. 6 A is the applicant device for transformer figure of suggestion in the past.

Fig. 6 B is the Transformer Winding winding diagram of Fig. 6 A.

Fig. 6 C is the profile that cuts from Fig. 6 AC-C line.

Fig. 7 A and Fig. 7 B are the figure of explanation magnetic core breakage.

To be expression apply state diagram after the impact to single U type magnetic core for Fig. 8 A and Fig. 8 B.

Detailed description of the invention

Before the explanation embodiments of the invention, for understanding the present invention better, at first the structure to the kickback transformer in the said old patent describes.

Fig. 6 A and Fig. 6 B represent the applicant cutaway view and the winding connection figure of the kickback transformer of suggestion in the past respectively.In same figure, one group of U type magnetic core 1 _a1 _bCombine and be formed with the magnetic core 1 of " mouth " font magnetic circuit.And magnetic core 1 has two pin parts, and the first is used for low pressure input coil (primary winding), this coil on skeleton 6 and its two be to be used for low pressure output winding (tertiary coil), this coil is on skeleton 11, at binding post plug 13 _a, 13 _bAnd binding post plug 14 _a, 14 _bBeyond is respectively at opposed 15 _a, 15 _bThe place engages, and the jack 4 of a pin insertion that can make magnetic core is arranged on the skeleton 6, and the jack 5 of another pin insertion that can make magnetic core is arranged on the skeleton 11, and high-voltage output line circle (secondary coil) skeleton 7 is contained in the outside of low pressure input coil skeleton 6.

Low pressure input coil (primary winding) skeleton 12 is contained in the outside of above-mentioned low pressure output winding skeleton 11, the low pressure input coil 8 on the above-mentioned low pressure input coil skeleton 6 _aWith the low pressure input coil 8 on low pressure input coil skeleton 12 _b, as Fig. 1 _BShown in be connected in parallel.High-voltage output line circle 10 is on high-voltage output line ring framework 7, and low pressure input coil 9 is on low pressure output winding skeleton 11.

In addition, give earlier the high-voltage output line circle 10 on high-voltage output line ring framework 7 around the home, its head end and end are respectively facing to connected binding post plug 16 _a, 16 _b,, this voltage multiplying rectifier assembly 17 is contained on the skeleton 7 for connecting voltage multiplying rectifier assembly 17.

Low pressure input coil skeleton 6 and low pressure output winding skeleton 11 corresponding each binding post plugs 13 _a, 13 _b, 14 _a, 14 _bThe end of that side and opposite side is injected the jack that is arranged on the shell 20 respectively, is inserted into eliminator 18,19 always and touches mutually, and above-mentioned two skeletons are installed on the shell 20 like this.The 21st, electrical apparatus insulation injection moldings such as epoxy resin resin, in manufacture process, behind shell 20 that low pressure input coil skeleton 6 and low pressure output winding skeleton 11 are packed into, when decompression 10mmHg mercury column, make it in shell 20, be injected into the represented position of L, make it be subjected to thermmohardening with hot-blast stove etc. then, just obtained the assembly of kickback transformer winding.

In order to reduce cost and to make it miniaturization and, need not assemble magnetic core metal fittings and screw rod etc., one group of U type magnetic core 1 _a, 1 _bInsertion is arranged on the magnetic core jack 4,5 on the winding spare 24, the epoxy resin of the one-component (seal-108 of セ ソ ダ イ Application society system, etc. seal-128(trade name)) nonmagnetic wire gap liner 2(JISC3103 type such as binding agent 3 and hard copper wire is used for around unannealed annealed copper wire of other motor etc.) be clipped in the interface, with above-mentioned state two U type magnetic cores are docking together, from the both sides pressurization, heat on one side on one side.This just makes binding agent 3 sclerosis, thereby is formed with the magnetic core 1 of " mouth " font magnetic circuit, and magnetic core 1 is fixed on the jack 4,5.

In winding assembly 24, as seen from the figure, the external diameter on the left side is done greatly than the external diameter on the right.

The 22nd, high-voltage resistant lead, the 23rd, prevent the sleeve that insulating resin 21 leaks.

H in Fig. 6 B _TBe the high pressure output wiring terminal of high pressure output lead 22 in succession, E is a binding post of receiving automatic brightness limiter circuit or ground wire, 8 _cBe power-line terminal, 8 _dBe to receive horizontal deflection output transistor T _rThe binding post of rectifier.

So, structure like this, the low-temperature condition about to-15 ℃ is subjected to the power that member produces around the magnetic core, and magnetic core will be damaged, and when particularly transportation in the winter time, keeping and low temperature used, temperature was low more, and damaged ratio is just big more.

Be shown near the gap liner 2 of winding assembly 24 of Fig. 6 A cross section (C-C cross section), use Fig. 6 _cRepresent, the damaged situation of magnetic core is described with this figure.When in case temperature slowly descends now, at same Fig. 6 _cIn, use n ₁, n ₂, n ₃Shown in the part size also slowly diminish.Little (coefficient of linear expansion of epoxy resin is 4.1 * 10 because the ratio of magnetic core change in size is than the ratio of this size decreases ^-5/ ℃, the coefficient of linear expansion 8.5 * 10 of magnetic core ^-6/ ℃ about) in Fig. 7 A, use arrow F ₁, F ₂, F ₃, F ₄The masterpiece of expression is used magnetic core 1 _a, 1 _bThe bonding part, dot the distortion of magnetic core 1.

The size of this power, different and different with the thickness of each several part casting resin, thick local convergent force is strong, and F is arranged ₁＞F ₂-F ₃＞F ₄Relation.Here it is causes 25,25 of magnetic core 1 ' part to produce damage reasons.And, shown in Fig. 7 B, at power F ₁The direction that increases is coated with the face length of binding agent, power F ₂When the direction that increases was coated with the face weak point of binding agent, the mutual generation of certain or 25,25 ' part and 26, the 26 ' part of 26,26 ' part was damaged.This is considered to power F ₁Greatly, magnetic core 1 is unable to bear so big pressure.

25,25 ', 26,26 ' damaged form and only magnetic core 1 _bInstall on the platform of mensuration with Fig. 8 A, similar during the afterburning F of the method shown in Fig. 8 B in the situation of the breakage of 27,28 parts, show that above-mentioned deduction is correct.

Below the present invention will be described

Figure 1A, Figure 1B represent the cutaway view of one embodiment of the present of invention respectively and by the profile of B-B line cutting, with among the figure and Fig. 6 A～Fig. 6 _cIdentical component part gives same numbering, and is not elsewhere specified.

One group of U type magnetic core 1 _a, 1 _bInserted jack at 4,5 o'clock, at the magnetic core interface 40 of jack 4 those sides ₁ Magnetic core interface 40 with jack 5 those sides ₂On, when pressurizeing from both sides, bonding agent is from interface 40 ₁, 40 ₂Overflow, be coated with to apply and make interface 40 ₁, 40 ₂The binding agent 29 of the rubber series such as a certain amount of viscous fluid silicon rubber of core plan in addition and winding assembly 24 bondings (TSE32 of the シ ソ コ of Toshiba-Application society system * * the KE-4nRTV シ ソ-ズ (trade name) of chemical industry society of シ ソ-ズ (trade name) SHIN-ETSU HANTOTAI system), and, accompany betwixt under the state of gap liner 2, make interface 40 ₁, 40 ₂To tightly, on one side from the both sides pressurization,, and in ambient temperature and moisture, place for a long time on one side with the hot-blast stove heating, according to the characteristic of binding agent, make it sclerosis with corresponding method, just obtain the device for transformer of first embodiment of the invention.In first embodiment, jack 4,5 and magnetic core 1 _a, 1 _bBetween the part in space be filled with binding agent 29, but also can be filling binding agent 29 in the jack 5 entirely with.

In the serviceability temperature scope that comprises the conveying of binding agent, keeping (45 ℃～130 ℃), when not reaching the breakdown strength of magnetic core, the magnetic core distortion.Here said breakdown strength, different and different with the size of magnetic core, but be 20kg/cm to general kickback transformer ²About.

In addition magnetic core jack internal diameter is decided to be 15.5mm, the magnetic core external diameter is 15mm, when the diameter of gap liner 2 is decided to be 0.4mm, above-mentioned TSE32 * * シ ソ-ズ (trade name) type binding agent 29 coating 0.2～0.25g about, on one side magnetic core 1 _a, 1 _bClamp from both sides with resilient belt, with about 120 ℃ hot-blast stove heat 1.5 hour or more on one side, the device for transformer of above-mentioned first embodiment of enough adhesion strengths just can be obtained.

The device for transformer of said structure, as shown in Figure 2, after placing 24 hours under about-50 ℃ of conditions, move to immediately and placed again under about 100 ℃ condition 24 hours, this calls one-period, and same test is repeated 10 cycles, and magnetic core 1 has no breakage.

Why good like this effect is arranged, and is that tensile strength is 34kg/cm because rubber hardness (Durometer A hardness) is 44 in JISA method (JISR6301) ², elongation is 240%, and soft, and intensity is good, this just makes TSE32 * X シ ソ-ズ (trade name) type binding agent 29 not lose elasticity from the high temperature more than the low temperature to 150 below-50 ℃ ℃, and, become behind the low temperature and use n among Figure 1B ₁, n ₂, n ₃The size of representative is once the distortion that diminishes, and this just makes Fig. 8 A, and the power F shown in the 8B can not be increased to the degree above the magnetic core breakdown strength.Point out that in passing when magnetic core was subjected to power F shown in Fig. 8 A, least solid, breaking strength at this moment was about 15-20kg/cm ²About.Also have, the U type magnetic core pin section diameter of doing intensity test usefulness is about 15mm, the about 40～50mm of total length, and the thickness of pin portion spaced-apart beams is about 12mm, the about 13mm of length.

The numerical value of the Durometer A hardness (JISA method) of the silicon rubber binding agent that can use as binding agent 29 is shown below:

TSE－322…………44

TSE－3251…………16

KE－40……………50

KE－1204…………15

And, when using epoxy resin in the past always, Shore D (JISD method=JISK6911) is following numerical value:

EP－570…………78

EP－138…………60

Moreover having is enough to bear the mechanical adhesion of the shock and vibration that apply in transit intensity.If according to experiment, when two U type magnetic cores are bondd with silicon rubber binding agent TSE-322, the about 60kg/cm of the maximum tensile strength ², because the coefficient of linear expansion of stick 29 is 2.1 * 10 ^-4/ ℃ bigger than metal, because of the influence of the interval variation of gap liner 2, high-temperature time crack liner 2 becomes greatly gradually, and the inductance rate of change can think almost during high temperature that inductance is indeclinable, with magnetic core variation of temperature relation as shown in Figure 3 with Fig. 6 A-Fig. 6 _cShown product is compared, and has to change little such advantage when high temperature.In the above-described embodiments, be to use one group of pin that the long short asymmetric U type magnetic core that has is partly arranged, also can use the U type magnetic core of the same symmetry of one group of pin partial-length, can also be by U type magnetic core and " I " font magnetic core, or synthetic " mouth " font magnetic core of a plurality of " I " font magnetic core set constitutes.

The time that above-mentioned KE-4RTV シ ソ-ズ (trade name) is also at room temperature placed than length as binding agent can obtain same result.

According to the device for transformer of first embodiment,, can absorb the power that imposes on magnetic core because binding agent can be out of shape in the serviceability temperature scope.Just can prevent the magnetic core breakage, when particularly using fluid silicone rubber as binding agent, because under the ambient temperature below-50 ℃, its elasticity is not lost yet, do not descend in cohesive force more than 150 ℃ yet, just make the scope of application become very wide, thereby can adopt the cheap land route transportation resources such as Scibilia railway of freight charges in the winter time, freight charges are reduced greatly.During with resilient binding agent,, absorb vibration, when being used in pulse transformer,, can also prevent the breakage that causes by impact not producing vibratory murmur between magnetic core and between magnetic core and winding assembly because can alleviate impact with this bonding agent.In addition, when making binding agent, at room temperature also can harden, so even also can process in the place that does not have hot-blast stove and baking oven with viscous fluid silicon rubber.And because viscous fluid silicon rubber is littler than the binding agent toxicity of epoxy resin series, so safe in utilization, meet industrial hygiene.And then with non magnetic thread during as the gap liner, the viscous fluid silicon rubber that service precision is higher can obtain the little gap length accurately of deviation, also because the gap liner is that line contacts with core plan, just make bonding agent and core plan that enough contacts area are arranged, can obtain firm bonding.And if use the hard copper silk to make the gap liner, not only the precision height also has advantages such as low price.

Fig. 4 A, Fig. 4 B illustrates other embodiments of the invention, itself and Figure 1A, the part that Figure 1B is identical is not elsewhere specified.When one group of U type magnetic core 1 _a, 1 _bInsert magnetic core jack 4,5 o'clock simple substance epoxy resin series binding agent 29 ₁(the system EP-128 of セ ソ ダ イ Application society, EP-108(trade name)), be coated to jack 4 magnetic core interface 40 over there ₁On, when pressurizeing from both sides, binding agent is not from interface 40 ₁Overflow for degree, on the other hand the binding agent 29 of simple substance epoxy resin series ₂(EP-128, the EP-108(trade name of セ ソ ダ イ Application society system) etc.) be coated to jack 5 magnetic core interface 40 over there ₂On, binding agent is from interface 40 when pressurizeing from both sides ₂The amount of overflowing just in time can be seam 40 ₂Core plan in addition and winding assembly 24 are bonded together and are degree, then respectively at interface 40 ₁, 40 ₂In folder go up gap liner 2, to tightly,,, make binding agent 29 then on one side with heating such as hot-blast stoves on one side from the both sides pressurization ₁, 29 ₂Harden, just obtain the device for transformer of second embodiment of the invention.

At this, the internal diameter of magnetic core jack 4,5 is decided to be 15.5mm, the external diameter of magnetic core 1 is decided to be 15mm, when the diameter of gap liner is decided to be 0.4mm, the binding agent 29 about coating 0.1g ₁, the binding agent 29 about coating 0.2～0.3g ₂, on one side from both sides magnetic core 1 _a, 1 _bClamp with resilient belt,, just can obtain having the device for transformer of above-mentioned second embodiment of enough adhesive strengths on one side with about 110-120 ℃ hot-blast stove heating more than one hour.

The device for transformer of making by last method moved under 100 ℃ of temperature after placing 24 hours under-50 ℃ the temperature as shown in Figure 2 at once put 24 hours again as one-period, so test 10 more than the cycle, magnetic core 1 still has no breakage.

So it has so good effect, even be because of n in Fig. 4 B ₁, n ₂, n ₃Shown in the size decreases of part because at magnetic core 1 _a, 1 _bAnd have gap portion between the inwall of jack 4, cause power F shown in Figure 7 ₁, F ₂, F ₃, F ₄Almost directly do not add to magnetic core 1, and, be not subjected to F fully at jack 4 over there because a pin of a magnetic core 1, does not bond together with winding assembly 24 ₂, F ₃, F ₄Influence.And then to power F ₁, n ₂The change in size of part is big, even magnetic core 1 is subjected to some power, because the surface of jack inwall and magnetic core pin is that face contacts, at Fig. 8 A, the power of that pointed aspect does not increase among Fig. 8 B, and the beaming resistance limit intensity of magnetic core improves significantly, and the disrepair phenomenon of magnetic core has not had yet.

Its adhesive strength foot is able to take suffered shock and vibration in the middle of carrying, though and binding agent 29 ₁, 29 ₂Coefficient of linear expansion ratio gap gasket material big, but can think variation not influence substantially to the gap of gap liner 2.

Thereby the inductance rate of change is shown in Fig. 5 with the characteristic of magnetic core variations in temperature, shows A～Fig. 6 with Fig. 6 _cShown in the identical characteristic of product.

Also have, though above-mentioned second embodiment has used one group to be asymmetrical U type magnetic core with same its pin partial-length of first embodiment, but also can use the U type magnetic core of one group of pin partial-length symmetry, even and use with the same a plurality of magnetic core set of first embodiment also passable altogether.

Use the binding agent or the use of binary epoxy resin series in first embodiment, can obtain identical result with the binding agent of the silicon rubber series of crossing.

Device for transformer to above-mentioned second embodiment, because injecting magnetic core jack one side's magnetic core pin portion does not bond together with winding assembly, so to the particularly use under cryogenic conditions, part between jack inwall and magnetic core surface can compensate the change in size of magnetic core and other material.Because do not have big active force to increase, can prevent the breakage of magnetic core to magnetic core.That is to say, broadened, both made in the winter time, also can transport, so can reduce the freight with the cheap land route transportation resources such as Scibilia railway of freight charges owing to comprise the serviceability temperature scope of transporting, taking care of.Again because and the magnetic core winding assembly bonding firmly, even when making pulse transformer, do not producing vibratory murmur between magnetic core and between magnetic core and winding assembly yet; As make simple substance epoxy resin series binding agent as binding agent, and because thermmohardening at short notice in most cases, thereby the short time sclerosis is possible, this has just saved and has made necessary energy, has to reach the such advantage of being expected of energy-saving effect.

Claims (10)

1, a kind of device for transformer, it is characterized in that having and use the end face of a plurality of magnetic cores binding agent bonding each other, on the butt joint end face, clip the gap liner, be formed with the magnetic core part of " mouth " font magnetic circuit, has the winding part of partly being inserted by the pin of this magnetic core, structure with the synthetic resin composition that is filled in this winding part surrounding space, outwards overflow from the end face of magnetic core at this binding agent aspect near the formation of the topped magnetic core outer peripheral portion this end face in back, use at least in-45 ℃～130 ℃ temperature range, Shore hardness at the elastic binder below 80 as binding agent.

2,, it is characterized in that in said temperature range, this binding agent has 20Kg/cm according to the device for transformer of claim 1 ²Above cohesive force.

3,, it is characterized in that said binding agent is the silicon rubber binding agent according to the device for transformer of claim 1.

4,, it is characterized in that said gap liner is non magnetic filiform according to the device for transformer of claim 1.

5, a kind of device for transformer, it is characterized in that having and use the end face of a plurality of magnetic cores binding agent bonding each other, on interface, clip the gap liner, be formed with the magnetic core part of " mouth " font magnetic circuit, has the configuration aspects that the winding part partly inserted by the pin of this magnetic core is formed at the synthetic resin that is filled in this winding part surrounding space, at least do not overflow to the outside at this binding agent of junction surface, a place, and the internal diameter of winding centre bore is greater than the external diameter of pin part from the magnetic core end face.

6, according to the device for transformer of claim 5, when it is characterized in that synthetic resin part that the synthetic resin part around the said winding that is partly injected by a pin partly injects than another pin has bigger diameter, with near the part of the pin this junction surface as the big synthetic resin side partly of diameter.

7, according to the device for transformer of claim 5, it is characterized in that said binding agent is at least in-45 ℃-130 ℃ temperature range, its Shore hardness is the elastomeric adhesives below 80.

8,, it is characterized in that used binding agent has 20kg/cm in this temperature range according to the device for transformer of claim 5 ²Above cohesive force.

9,, it is characterized in that used binding agent is the silicon rubber binding agent according to the device for transformer of claim 5.

10,, it is characterized in that said gap liner is non magnetic filiform according to the device for transformer of claim 5.

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