CN109360886A - Step-up piezoelectric transformer and step-up method - Google Patents
Step-up piezoelectric transformer and step-up method Download PDFInfo
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- 229910052709 silver Inorganic materials 0.000 claims abstract description 11
- 239000004332 silver Substances 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/40—Piezoelectric or electrostrictive devices with electrical input and electrical output, e.g. functioning as transformers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/802—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits
- H10N30/804—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits for piezoelectric transformers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a kind of piezoelectric step-up transformer and step-up methods, and wherein piezoelectric step-up transformer includes upper bracket, piezoelectric ceramic piece and lower bracket, and piezoelectric ceramic piece applies pressure to piezoelectric ceramic piece by upper and lower bracket；Piezoelectric ceramic piece includes 4 regions, is followed successively by hollow area, inner circle area, isolation region, outer collar region from inside to outside；Hollow area is the installation region of upper and lower bracket connection；The upper surface plating of piezoelectric ceramic piece is there are two silver electrode, including input electrode and output electrode, passes through isolation strip zone isolation between two silver electrodes；The lower surface of piezoelectric ceramic piece is coated with a null electrode；Each input electrode, each output electrode draw a strip electrode line respectively.Piezoelectric step-up transformer structure of the invention is simple, and processing preparation is easy；The present invention, which applies piezoelectric ceramic piece using upper and lower bracket, to be constrained, by obtaining different voltages in output end in different location plated electrode, and exportable difference DC voltage after rectified circuit rectifies, and boosting is realized by adjusting.
Description
Technical field
The invention belongs to ceramic material fields, and in particular to a kind of piezoelectric step-up transformer and step-up method.
Background technique
Currently, electromagnetic transformers are the transformer being most widely used in the market, this has benefited from its relatively high technology
Maturity and market dependency degree.With the development of science and technology, electronic product gradually develops towards micromation, integrated direction,
Electromagnetic transformers are limited to the problems such as volume is big, weight is big, inflammable and electromagnetic interference is serious, therefore how to find high-performance, can replace
It is just paid high attention to for property transformer.Piezoelectric transformer comes into being by its excellent performance, with traditional electromagnetism transformation
Device is compared, include its worn with small in size, light-weight, high temperature resistant, resistance, electromagnetism interference, high conversion efficiency, and have
The significant advantages such as short-circuit automatic protection functions.C.A.Rosen has most invented ROSE type piezoelectric step-up transformer earlier than 1950s, but
It was unable to satisfy practical application request at that time because material is limited at that time, step-up ratio obtained is low, output power is small, therefore
Fail to obtain enough concerns.In recent years, the invention of PZT piezoelectric ceramics and the progress of preparation process have greatly pushed boosting piezoelectricity
Transformer technology innovation, currently, PZT piezoelectric ceramic step-up transformer is in kinescope, tonotron, ion generator
It is applied in equal high-tension apparatuses.
Summary of the invention
The invention discloses a kind of design of the structure of piezoelectric step-up transformer and packaging methods, using upper and lower bracket to piezoelectricity
Potsherd applies constraint, by obtaining different DC voltages in output end in different location plated electrode.At the resonant frequency fx, the liter
220V AC voltage through overdrive circuit can be converted to the DC voltage of 500~2000V by pressure piezoelectric transformer, at this time resonance
Impedance is about 10 Ω, and output power changes according to the difference of load.The piezoelectric step-up transformer structure is simple, size is small, raw
It is simple, high-efficient to produce production, can be applied in the high-tension apparatuses such as kinescope, tonotron, ion generator.
A kind of piezoelectric step-up transformer of the present invention applies piezoelectric ceramic piece using upper and lower bracket and constrains, passes through
Different DC voltages are obtained in output end in different location plated electrode.
A kind of buck-boost piezoelectric transformer, including upper bracket, piezoelectric ceramic piece and lower bracket are provided, piezoelectric ceramic piece is logical
It crosses upper and lower bracket and pressure is applied to piezoelectric ceramic piece；
Piezoelectric ceramic piece includes 4 regions, is followed successively by hollow area, inner circle area, isolation region, outer ring from inside to outside
Region；Hollow area is the installation region of upper and lower bracket connection；The upper surface of piezoelectric ceramic piece inner circle area and outer collar region is each
Plating is there are two silver electrode, including input electrode and output electrode, passes through isolation strip zone isolation between two silver electrodes；Inner ring area
The upper and lower faces in domain are respectively coated with an output electrode, and the upper and lower faces of outer collar region are respectively coated with an input electrode, piezoelectricity pottery
The lower surface of tile is coated with a null electrode；Each input electrode, each output electrode draw a strip electrode line respectively.
Above-mentioned technical proposal is connect, piezoelectric ceramic piece is circular ring shape, and inner circle area, isolation region, outer collar region are circle
Annular region.
Above-mentioned technical proposal is connect, upper and lower bracket constrains piezoelectric ceramic piece by the way of bolt and nut locking, and
Circular ring type gasket is equipped between upper bracket and bolt.
Above-mentioned technical proposal is connect, lower bracket is cylinder, and the center point is equipped with a protruding column, installs spiral shell in the protruding column
Bolt limits upper bracket；A protruding circular ring is additionally provided in the middle part of the lower bracket, the protruding circular ring and upper bracket cooperate to pressure
Electroceramics piece is constrained, and facilitates piezoelectric ceramic piece welding electrode；It is equipped with an aperture on lower bracket, is used for extraction electrode line.
Above-mentioned technical proposal is connect, upper bracket is cylindrical or cone, and centre is equipped with screw hole, and top annulus has installation to limit
Effect, upper bracket top are equipped with an electrode ports, are used for extraction electrode line；Bottom annulus and lower bracket cooperate to piezoelectric ceramic piece into
Row constraint.
Above-mentioned technical proposal is connect, circular ring type gasket is stainless steel gasket.
The present invention also provides a kind of step-up methods of buck-boost piezoelectric transformer, decompression by adopting the above technical scheme
Piezoelectric step-up transformer constrains piezoelectric ceramic piece, real by adjusting the diameter of upper and lower bracket bottom or the position of isolation strip
Existing buck-boost.
The present invention also provides a kind of step-up methods of buck-boost piezoelectric transformer, decompression by adopting the above technical scheme
Piezoelectric step-up transformer constrains piezoelectric ceramic piece, increases voltage value by adjusting the thickness of piezoelectric ceramic piece.
The present invention also provides a kind of step-up methods of buck-boost piezoelectric transformer, decompression by adopting the above technical scheme
Piezoelectric step-up transformer constrains piezoelectric ceramic piece, increases voltage by adjusting the overall diameter of piezoelectric ceramic piece.
Beneficial effects of the present invention: piezoelectric step-up transformer structure of the invention is simple, and processing preparation is easy；Benefit of the invention
Piezoelectric ceramic piece is applied with upper and lower bracket and is constrained, by obtaining different DC voltages in output end in different location plated electrode.
By adjusting the diameter of upper and lower bracket or the position of isolation strip, fewer to the inhibition of isolation strip, boosting is more obvious；Or by suitable
When the thickness for reducing piezoelectric ceramic piece is different to realize to increase voltage value or the appropriate overall diameter for increasing piezoelectric ceramic piece
Boosting.
Detailed description of the invention
Fig. 1 is the explosion figure of piezoelectric step-up transformer of the embodiment of the present invention；
Fig. 2 a is piezoelectric step-up transformer package structure diagram；
Fig. 2 b is A-A sectional view in Fig. 2 a；
Fig. 3 a, main view, left view and the top view that 3b, 3c are upper bracket；
Fig. 4 a, the A-A sectional view that 4b, 4c are lower bracket main view, top view and top view；
Fig. 5 is the structure chart of piezoelectric ceramic piece；
Fig. 6 is the voltage-frequency curve graph of the piezoelectric step-up transformer of embodiment 1；
Fig. 7 is the impedance-frequency curve graph of the piezoelectric step-up transformer of embodiment 1；
Fig. 8 is the power versus frequency curve graph of the piezoelectric step-up transformer of embodiment 1.
Specific embodiment
The present invention will be further explained with reference to the examples below.
Piezoelectric step-up transformer of the invention, which applies piezoelectric ceramic piece using the specific structure of upper and lower bracket, to be constrained, and is passed through
Different DC voltages are obtained in output end in different location plated electrode.
As shown in Figure 1, piezoelectric step-up transformer of the invention includes upper bracket 2, piezoelectric ceramic piece 3 and lower bracket 13, pressure
Electroceramics piece 3 applies pressure to piezoelectric ceramic piece by upper and lower bracket.
Piezoelectric ceramic piece 3 includes 4 regions, is followed successively by hollow area 14, inner circle area 15, isolation region from inside to outside
10 outer collar regions 11；Hollow area 14 is the installation region of upper and lower bracket connection；There are two silver for the upper surface plating of piezoelectric ceramic piece 3
Electrode passes through isolation strip zone isolation between two silver electrodes.The lower surface of piezoelectric ceramic piece is coated with a null electrode；It is each defeated
Enter electrode, each output electrode and draws a strip electrode line respectively.In the embodiment of the present invention, as shown in Figure 1, piezoelectric ceramic piece
3 inner circle areas 15 and outer collar region 11 are respectively coated with a silver electrode, and centre is separated with area of isolation.The silver electrode of inner circle area 15
For input electrode, the silver electrode of outer collar region 11 is output electrode.The input electrode extraction electrode line 9 of inner circle area 15, outer ring
The output electrode extraction electrode line 4 in region 11, piezoelectric ceramic piece bottom extraction electrode line 5.
In one embodiment of the present of invention, piezoelectric ceramic piece 3 is circular ring shape, inner circle area, isolation region, outer collar region
It is circular annular region.The polarization of piezoelectric ceramic piece through-thickness.
The mode that bolt and nut locking can be used in upper and lower bracket constrains piezoelectric ceramic piece, and upper bracket 2 and bolt 1
Between be equipped with circular ring type gasket 7.Stainless steel gasket can be selected in circular ring type gasket 7, which has high-intensitive feature.
The bolt 1 and nut 6 that the present invention uses are standard component.Upper bracket can be plastics, bolt locking after easy local deformation, therefore need
Add with high-intensitive stainless steel gasket, it is ensured that piezoelectric ceramic piece can be constrained in the bottom of upper bracket.
As shown in Fig. 4 a, 4b, 4c, lower bracket can be cylinder, and the center point is equipped with a protruding column 131, and bolt 1 passes through should
Protruding column, piezoelectric ceramics 3 are set in protruding column by hollow area 14.Protruding column is mainly used for limiting upper bracket
Position.A protruding circular ring 132 is additionally provided in the middle part of the lower bracket, piezoelectric ceramics 3 is placed on the protruding circular ring.The protruding circular ring with it is upper
Support assorted constrains piezoelectric ceramic piece, and facilitates piezoelectric ceramic piece welding electrode；13 can be equipped with an electrode on lower bracket
Mouth 12 is used for extraction electrode line.
Upper bracket can be equipped with screw hole for cylindrical or cone, centre, and top annulus has installation position-limiting action, upper bracket top
Portion is equipped with an electrode ports 8, is used for extraction electrode line；Bottom annulus constrains piezoelectric ceramic piece with lower bracket cooperation.
The present invention, which applies piezoelectric ceramic piece using upper and lower bracket, to be constrained, by obtaining in different location plated electrode in output end
Obtain different DC voltages.At the resonant frequency fx, which can turn the 220V AC voltage through overdrive circuit
It is changed to the DC voltage of 1~100V, resonance impedance changes less than 10 Ω, output power according to the difference of load at this time.The liter
Pressure piezoelectric transformer structure is simple, size is small, it is simple to manufacture, high-efficient, can be applied in low voltage low power equipment, such as electricity
Brain, phone charger adapter in.
Upper and lower bracket of the present invention can clamp piezoelectric ceramic piece 3, inhibit the effect of vibration.Because vibration can elevate the temperature,
Therefore using has some strength, heat-resisting, wear-resisting material.Meanwhile piezoelectric transformer is electronic component, it is necessary to have certain
Insulating properties, therefore select POM (polyformaldehyde).
The explosion figure of Fig. 1 is assembled, piezoelectric step-up transformer is obtained, piezoelectric ceramics is carried out about using this structure
Beam can realize boosting.Adjusting voltage of the invention has several ways below: (1) upper and lower bracket mentions piezoelectric ceramic vibration
Voltage value can be changed for the position difference of inhibition, fewer to the inhibition of isolation strip, boosting is more obvious.(2) thickness of piezoelectric ceramic piece
Degree is thinner, and output voltage values are higher, and vice versa.(3) overall diameter of piezoelectric ceramic piece is bigger, and voltage value is higher.
In the concrete application of piezoelectric step-up transformer, specific implementation step is as follows:
Specific implementation step is as follows:
1) output voltage, performance number and load resistor value are determined；
2) finite element modelling is carried out according to output voltage, performance number, determines that the distance of upper bracket bottom is taken in isolation to；
3) isolation strip position, piezoelectric ceramic piece thickness and outer diameter are adjusted and determine each part size；
4) part is made, determines potsherd resonant；
5) sample is assembled, output end (i.e. output electrode line 4 and null electrode line 5) connects load R；
6) resonance frequency that electric voltage frequency is adjusted to piezoelectric ceramic piece is connected to by input terminal (i.e. input electrode using control circuit
Line 1 and input electrode line 2)；
7) in measurement of output end output voltage values U, calculated power value P=U^2/R.
In one embodiment of the present of invention, as shown in figure 5, when having piezoelectric ceramic piece maximum gauge φ=40mm, isolation strip
Race diameter R1=34mm, isolation strip inner ring diameter R2=32mm, when the potsherd of hollow area diameter r=8.2mm, by upper branch
The overall diameter of frame bottom is designed as 17.5mm, and interior diameter is designed as 15.5mm；Piezoelectric ceramic piece is carried out about using the above structure
Beam.Load R is connected with output electrode line 4 (bottom surface shares a null electrode) both ends in input electrode line 91=2000 Ω；It utilizes
The frequency of the input voltage of 220V/50Hz is adjusted to different resonance frequencies by control circuit, and inputs different voltages, by the voltage
The input terminal for being linked into input electrode line 9 and null electrode line 5 motivates piezoelectric ceramic piece, and piezoelectric step-up transformer can be obtained
The voltage near resonance arrangement under different frequency, impedance, performance number, as shown in table 1 below.The electricity of piezoelectric step-up transformer
Pressure-frequency curve chart is as shown in Figure 6；The impedance-frequency curve graph of piezoelectric step-up transformer is as shown in Figure 7；Boosting piezoelectricity transformation
The power versus frequency curve graph of device is as shown in Figure 8.
Table 1: the voltage under different frequency near resonance frequency of piezoelectric step-up transformer, impedance, performance number
By taking resonance frequency 80kHz as an example, input voltage is about 120V at this time, which is linked into 9 He of input electrode line
The input terminal of null electrode line 5 motivates piezoelectric ceramic piece.It is tested, be can be obtained using voltage of the multimeter to the both ends R
Voltage value is about 1198V, so power at this time is the calculating of P=U^2/R formula, obtains P1=1198*1198/2000=
711.12W, and impedance at this time is about 11.98 Ω.
As it can be seen that at the resonant frequency fx, piezoelectric step-up transformer of the invention can be by the 220V alternating current through overdrive circuit
Pressure is converted to the DC voltage of 500~2000V, and resonance impedance is about 10 Ω at this time, and output power becomes according to the difference of load
Change.The piezoelectric step-up transformer structure is simple, size is small, it is simple to manufacture, high-efficient, can be in kinescope, radar
It is applied in the high-tension apparatuses such as display tube, ion generator.
Protection content of the invention is not limited to above embodiments, and those skilled in the art is by reading explanation of the invention
Book and to structure and packaging method of the invention carry out various modification and variations without departing from the spirit and scope of the present invention appoint
What equivalent transformation, all are covered by the claims of the invention.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811379992.8A CN109360886A (en) | 2018-11-20 | 2018-11-20 | Step-up piezoelectric transformer and step-up method |
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| CN201811379992.8A CN109360886A (en) | 2018-11-20 | 2018-11-20 | Step-up piezoelectric transformer and step-up method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1206206A (en) * | 1997-07-10 | 1999-01-27 | 三井化学株式会社 | Piezoelectric substrate supporting structure for piezoelectric transformer and piezoelectric transformer provided therewith |
| JPH11354855A (en) * | 1998-06-08 | 1999-12-24 | Tokin Corp | Multilayer piezoelectric transformer |
| CN1373524A (en) * | 2001-01-05 | 2002-10-09 | 香港理工大学 | Piezoelectric transformer |
| CN1551381A (en) * | 2003-05-16 | 2004-12-01 | ���µ�����ҵ��ʽ���� | Piezoelectric transducer, power supply circuit and lighting device using the same |
| CN106159080A (en) * | 2016-08-01 | 2016-11-23 | 陕西师范大学 | There is the radial direction vibrating piezoelectric ceramic transformer of multi output end |
| CN108470822A (en) * | 2018-05-17 | 2018-08-31 | 南京溧水得瑞微型电机厂 | A kind of annular groove adjusts the pre-fastening structure of height |
-
2018
- 2018-11-20 CN CN201811379992.8A patent/CN109360886A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1206206A (en) * | 1997-07-10 | 1999-01-27 | 三井化学株式会社 | Piezoelectric substrate supporting structure for piezoelectric transformer and piezoelectric transformer provided therewith |
| JPH11354855A (en) * | 1998-06-08 | 1999-12-24 | Tokin Corp | Multilayer piezoelectric transformer |
| CN1373524A (en) * | 2001-01-05 | 2002-10-09 | 香港理工大学 | Piezoelectric transformer |
| CN1551381A (en) * | 2003-05-16 | 2004-12-01 | ���µ�����ҵ��ʽ���� | Piezoelectric transducer, power supply circuit and lighting device using the same |
| CN106159080A (en) * | 2016-08-01 | 2016-11-23 | 陕西师范大学 | There is the radial direction vibrating piezoelectric ceramic transformer of multi output end |
| CN108470822A (en) * | 2018-05-17 | 2018-08-31 | 南京溧水得瑞微型电机厂 | A kind of annular groove adjusts the pre-fastening structure of height |
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