CN1217554A - Air-gap preset type integrally formed magnetic core and mfg. method therefor - Google Patents
Air-gap preset type integrally formed magnetic core and mfg. method therefor Download PDFInfo
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- CN1217554A CN1217554A CN 97122119 CN97122119A CN1217554A CN 1217554 A CN1217554 A CN 1217554A CN 97122119 CN97122119 CN 97122119 CN 97122119 A CN97122119 A CN 97122119A CN 1217554 A CN1217554 A CN 1217554A
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- magnetic stamen
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Abstract
The present invention relates to a preset air-gap integral-formed magnetic core and its production method. Said production method includes the following steps: it is made into a square-mouth form firstly, its one side is sloted along its cross section, and the slot is used as air gap,and another side corresponding to the slot is prenotched, and when the magnetic core is mounted in the coil, firstly, its other two sides which are not sloted or notched are forced to break the sloted and notched sides to form two U-shaped magnetic cores, then the two correspondent sides having no slot and notch of two U-shaped magnetic cores are tightly combined together to form a magnetic field path, so that it can increase magnetic core power, and reduce adosculation effect and ringing.
Description
The present invention relates to magnetic stamen and manufacture method thereof in a kind of high-tension electricity generator coil.
General high-tension electricity generator 1 commonly used, please refer to shown in Figure 1, mainly be meant a kind of device that the required high-tension electricity of cathode ray tube normal operation is provided, this device comprises a housing 11, be provided with an accommodation space 12 in this housing 11, make a support body 40 and on the high-voltage capacitance 43 installed, coil 41 and other rectifier cell 42 etc. just can be placed in this housing 11, in addition, these housing 11 lateral margin appropriate positions also are provided with groove 13, this groove 13 just can make one to adjust button 20 embeddings wherein, after treating that these elements are assembled in the accommodation space 12 of this housing 11, give the sealing location again.Outside set terminals 44 then are exposed on this support body 40, these terminals 44 of mat are connected with other interlock circuit, in addition, this high-tension electricity generator 1 is provided with one group of U type magnetic stamen 30,31, it is to be set in the through hole 45 of this housing 11, and mat one fastener 32 is fixed, the central authorities that make this equimagnetic stamen 30,31 just run through this coil 41, form a normal path, magnetic field, and this group U type magnetic stamen is on the middle position that runs through this coil 41 and be provided with air gap G (as shown in Figure 2), to increase the power of magnetic stamen.
When this magnetic stamen 30,31 is fixed in the coil 41, and when the air gap G that the magnetic stamen is 30,31 just is arranged in coil 41, as shown in Figure 2, because this coil 41 is when electric current passes through, to in magnetic stamen 30,31, produce the corresponding magnetic line of force, at this moment, because of the existence of air gap, to cause near its magnetic line of force to be bending, promptly so-called proximity effcet (Proximity Effect).Its magnetic in X-axis and Z-direction close (density of line of magnetic force) then is the variation of approximate W EIBULL curve, shown in Fig. 3 A, B.At this moment, as can be known by the magnetic induction voltage equation:
Near in the magnetic stamen 30,31 air gaps the X-axis and the magnetic induction voltage Vx and the Vz of Z-direction also produce identical variation, so, near the take up an official post induced voltage V of point-to-point transmission of the magnetic stamen 30,31 of air gap
1And V
2Obviously unequal, if it is the impedance of this point-to-point transmission is r, then inevitable because of consumed power W=(V
1-V
2)
2/ r and generating heat, this is referred to as closely to connect heat again.And in this high-tension electricity generator 1 except that primary coil 410, secondary coil 411 also returns time T in speeding
RProduce and closely to connect heat, this two closely connects heat and will make that the insulating varnish and the sealing epoxy resin temperature of copper cash rises near it, and reduces the useful life of these insulating material, and produces following point:
(1) because, near this air gap G primary coil 410, secondary coil 411, this primary coil 410 and magnetic stamen 30,31, this secondary coil 410, each interlayer of 411 and secondary coil 411 all is with organic plastic cement (material) matter mutually insulated, and because of sealing, it is bad to cause heat conduction, so what produced closely connects heat, will be difficult because of dispelling the heat, and make the temperature of these insulation plastic cement rise, on the practice, the copper cash insulating varnish temperature of this primary coil 410 reaches as high as 53 ℃, destroyed in case insulate, then transformer short-circuit lost efficacy, then can produce explosion or on fire if continue to use, and the mean time to failure, MTTF of reciprocating transformer (MTBF) is to design in the running 0.5 * 10 down of 65 ℃ of states
6Hour, and according to theory, the temperature of plastic cement is in more than 65 ℃, its life-span changing factor is δ=ε
-0.1 (Δ t)So the mean time to failure, MTTF of high-tension electricity generator 1 will reduce to 0.5 * 10
6* ε
-0.1 (Δ t)=0.29 * 10
6Hour, trust level 0.90 and do not conform to the rules.Coil 41 short circuits and safety problem thereof are the fatal shortcoming of high-tension electricity generator 1.
(2) consult shown in Figure 4, the diode D of driver (driver) in this high-tension electricity generator 1
tDuring returning in speeding, its primary coil N
pThe energy that is disengaged after secondary coil Ns converts high-tension electricity to, transistor X
rWith in good time conducting, move with the energy storage of carrying out another cycle, so, dynamically, primary coil N
pIn inclined to one side flyback time is short-circuit condition, in the inclined to one side flyback time during same, energy in this secondary coil Ns is because the characteristic of circuit, all output, please refer to shown in Figure 5ly, cause remaining energy oscillation in the leakage inductance Ls ' of secondary coil Ns and between stray capacitance C ', and produce ringing, as shown in Figure 6, through distributed capacitance C ' Ps and modulation V
B, and because V
BAlso supply the video signal circuit indirectly,, produce shadow 1,2,3 as shown in Figure 7 so the video signal of cathode ray tube also by the ring modulation, and goes up corresponding to 1 in the ring, 2,3 each points in its light territory (RASTER), this kind shadow on the QC project also the owner want shortcoming.
(3) in addition, this U type magnetic stamen 30,31 is behind sintering, bipod must be worn into a plane and an air gap perpendicular to its center line, makes this two magnetic stamen 30,31 can form a desirable magnetic circuit in this primary coil 410, only, because the influence of economic factor and the restriction of grinding technique, these abradant surfaces and its centreline space generally all form an angle, make the combination of two magnetic stamens 30,31 after, its air gap G also forms an angle, as shown in Figure 8, produce following point:
A) 30,31 of this equimagnetic stamens coupling difficulty, when desire is sought magnetic stamen 30,31 combinations of closing in primary inductance Lp, must be through repeatedly attempting, thereby reduce manufacturing speed, and increase cost.
B) difficulty is grasped in air gap proximity effcet and secondary coil 411 rings, because of the difficult control of air gap shape, so closely connecing thermal effect, it also is difficult for grasping, and secondary ring also is difficult for grasping because of the magnetic coupling of this secondary coil 410,411, and ring usually can only be behind sealing and installing magnetic stamen 30,31, beginning can be tested, thus must emit the nonconforming risk of quality, and increase its cost on foot.
In view of this, for improving the various shortcomings of above-mentioned usual means structure, the inventor is through the permanent research and experiment of making great efforts, and development and Design goes out air-gap preset type integrally formed magnetic stamen of the present invention and manufacture method thereof finally.
A purpose of the present invention, in the manufacture method that a kind of air-gap preset type integrally formed magnetic stamen is provided, this method is the interior magnetic stamen of coil that order is set in the high-tension electricity generator, make in one-body molded mode, use the magnetic stamen of this method manufacturing that the power of magnetic stamen is increased, and make near the unlikely formation bending of the magnetic line of force the coil, and then reduce proximity effcet and ringing.
Another object of the present invention, a kind of air-gap preset type integrally formed magnetic stamen is being provided, mat is not deposited and near on the magnetic stamen of coil a short slot is set, to form air gap, make this air gap can make the power of magnetic stamen increase, and in coil magnetic stamen is set because of being fluid-tight engagement fully, thus near the unlikely formation bending of the magnetic line of force of coil can be made, and the generation of minimizing proximity effcet and ringing.
For this reason, technical scheme of the present invention is: a kind of manufacture method of air-gap preset type integrally formed magnetic stamen, it is characterized in that: this method is in one-body molded mode, precasting sinters the magnetic stamen of a square shape into, and in a side of this magnetic stamen, along the default short slot of its section, with usefulness as air gap, when desire is mounted to this magnetic stamen in the coil of this high-tension electricity generator, but mat grips two respective side in addition that are adjacent to this short slot on this magnetic stamen, and to its application of force, this square shape magnetic stamen is ruptured in the side and the respective side thereof that are preset with short slot, formation two slightly is the magnetic stamen of U font, afterwards the two corresponding fracture place fluid-tight engagement of not establishing short slot on this two U font magnetic stamen is installed in the coil again, and two corresponding fractures place that are provided with short slot are then installed in the coil outer engagement, this two U font magnetic stamen mat one fastener buckle is again fixed, making this two U font magnetic stamen fluid-tight engagement together, and the central authorities of running through this coil, path, a magnetic field formed.
On this magnetic stamen corresponding to the in addition side of this short slot, can be along the default indentation of its section, when desire is mounted to this magnetic stamen in the coil of this high-tension electricity generator, but mat grips two respective side in addition that are adjacent to this short slot on this magnetic stamen, and to its application of force, this square shape magnetic stamen is ruptured in the respective side that is preset with this short slot and indentation, and formation two slightly is the magnetic stamen of U font.
Above-mentioned buckle element is to be a Jiong shape fastener, make with this two magnetic stamen that slightly is the U font closely buckle be bonded together.
A kind of air-gap preset type integrally formed magnetic stamen is characterized in that: mainly comprise:
Two slightly are the magnetic stamen of U font, and two corresponding end of this two magnetic stamen are fluid-tight engagement just each other, forming the magnetic stamen of a square shape, and in this two magnetic stamen side of fluid-tight engagement just each other, are preset with a short slot along its section, with the usefulness as air gap;
This two magnetic stamen that slightly is the U font is in the coil that is mounted to a high-tension electricity generator time, be that this two side that slightly is on the magnetic stamen of U font fluid-tight engagement each other and does not establish short slot is installed in coil, the respective side that is provided with short slot then is installed in outside the coil, this two U font magnetic stamen mat one buckle element buckle is again fixed, can make this two U font magnetic stamen fluid-tight engagement together, and the central authorities of running through this coil, form path, a magnetic field.
Above-mentioned buckle element can be a Jiong shape fastener, makes this two U-shapeds magnetic stamen buckle is bonded together.
Adopt technique scheme, because, the formed air gap of this short slot is arranged on not near on the magnetic stamen of coil among the present invention, so this air gap can make the power of magnetic stamen increase, in addition, because but the magnetic stamen that is provided with in coil is a fluid-tight engagement, thus near the unlikely formation bending of the magnetic line of force the coil can be made, thus can reduce the generation of proximity effcet and ringing.
For enabling to purpose of the present invention, shape constructing apparatus feature and effect thereof, make further understanding and understanding, for the embodiment conjunction with figs., be described in detail as follows now:
Fig. 1: the upright schematic diagram of part group that is conventional high-tension electricity generator;
Fig. 2: the magnetic figure that is traditional magnetic stamen;
Fig. 3 A: be the close and magnetic induction change in voltage figure of X axis magnetic;
Fig. 3 B: be the close and magnetic induction change in voltage figure of Z axial magnetic;
Fig. 4: the basic circuit diagram that is conventional high-tension electricity generator;
Fig. 5: be traditional interior ringing circuit of high-tension electricity generator and modulation VB schematic diagram;
Fig. 6: be the ring schematic diagram that secondary coil produces;
Fig. 7: be the shadow figure that on the light territory of cathode ray tube, is produced;
Fig. 8: be the composition surface out-of-flatness of traditional two magnetic stamens, and produce crooked schematic diagram;
Fig. 9: be magnetic stamen floor map of the present invention;
Figure 10: the magnetic figure that is magnetic stamen of the present invention.
The main element numbering:
3 ... hollow magnetic stamen 30,31 ... U font magnetic stamen
33 ... indentation 34 ... short slot
The present invention is a kind of " manufacture method of air-gap preset type integrally formed magnetic stamen and structure thereof ", please refer to shown in Figure 1, mainly be at being set in this high-tension electricity generator 1 in the through hole 45 of this housing 11, and the fixing magnetic stamen 30 of mat one fastener 32,31, to make it just can run through the central authorities of this coil 41, form the manufacture method and the structure thereof of the magnetic stamen in a normal path, magnetic field, the present invention is in one-body molded mode, please refer to shown in Figure 9ly, precasting sinters the magnetic stamen 3 of a hollow into, and in a side of this magnetic stamen 3, along the default at least one short slot 34 of its section, with usefulness as air gap, and corresponding to the in addition side of these short slot 34 sides, then along the default indentation 33 of its section.
When desire is mounted to this magnetic stamen 3 in the coil 41, but mat grips two sides in addition that this magnetic stamen 3 is not provided with indentation and short slot, and, this square shape magnetic stamen 3 is ruptured in two respective side that are provided with indentation 33 and short slot 34, and form the two magnetic stamens 30,31 that slightly are the U font to its application of force.Afterwards, again this two slightly is two corresponding fractures place of not establishing short slot 34 on the magnetic stamen 30,31 of U font and installs in coil, and make this two corresponding fracture place fluid-tight engagement, two corresponding fractures place that are provided with short slot 34 are fluid-tight engagement outside coil then, this two magnetic stamen 30,31 that slightly is U font mat fastener 32 buckles is again fixed, can make this two magnetic stamen 30,31 that slightly is the U font each other fluid-tight engagement and form a desirable path, magnetic field together.
Among the present invention, because these short slot 34 formed air gaps are to be provided with on the magnetic stamen of depositing away from coil 41 3, so this air gap can make the power of magnetic stamen 30,31 increase, in addition, owing to this two 30,31 of magnetic stamen that slightly are the U font be set in coil be fluid-tight engagement together, there is any air gap hardly, so be bordering on coil 41 places because of air gap ends the dependence upon, and make near the coil among the present invention 41 the unlikely formation bending of the magnetic line of force, so, can significantly improve proximity effcet and ringing that conventional high-tension electricity generator 1 is produced.
The above, it only is a preferred embodiment of the present invention, be not in order to limit practical range of the present invention, to implement according to the described content of the invention described above technical scheme scope, feature and spiritual equivalence of doing thereof such as, all should be contained in the technical scheme scope of the present invention.
Claims (5)
1, a kind of manufacture method of air-gap preset type integrally formed magnetic stamen, it is characterized in that: this method is in one-body molded mode, precasting sinters the magnetic stamen of a square shape into, and in a side of this magnetic stamen, along the default short slot of its section, with usefulness as air gap, when desire is mounted to this magnetic stamen in the coil of this high-tension electricity generator, but mat grips two respective side in addition that are adjacent to this short slot on this magnetic stamen, and to its application of force, this square shape magnetic stamen is ruptured in the side and the respective side thereof that are preset with short slot, formation two slightly is the magnetic stamen of U font, afterwards again the two corresponding fracture place fluid-tight engagement of not establishing short slot on this two U font magnetic stamen are installed in the coil, two corresponding fractures place that are provided with short slot are then installed in the coil outer engagement, and this two U font magnetic stamen mat one fastener buckle is again fixed, to make this two U font magnetic stamen fluid-tight engagement together, and the central authorities of running through this coil, form path, a magnetic field.
2, the manufacture method of air-gap preset type integrally formed magnetic stamen as claimed in claim 1, it is characterized in that: on this magnetic stamen corresponding to the in addition side of this short slot, can be along the default indentation of its section, when desire is mounted to this magnetic stamen in the coil of this high-tension electricity generator, but mat grips two respective side in addition that are adjacent to this short slot on this magnetic stamen, and, this square shape magnetic stamen being ruptured in the respective side that is preset with this short slot and indentation to its application of force, formation two slightly is the magnetic stamen of U font.
3, the manufacture method of air-gap preset type integrally formed magnetic stamen as claimed in claim 1 is characterized in that: described buckle element is the fastener that this two tight buckle of magnetic stamen that slightly is the U font is bonded together for a Jiong shape.
4, a kind of air-gap preset type integrally formed magnetic stamen is characterized in that: mainly comprise:
Two slightly are the magnetic stamen of U font, and two corresponding end of this two magnetic stamen are fluid-tight engagement just each other, forming the magnetic stamen of a square shape, and in this two magnetic stamen side of fluid-tight engagement just each other, are preset with a short slot along its section, with the usefulness as air gap;
This two magnetic stamen that slightly is the U font is in the coil that is mounted to a high-tension electricity generator time, be that this two side that slightly is on the magnetic stamen of U font fluid-tight engagement each other and does not establish short slot is installed in coil, the respective side that is provided with short slot then is installed in outside the coil, this two U font magnetic stamen mat one buckle element buckle is again fixed, can make this two U font magnetic stamen fluid-tight engagement together, and the central authorities of running through this coil, form path, a magnetic field.
5, air-gap preset type integrally formed magnetic stamen as claimed in claim 4 is characterized in that: this buckle element can be the fastener that this two U-shapeds magnetic stamen buckle is bonded together of a Jiong shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97122119 CN1217554A (en) | 1997-11-14 | 1997-11-14 | Air-gap preset type integrally formed magnetic core and mfg. method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97122119 CN1217554A (en) | 1997-11-14 | 1997-11-14 | Air-gap preset type integrally formed magnetic core and mfg. method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1217554A true CN1217554A (en) | 1999-05-26 |
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ID=5176689
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97122119 Pending CN1217554A (en) | 1997-11-14 | 1997-11-14 | Air-gap preset type integrally formed magnetic core and mfg. method therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1217554A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969140A (en) * | 2012-06-29 | 2013-03-13 | 横店集团东磁股份有限公司 | EI-type magnetic core production method and air gap cutting equipment |
-
1997
- 1997-11-14 CN CN 97122119 patent/CN1217554A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969140A (en) * | 2012-06-29 | 2013-03-13 | 横店集团东磁股份有限公司 | EI-type magnetic core production method and air gap cutting equipment |
| CN102969140B (en) * | 2012-06-29 | 2014-12-31 | 横店集团东磁股份有限公司 | EI-type magnetic core production method and air gap cutting equipment |
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