CN2462547Y - Multi-layer central driving ceramic transformer - Google Patents
Multi-layer central driving ceramic transformer Download PDFInfo
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- CN2462547Y CN2462547Y CN01200033.7U CN01200033U CN2462547Y CN 2462547 Y CN2462547 Y CN 2462547Y CN 01200033 U CN01200033 U CN 01200033U CN 2462547 Y CN2462547 Y CN 2462547Y
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- 238000003475 lamination Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 10
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Abstract
The utility model relates to a multi-layer central driving ceramic transformer, which is characterized in that electrode surfaces of a piezoelectric ceramic green compact are alternatively arranged according to odd layers and even layers with different polarity. Two electrode surfaces [1], [2] and [3], [4] of each layer are assembled according to complementary shapes, wherein, the odd layers and the even layers are mutually staggered and are electrically connected to respectively form input ends [7], [8]. At the same time, each odd layer and each even layer are stacked in the direction of a long shaft of the input ends, and two free ends are mutually and electrically connected to form output ends [5], [6]. The utility model has the advantages that the resonance mode of one half wavelength is enhanced, the resonance mode of a complete wavelength is inhibited and disappears, and the conversion efficiency of the transformer is effectively improved.
Description
The utility model relates to a kind of transformer, particularly a kind of multilayer center driven ceramic transformer.
The development of piezoelectric transformer, can trace back to the thesis for the doctorate research of C.A.Rosen in 1956 the earliest, it develops the principal mode that ... horizontal transformer, what generally also therefore claim is the Rosen-type piezoelectric transformer, shown in Figure 1, be the structure of Rosen-type transformer, as shown in FIG., piezoelectric ceramic transformer is mainly a rectangular ceramic thin plate sheet, and is laid (with polarised direction) and be divided into 2 half parts by its electrode.Wherein, for step-up transformer, the position of its driving (input) is to be covered with silver electrode by upper and lower each demifacet is evenly burnt along its length, and as the AC input.Therefore, what this position also just can claim is to drive (driver), and its polarised direction is along thickness direction polarization (resistance value is lower).Another partly (small size silver electrode face) then, what can claim is Power Generation Section (generator), its all silver electrode faces then be positioned on the face on end limit, and as output, the polarised direction of Power Generation Section then are polarize along its length (resistance value height).Under this horizontal transformer device structure, when the AC of drive division incoming frequency is identical with transformer length direction resonance frequency, whole piezoelectric transformer also will produce mechanical resonant, that is be by inverse piezoelectric effect (electric energy one mechanical energy), produce stretching vibration along its length, and this mechanical resonant, then in the Power Generation Section, because direct piezoelectric effect (a mechanical electric energy), export and be converted into voltage, because the length of potsherd is much larger than thickness, so the impedance of output (Power Generation Section) much larger than input (drive division) impedance, thereby has the effect of boosting to produce.
In addition, because the resonance phenomena of piezoelectric ceramic piece, in its all-wave frequency, all can produce under the situations such as half wave frequencies and 3/2 wave frequency, also therefore, with regard to its operation mode that boosts, also can be divided into half-wave, all-wave and 3/2 mode attitude, and under each model frequency, the phenomenon of significantly boosting is all arranged, and generally the resonance mode with all-wave and half wave frequencies more generally adopts, and the frequency that is particularly useful for a cold-cathode tube (CCFL) is 40K-60KHz, based on half-wave mode, piezoelectric ceramic transformer when producing single mode resonance and do not have other vibration frequency to come consumed energy, can obtain maximum conversion efficiency when using, utilize the arrangement of electrode design and supporting way, can reach the effect of single mode resonance, and improve conversion efficiency.
Piezoelectric ceramic transformer, the L/t of its step-up ratio and potsherd is directly proportional, and (L is a potsherd length, t is a potsherd thickness), if improve the words of step-up ratio, essential will be with the potsherd attenuation or with the length lengthening, this will make transformer become easily to break or length is too big, and can't be applied in the actual circuit, therefore how at aspect designing optimals such as intensity, efficient, availabilities, promptly become problem anxious to be solved.
Relevant with this case but technological means is totally different or the feature technology means are diverse has, Taiwan patent announcement the 400659th stacked piezoelectric transformer and manufacture method thereof, 393789 piezoelectric transformer elements and manufacture method thereof, 379457 lamination type piezoelectric transformers, and 333715 stack-up type pressure transformer and manufacture methods thereof.Wherein, 400659 formation that disclose each ceramic layer of transformer bay are mat mixing a small amount of metal dusts to one and should be formed in by the ceramic powders person that same material caused of piezoelectric ceramic piece between all layers of efferent, also point out simultaneously the kind and the composition percentage by weight of its metal dust, its technological means and this case are irrelevant, can be the reference background data; 393789 instructions, one strengthening layer is located at this piezoelectric transformer and is driven the concentrated place of time control tensile stress, and it is mainly in the problem that solves mechanical strength: 379457 point out that the individual layer piezoelectric member thickness of drive division comes from the individual layer piezoelectric member thickness of electricity generating section (Power Generation Section); And 333715 basic kenel of pointing out lamination; This case promptly is to propose a kind ofly to utilize that the polarity of electrode is staggered in the input at above-mentioned lamination pattern piezoelectric ceramic transformer, improves the effective scheme of its conversion efficiency.
Therefore, main purpose of the present utility model is providing the multiple field center driven piezoelectric ceramic transformer of a kind of high transformation ratio and high conversion efficiency.
Above-mentioned purpose of the present utility model is realized by following technical scheme.
A kind of multiple field center driven ceramic transformer, be to pile up common burning by the living embryo of multilayer piezoelectric ceramic to form, it is characterized in that: this piezoelectric ceramic is given birth to the electrode surface of printing on the embryo, be staggered with opposed polarity by odd number layer 2n-1 and even numbers layer 2n, and respectively two electrode surfaces [3], [4] of these unipolar two electrode surfaces [1], [2] and two-layer electrode then form with the rough shape configuring stacking that is complementation; Wherein, this odd number layer 2n-1 and this interlaced with each other electrically connecting of even numbers layer 2n and form input [7], [8] respectively, and respectively this odd number and even numbers layer are stacked on long axis direction two free ends with respect to above-mentioned input and electrically connect each other and form output [5], [6]; So,, strengthen the resonance mode of 1/2 wavelength, suppress the long resonance mode of all-wave by above-mentioned stacked arrangement.
Except that above-mentioned essential features, in specific implementation process, also can replenish following technology contents:
Respectively two electrode surfaces of this electrode layer are complementary trapezoidal aspect.
Respectively two electrode surfaces of this electrode layer are complementary L shaped aspect.
Comprise that further upper and lower blanket layer [T], [B] are located at this single, double several layers upper and lower surface and pile up and form suitable electrical connection.
The input at least one surface of this upper and lower blanket layer [T], [B] extends along its short-axis direction, in order to welding and support.
The output at least one surface of piling up the formation of long axis direction two free ends of this ceramic transformer extends along its long axis direction, in order to welding and support.
The ratio of this potsherd length L 1 and input electrode length L 2 is about between 0.35 to 0.06.
This L1 and L2 ratio are preferably between 0.45 to 0.55.
Advantage of the present utility model is:
Utilize the polarity of electrode in the input to be staggered, use the resonance mode of strengthening 1/2 wavelength, effectively suppress the conversion efficiency that the long resonance mode of all-wave improves transformer simultaneously.
To and be aided with accompanying drawing with embodiment and do exemplary illustrated for further understanding the purpose of this utility model and advantage thereof, wherein;
Description of drawings:
Fig. 1 is existing sketch with the Luo Sen piezoelectric transformer, shows the basic functional principle of ceramic transformer.
Fig. 2 is according to each lamination top view of an embodiment of the present utility model, and the configuration of show electrode pattern and feature thereof constitute.
Fig. 3 is the three-dimensional exploded view of Fig. 2, shows each lamination annexation.
Fig. 4 is the three-dimensional combination figure of Fig. 2, shows the polarised direction according to present embodiment.
Fig. 5 is the frequency characteristic figure between Fig. 4 input.
Fig. 6 (a) is the circuit connection diagram of the pressure ceramic transformer of Fig. 4.
Fig. 6 (b) is when load is 50K Ω, the step-up ratio of above-mentioned circuit under different frequency.
The relation of L2/L1 ratio and conversion efficiency in Fig. 7 displayed map.
Fig. 8 (a) shows different polarised directions.
Fig. 8 (b) reaches the frequency characteristic figure that (c) shows between input and the output.
Fig. 9 (a) is the circuit connection diagram of the piezoelectric ceramic transformer of Fig. 8.
Fig. 9 (b) is when load is 50K Ω, the step-up ratio of above-mentioned circuit under different frequency.
Figure 10 is according to another embodiment of the present utility model, the difference of the show electrode figure pattern that staggers.
Figure 11 (a) show electrode face strengthens on the blank aspect up and down, in order to welding and support.
Strengthen on the single blank aspect of Figure 11 (b) show electrode face, in order to welding and support.
Figure 12 (a) show electrode face all around strengthens, in order to welding and support.
Figure 12 (b) show electrode face top and bottom are strengthened, in order to welding and support.
Single of Figure 12 (c) show electrode face is gone up and is strengthened, in order to welding and support.
At first, please refer to the embodiment of Fig. 2 to Fig. 4 according to a kind of multiple field center driven ceramic transformer of this case, it mainly gives birth to the different electrode types of printing odd number layer and even numbers layer on the embryo at piezoelectric ceramic, and single, double in regular turn again piling up forms, and also can increase blanket layer up and down and form.Wherein, the odd number layer represents with 2n-1, and the even numbers layer represents that with 2n upper and lower blanket layer represents with T and B respectively.With one exemplary but non-limitingly do discussion, as only representing among Fig. 2 with single, double each layer laminate; In fact, can be a positive integer according to design requirement n, expression 1,2,3 ..., relatively, 2n-1 represents 1,3,5 ... Deng odd-level, 2n represents 2,4,6 ... on even number or even numbers layer.Odd number layer 2n-1, interlaced with each other the electrically connecting of even numbers layer 2n and form respectively input respectively with label 7 and 8 the expression; Long axis direction two free ends of each layer stack electrically connect each other and form output respectively respectively with label 5 and 6 expressions, by piezoelectric effect, the length of potsherd is much larger than thickness, so the impedance of output much larger than sending-end impedance, thereby has the effect of boosting to produce.Certainly the operation of step-down also can obtain through the suitable displacement of same principle.
The major advantage of this case polarity of electrode in utilizing input is staggered, and uses the resonance mode of strengthening 1/2 wavelength, effectively suppresses the conversion efficiency that the long resonance mode of all-wave improves transformer simultaneously, and its spirit can be obtained embodying by Fig. 2 and following explanation.
Fig. 2 shows the top view of each lamination or lamination, and each odd number lamination 2n-1 and even numbers layer 2n form polarity and be staggered, and the electrode of every electrode layer 2n-1,2n is then with the rough shape configuration that is complementation.With an embodiment, odd number layer electrode 1 and 2 is trapezoidal aspect respectively, and its inclined-plane is opposed again is rough parallel in shape; Particularly, electrode 1 has base 11, the dual-side 12 that long axis direction extends, 13 and hypotenuse 14 shapes or a trapezoidal aspect, and its relative complementary trapezoidal electrode 2 has relative base 21, the dual- side 22,23 that long axis direction extends and the hypotenuse 14 rough hypotenuses that are parallel but separate 24 of rough and above-mentioned the 1st electrode 1 so form the complementary configured form of odd number layer electrode.Electrode 3 and 4 forms another staggered electrode of even numbers layer 2n, and it mainly is opposite slope direction at hypotenuse; Particularly, electrode 4 has base 41, the dual-side 42 that long axis direction extends, 43 hypotenuses 44 that reach according to slope direction form a trapezoidal aspect, and its relative complementary trapezoidal electrode 3 has relative base 31, the dual-side 42 that long axis direction extends, 43 and the hypotenuse 44 rough hypotenuses that are parallel but separate 34 of rough and above-mentioned the 4th electrode 4, so form the complementary configured form of even numbers layer electrode, and the odd number layer, makes odd number layer 2n-1 and even numbers layer 2n form polarity and is staggered because the slope of hypotenuse is opposite with the even numbers interlayer; So, can be connected to form input 7 when the living embryo of each lamination piles up common burning rear electrode 1 and 3, and electrode 2 and 4 is connected to form input 8, formation polarity in polarization back is opposite between 7 and 8 simultaneously, represents with P1 and P2; P3, the polarity of P4 is also opposite, and P1 is identical with P4 polarity, and promptly adjacent up and down polarity is all opposite, and forms whole opposite polarised direction with 9 and 10 expressions, and forms output 5 and 6 in two long axis directions.
Fig. 5 shows the frequency characteristic figure between the input 7,8, and Fig. 6 (a) points out the typical circuit connection layout according to the piezoelectric ceramic transformer of this case.When simultaneously Fig. 3 (b) points out with exemplary load 50k Ω, the above-mentioned step-up ratio VO/Vi of network road under different frequency, clear demonstration only has voltage output in half wave resonances mode.Fig. 7 specifically notes the relation of electrode length and ceramic length L 2/L1 ratio and conversion efficiency, data show that L2/L1 ratio has quite outstanding efficiency value at 0.35 to 0.60, and especially 0.45 to 0.55 efficient all more than 95%, effectively improve the conversion efficiency of piezoelectric ceramic transformer, reach its creation purpose.
Next, the difference that please the join Figure 10 this case electrode surface form that is staggered, its relatively part repeat no more, only differently partly do explanation with regard to it.Zone about mainly dividing by the embodiment electrode pattern of Figure 10, the rough L shaped aspect of English capitalization that is spaced intermediate, each odd number layer 2n-1 and even numbers layer 2n form polarity and are staggered, and each electrode layer 2n-1, the electrode of 2n is then with the rough shape configuration that is complementation, its different complementary bevel L-shaped at the odd number layer with 14 ' and 24 ', and represent with 44 ' and 34 ' at the even numbers layer, making odd number layer and even numbers layer form polarity is staggered, simultaneously, when each lamination embryo piles up common burning after suitably configuration, also can form opposite or identical polarised direction, also can be in like manner connect by the configuration of circuit and obtain suitable output, this part should directly be released no longer detailed description from aforementioned discussion.
Figure 11 show electrode face blanket layer up and down strengthens, help welding and support, wherein Figure 11 (a) input 7,8 electrode surfaces prolong the extension of minor axis Y direction, effectively strengthen electrode area, and Figure 11 (b) only prolongs the short-axis direction extension in last blanket layer, under the intrinsic limitation of geometric area and electrical isolation, and the increasing of this Y direction or extension and without particular limitation basically, the production benefit that it is derived promptly is beneficial to welding and supports then very obvious.
Figure 12 shows the increasing of output 5,6 electrode surfaces, and wherein its output of Figure 12 (a) prolongs axial x direction extension all around, and (b) outer surface at the blanket layer electrode surface prolongs the extension of x direction, and (c) figure then only goes up the blanket layer increasing; Extension by the output terminal electrode face also helps welding and supports with configuration.
This case is so far believed and is clearly demonstrated, its main spirit polarity of electrode in utilizing input is staggered, the complementary shape configuration of main utilization transmission of electricity pole-face reaches the resonance mode of strengthening 1/2 wavelength and effectively suppresses the long resonance mode of all-wave with staggered electrical connection of odd number even numbers electrode layer, and then the whole conversion efficiency of raising.
Claims (8)
1, a kind of multiple field center driven ceramic transformer, be to pile up common burning by the living embryo of multilayer piezoelectric ceramic to form, it is characterized in that: this piezoelectric ceramic is given birth to the electrode surface of printing on the embryo, be staggered with opposed polarity by odd number layer 2n-1 and even numbers layer 2n, and respectively two electrode surfaces [3], [4] of these unipolar two electrode surfaces [1], [2] and two-layer electrode then form with the rough shape configuring stacking that is complementation; Wherein, this odd number layer 2n-1 and this interlaced with each other electrically connecting of even numbers layer 2n and form input [7], [8] respectively, and respectively this odd number and even numbers layer are stacked on long axis direction two free ends with respect to above-mentioned input and electrically connect each other and form output [5], [6].
2, according to the said a kind of multiple field center driven ceramic transformer of claim 1, it is characterized in that: respectively two electrode surfaces of this electrode layer are complementary trapezoidal aspect.
3, according to the said a kind of multiple field center driven ceramic transformer of claim 1, it is characterized in that: respectively two electrode surfaces of this electrode layer are complementary L shaped aspect.
4, according to the said a kind of multiple field center driven ceramic transformer of claim 1 to 3, it is characterized in that: comprise that further upper and lower blanket layer [T], [B] are located at this single, double several layers upper and lower surface and pile up and form electrical connection.
5, according to the said a kind of multiple field center driven ceramic transformer of claim 4, it is characterized in that: the input at least one surface of this upper and lower blanket layer [T], [B] extends along its short-axis direction.
6, according to the said a kind of multiple field center driven ceramic transformer of claim 4, it is characterized in that: the output at least one surface of piling up the formation of long axis direction two free ends of this ceramic transformer extends along its long axis direction.
7, according to the said a kind of multiple field center driven ceramic transformer of claim 4, it is characterized in that: the ratio of this potsherd length L 1 and input electrode length L 2 is about between 0.35 to 0.06.
8, according to the said a kind of multiple field center driven ceramic transformer of claim 4, it is characterized in that: this L1 and L2 ratio are preferably between 0.45 to 0.55.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01200033.7U CN2462547Y (en) | 2001-01-02 | 2001-01-02 | Multi-layer central driving ceramic transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN01200033.7U CN2462547Y (en) | 2001-01-02 | 2001-01-02 | Multi-layer central driving ceramic transformer |
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| CN2462547Y true CN2462547Y (en) | 2001-11-28 |
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| CN01200033.7U Expired - Fee Related CN2462547Y (en) | 2001-01-02 | 2001-01-02 | Multi-layer central driving ceramic transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324461A (en) * | 2011-07-20 | 2012-01-18 | 广州金升阳科技有限公司 | Radial-expandsion monolithic wafer type piezoelectric ceramic transformer and preparation method thereof |
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2001
- 2001-01-02 CN CN01200033.7U patent/CN2462547Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324461A (en) * | 2011-07-20 | 2012-01-18 | 广州金升阳科技有限公司 | Radial-expandsion monolithic wafer type piezoelectric ceramic transformer and preparation method thereof |
| CN102324461B (en) * | 2011-07-20 | 2013-11-06 | 广州金升阳科技有限公司 | Radial-expansion monolithic wafer type piezoelectric ceramic transformer and preparation method thereof |
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