CN109545952A - It is depressured piezoelectric transformer and voltage reduction method - Google Patents
It is depressured piezoelectric transformer and voltage reduction method Download PDFInfo
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- 238000009434 installation Methods 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
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- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
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- 230000006837 decompression Effects 0.000 description 32
- 238000000605 extraction Methods 0.000 description 6
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- 238000011161 development Methods 0.000 description 3
- 230000003276 anti-hypertensive effect Effects 0.000 description 2
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- H—ELECTRICITY
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- 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
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Abstract
本发明公开了一种降压压电变压器及降压方法，该降压压电变压器包括上支架、压电陶瓷片和下支架，压电陶瓷片通过上下支架对压电陶瓷片施加压力；压电陶瓷片包括4个区域，由内而外依次为空心区域、内圈区域、隔离带区域、外圈区域；空心区域为上下支架连接的安装区域；内圈区域和外圈区域各镀有两个银电极；内圈区域的上、下两面各镀有一个输出电极，外圈区域的上、下两面各镀有一个输入电极，每个输入电极、每个输出电极均分别引出一条电极线。本发明的降压压电变压器结构简单，加工制备容易；本发明利用上下支架对压电陶瓷片施加约束，通过在不同位置镀电极在输出端获得不同电压值，而经整流电路整流后可输出不同直流电压。
The invention discloses a step-down piezoelectric transformer and a step-down method. The step-down piezoelectric transformer comprises an upper support, a piezoelectric ceramic sheet and a lower support, and the piezoelectric ceramic sheet applies pressure to the piezoelectric ceramic sheet through the upper and lower supports; The electric ceramic sheet includes 4 areas, which are hollow area, inner ring area, isolation zone area, and outer ring area from inside to outside; the hollow area is the installation area where the upper and lower brackets are connected; the inner ring area and the outer ring area are each plated with two Each of the upper and lower sides of the inner ring area is plated with an output electrode, and the upper and lower sides of the outer ring area are plated with an input electrode, and each input electrode and each output electrode respectively lead out an electrode line. The step-down piezoelectric transformer of the invention has a simple structure and is easy to process and prepare; the invention uses the upper and lower brackets to impose constraints on the piezoelectric ceramic sheets, obtains different voltage values at the output end by plating electrodes at different positions, and can output after being rectified by the rectifier circuit different DC voltages.
Description
Technical field
The invention belongs to ceramic material fields, and in particular to a kind of decompression piezoelectric transformer and voltage reduction method.
Background technique
Currently, electromagnetic transformers are the transformer being most widely used in the market, this have benefited from its relatively high technology at
Ripe degree and market dependency degree.With the development of science and technology, electronic product is gradually towards micromation, integrated direction development, electricity
How magnetic transformer finds high-performance, substitutability transformer since its volume is big, weight is big, inflammable and electromagnetic interference is serious
Just it is paid high attention to.Piezoelectric transformer comes into being by its excellent performance.Compared with traditional electromagnetic transformers, tool
Have: small in size, light-weight, high temperature resistant, resistance wear, electromagnetism interference, high conversion efficiency and has short-circuit automatic protection functions etc.
Significant advantage.C.A.Rosen has most invented ROSE type piezoelectric step-up transformer earlier than 1950s, but at that time due to being confined to material
It is unable to satisfy practical application request, piezoelectric transformer step-up ratio obtained is low, output power is small, therefore such piezoelectric transformer is not
Enough concerns can be obtained.In recent years, the invention of PZT piezoelectric ceramics and the progress of preparation process have greatly pushed boosting piezoelectricity to become
Depressor technological innovation, currently, PZT piezoelectric ceramic step-up transformer is in kinescope, tonotron, ion generator etc.
It is applied in high-tension apparatus.
Compared with piezoelectric step-up transformer, it is depressured the research and development starting evening of piezoelectric transformer, theory is developed so far and grinds
Study carefully very few.Before the nineties in last century, small-power, the market demand for being depressured piezoelectric transformer of small size are few.After the nineties, letter
It is rapid to cease industry development, has expedited the emergence of the demand for low-voltage, small-power output equipment, starts to greatly develop decompression pressure both at home and abroad
Piezoelectric transformer.Currently, decompression piezoelectric transformer is applied in the power supply adaptor of computer, mobile phone, volume has greatly been embodied
Small, light-weight advantage.However, China starts to walk to the research of decompression piezoelectric transformer compared with the developed countries such as American-European Japan and Korea S
Later and the mechanism of research is also seldom, therefore, it is extremely urgent to develop the decompression piezoelectric transformer haveing excellent performance.
Summary of the invention
The invention discloses a kind of decompression piezoelectric transformer and voltage reduction methods, are applied using upper and lower bracket to piezoelectric ceramic piece
Constraint, by obtaining different DC voltages in output end in different location plated electrode.At the resonant frequency fx, the decompression piezoelectricity transformation
220V AC voltage through overdrive circuit can be converted to the DC voltage of 1~100V by device, and resonance impedance is less than 10 Ω at this time,
Output power changes according to the difference of load.Decompression piezoelectric transformer structure is simple, size is small for this, it is simple to manufacture, effect
Rate is high, can be applied in low voltage low power equipment, as computer, phone charger adapter in.
A kind of decompression piezoelectric transformer of the present invention applies piezoelectric ceramic piece using upper and lower bracket and constrains, passes through
Different voltages are obtained in output end in different location plated electrode, and exportable difference DC voltage after rectified circuit rectifies.
A kind of decompression piezoelectric transformer, including upper bracket, piezoelectric ceramic piece and lower bracket are provided, piezoelectric ceramic piece passes through upper
Lower bracket applies pressure 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；Inner circle area and outer collar region are respectively plated there are two silver electrode；Inner ring
The upper and lower faces in region are respectively coated with an output electrode, and the upper and lower faces of outer collar region are respectively coated with an input electrode, each
Input electrode, each output electrode draw 1 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 voltage reduction methods for being depressured piezoelectric transformer, decompression piezoelectricity by adopting the above technical scheme
Transformer constrains piezoelectric ceramic piece, realizes decompression by adjusting the diameter of upper bracket bottom or the position of isolation strip.
The present invention also provides a kind of voltage reduction methods for being depressured piezoelectric transformer, decompression piezoelectricity by adopting the above technical scheme
Transformer constrains piezoelectric ceramic piece, reduces voltage value by adjusting the thickness of piezoelectric ceramic piece.
The present invention also provides a kind of voltage reduction methods for being depressured piezoelectric transformer, decompression piezoelectricity by adopting the above technical scheme
Transformer constrains piezoelectric ceramic piece, reduces voltage value by adjusting the width of isolation strip.
The present invention also provides a kind of voltage reduction methods for being depressured piezoelectric transformer, decompression piezoelectricity by adopting the above technical scheme
Transformer constrains piezoelectric ceramic piece, reduces voltage by adjusting the overall diameter of piezoelectric ceramic piece.
Beneficial effects of the present invention: decompression piezoelectric 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.
It is reduced by the diameter of adjusting upper bracket bottom or the position of isolation strip or the thickness by suitably reducing piezoelectric ceramic piece
Voltage value or the width by increasing isolation strip reduce voltage value or the appropriate overall diameter for increasing piezoelectric ceramic piece come
Voltage is reduced to realize different decompressions.Antihypertensive effect is obvious and decompression range is big (1~100V).
Detailed description of the invention
Fig. 1 is the explosion figure that the embodiment of the present invention is depressured piezoelectric transformer；
Fig. 2 a is decompression piezoelectric 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 decompression piezoelectric transformer of embodiment 1；
Fig. 7 is the impedance-frequency curve graph of the decompression piezoelectric transformer of embodiment 1；
Fig. 8 is the power versus frequency curve graph of the decompression piezoelectric transformer of embodiment 1.
Specific embodiment
The present invention will be further explained with reference to the examples below.
Decompression piezoelectric 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, decompression piezoelectric 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 includes 4 regions, from inside to outside successively
For hollow area 14, inner circle area 15, the isolation outer collar region 16 in region 10；Hollow area 14 is the installation of upper and lower bracket connection
Region；Respectively there are two silver electrodes for plating for inner circle area 15 and outer collar region 16；Totally four electrodes, centre are separated with area of isolation.It is interior
The upper and lower faces of collar region are respectively coated with an output electrode, and the upper and lower faces of outer collar region are respectively coated with an input electrode, often
A input electrode, each output electrode draw 1 strip electrode line respectively.The output electrode extraction electrode line 9,11 of inner circle area,
The input electrode extraction electrode line 4,5 of outer collar region.
In one embodiment of the present of invention, piezoelectric ceramic piece 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 (for the sky of protrusion
Heart cylinder), bolt 1 passes through the protruding column, and piezoelectric ceramics 3 is set in protruding column by hollow area 14.Protruding column master
It is used to limit upper bracket.A protruding circular ring 132 is additionally provided in the middle part of the lower bracket, piezoelectric ceramics 3 is placed in the protrusion
On annulus.The protruding circular ring constrains piezoelectric ceramic piece with upper bracket cooperation, and facilitates piezoelectric ceramic piece welding electrode；Under
13 are equipped with an electrode ports 12 on bracket, are 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
Different voltages are obtained, and exportable difference DC voltages after rectified circuit rectifies.At the resonant frequency fx, the decompression piezoelectric transformer
220V AC voltage through overdrive circuit can be converted to the DC voltage of 1~100V, resonance impedance is defeated less than 10 Ω at this time
Power changes according to the difference of load out.Decompression piezoelectric transformer structure is simple, size is small for this, manufactures simple, efficiency
Height can be applied in low voltage low power equipment, as computer, 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, decompression piezoelectric transformer is obtained, piezoelectric ceramics is carried out about using this structure
Beam can realize decompression.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, more to the inhibition of isolation strip, decompression is more obvious, and vice versa, therefore can be led to
Realize different decompressions in the position of the diameter or isolation strip that overregulate upper bracket bottom.(2) thickness of piezoelectric ceramic piece is bigger,
Output voltage values are lower, therefore can reduce voltage value by suitably increasing the thickness of piezoelectric ceramic piece.(3) isolation strip is wider,
Antihypertensive effect is more obvious, therefore can reduce voltage value by increasing the width of isolation strip.(4) overall diameter of piezoelectric ceramic piece is got over
Greatly, voltage value is lower, therefore can suitably increase the overall diameter of piezoelectric ceramic piece to reduce voltage.The side of above four kinds of reductions voltage
In formula, it is the most significant that (1) plants effect, and other three kinds can only slightly change voltage value.Therefore, (1) kind mode can be used
It determines substantially voltage value, then is finely adjusted by other three kinds of modes accurately to determine voltage value.
It is depressured in the concrete application of piezoelectric transformer, 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 width, piezoelectric ceramic piece thickness and outer diameter are adjusted and determine each part size；
4) part is made, determines the resonant of potsherd；
5) sample is assembled, output end (i.e. output electrode line 3 and output electrode line 4) 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=30mm, isolation strip
Race diameter R1=19.5mm, isolation strip inner ring diameter R2=17.5mm will when the potsherd of hollow area diameter r=8.2mm
The overall diameter of upper bracket bottom is designed as 17.5mm, and interior diameter is designed as 15.5mm；Using the above structure to piezoelectric ceramic piece into
Row constraint.Load R is connected with 11 both ends of output electrode line in output electrode line 91=100 Ω；Using control circuit by 220V/
The frequency of the input voltage of 50Hz is adjusted to different resonance frequencies, and inputs different voltages, which is linked into input electrode
The input terminal of line 4 and input electrode line 5 motivates piezoelectric ceramic piece, can obtain arranging in resonance for decompression piezoelectric transformer
Voltage, impedance, performance number under neighbouring different frequency, as shown in table 1 below.It is depressured the voltage-frequency curve graph of piezoelectric transformer
As shown in Figure 6；The impedance-frequency curve graph for being depressured piezoelectric transformer is as shown in Figure 7；It is depressured the power versus frequency of piezoelectric transformer
Curve graph is as shown in Figure 8.
Table 1: the voltage under different frequency near resonance arrangement, the impedance, performance number of piezoelectric transformer are depressured
| Frequency F (kHz) | Voltage U (V) | Impedance Z (Ω) | Power P (W) |
| 133 | 1.59111 | 78.6031 | 0.02532 |
| 134 | 1.87483 | 68.7095 | 0.03515 |
| 135 | 2.26345 | 58.6332 | 0.05123 |
| 136 | 2.82709 | 48.3747 | 0.07992 |
| 137 | 3.71437 | 37.9514 | 0.13797 |
| 138 | 5.29772 | 27.4347 | 0.28066 |
| 139 | 8.75274 | 17.1257 | 0.76611 |
| 140 | 17.2424 | 8.96873 | 2.97301 |
| 141 | 13.7458 | 11.6102 | 1.88946 |
| 142 | 7.52145 | 21.9048 | 0.56572 |
| 143 | 5.03473 | 33.7955 | 0.25349 |
| 144 | 3.78948 | 46.3895 | 0.1436 |
| 145 | 3.05217 | 59.5299 | 0.09316 |
| 146 | 2.56701 | 73.1904 | 0.0659 |
| 147 | 2.22431 | 87.3835 | 0.04948 |
By taking resonance frequency 140kHz as an example, input voltage is about 120V at this time, which is linked into 4 He of input electrode line
The input terminal of input electrode line 5 motivates piezoelectric ceramic piece.Using multimeter to R1The voltage at both ends is tested, and can be obtained
It is about 17V to voltage value, so power at this time is P1=17*17/100=2.89W.And impedance at this time is about 9 Ω.
As it can be seen that at the resonant frequency fx, the present invention is depressured piezoelectric transformer can be by the 220V AC voltage through overdrive circuit
The DC voltage of 1~100V is converted to, resonance impedance changes less than 10 Ω, output power according to the difference of load at this time.It should
Decompression 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
Computer, phone charger adapter in.
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 (10)
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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 CN201811379998.5A patent/CN109545952A/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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