CN106876574A - A kind of array piezoelectric transformer - Google Patents
A kind of array piezoelectric transformer Download PDFInfo
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- CN106876574A CN106876574A CN201710123318.2A CN201710123318A CN106876574A CN 106876574 A CN106876574 A CN 106876574A CN 201710123318 A CN201710123318 A CN 201710123318A CN 106876574 A CN106876574 A CN 106876574A
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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
Abstract
The invention discloses a kind of array piezoelectric transformer, some narrow boards shape piezoelectrics arranged in parallel are connected with each other by side connector on width, constitute piezoelectricity volume array；Outer surface on piezoelectrics thickness direction is formed with input electrode and output electrode, is connected with each other and draws external electrode by connecting the connection electrode of external surface respectively；By setting the connected mode of adj acent piezoelectric body input electrode or output electrode, piezoelectricity volume array input electrode or output electrode are capable of achieving in parallel and serial.The present invention is using the design of array piezoelectric transformer, manufacture craft is simple, in the case where piezoelectric transformer size is extended, keep piezoelectrics energy-conserving character, reduce electrode lay-out complexity, realize lifting/voltage reducing than adjustable using the parallel/serial mode of electrode simultaneously, and increase piezoelectric transformer surface area being conducive to radiating.
Description
Technical field
The present invention relates to piezoelectric transformer field, specifically a kind of array piezoelectric transformer.
Background technology
The world today, oneself strides forward the information age of mobile internet to human society, and electronic product is with unprecedented speed
Spend and develop to miniaturization, lightweight and integrated direction, this require the basic component for constituting electronic product have small volume,
It is lightweight, energy-efficient, safe and reliable, the features such as be easily integrated.
Transformer is widely used basic component in electronic product, and traditional electromagnetic transformers are due to structure, material
Etc. aspect the reason for so that existing product is difficult to meet the design requirement of efficient small, have become restriction electronic product it is small
One of biggest obstacle of type.Piezoelectric transformer is intercoupled and circuit with mechanical oscillation as medium by two mechanical parts
Mechanical electric coupling between the piezoceramic resonance body of part mutually insulated, realize input, between output voltage or electric current
Isolation and convert, there is small volume, efficiency high, without electromagnetic interference.Since the Rosen in the U.S. in 1954 proposes that piezoelectricity becomes
Since depressor concept, the piezoelectric transformer of different materials, the vibration shape and size is developed in succession, there is more next in electronic product
More it is widely applied prospect.
The factors such as energy conversion power and material property, physical dimension, the working frequency of piezoelectric transformer are relevant.
In the case that material property determines, piezoelectric transformer size is bigger, and the resonant frequency of the specific vibration shape is lower, influence energy conversion work(
Rate, and working frequency is improved, generally requiring to select the vibration shape of high-order, this proposes higher to electrode lay-out, device radiating etc.
It is required that.Mutual restricting relation between physical dimension and working frequency, have impact on the performance of piezoelectric transformer material property.
The content of the invention
It is an object of the invention to provide a kind of array piezoelectric transformer, with solving prior art piezoelectric transformer technology
The problems existed by the mutual restricting relation between physical dimension and working frequency.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of array piezoelectric transformer, it is characterised in that：Piezoelectrics including at least two narrow boards shapes, each piezoelectrics left side,
Right edge is fore-and-aft direction for side long is length direction, and the forward and backward side of each piezoelectrics is that width is left and right for broadside
Direction, multiple piezoelectrics formation array arranged in parallel successively in the width direction, by direction from front to back, two neighboring piezoelectrics it
Between be connected with each other by the inside connector at side a quarter long and 3/4ths length, it is left for the piezoelectrics of leftmost
At side side a quarter long and 3/4ths length, and the piezoelectrics of rightmost its right side side a quarters long and 3/4ths
External connection body is connected at length, so that piezoelectricity volume array is constituted, the upper and lower surface first half difference of each piezoelectrics
Be coated with input electrode, the upper and lower surface of each piezoelectrics is latter half of to be coated with output electrode respectively, input electrode and output electrode it
Between there is the space for being enough to realize insulation, the upper and lower surface of internal connector and external connection body is selectively coated with connection electricity
Pole, the outside of each external connection body is coated with external electrode respectively.
The internal upper and lower surface of connector of multiple at a quarter length in side long is coated with connection electrode respectively, adjacent
Plate the company for setting in inside connector upper surface between the input electrode of piezoelectrics upper surface by a quarter extension position in side long
Receiving electrode is sequentially connected, and the inside between the input electrode of adj acent piezoelectric body lower surface by a quarter extension position in side long connects
The connection electrode that the plating of junctor lower surface sets is sequentially connected, in the external connection body of a quarter extension position in side long, one of them
The external electrode that external connection body upper surface is coated with connection electrode, and the external connection body passes through external connection body upper surface
Connection electrode is connected with the input electrode of respective side piezoelectrics upper surface；Another external connection body lower surface is coated with connection electricity
Connection electrode and respective side piezoelectrics following table that external electrode on pole, and the external connection body passes through external connection body lower surface
The input electrode connection in face, constitutes the input in parallel of piezoelectricity volume array.
The internal upper and lower surface of connector of multiple at the length of side long 3/4ths is alternately coated with connection electrode, adjacent
Alternately plate the company for setting in the upper and lower surface of inside connector between the output electrode of piezoelectrics by the extension position of side long 3/4ths
Receiving electrode is alternately connected, and is connected with each immediate internal connector in the external connection body of the extension position of side long 3/4ths
Upper surface or lower surface plating that surface where electrode is staggered are provided with the external connection at connection electrode, and the length of side long 3/4ths
The output electrode on the connection electrode surface corresponding with respective side piezoelectrics that the external electrode on body passes through external connection body surface face connects
Connect, constitute the series connection output of piezoelectricity volume array.
A kind of described array piezoelectric transformer, it is characterised in that：Input electrode on the piezoelectrics can be set to string
Connection input, output electrode can also be set to Parallel opertation.
A kind of described array piezoelectric transformer, it is characterised in that：What the piezoelectrics and inside and outside portion's connector were constituted
Piezoelectricity volume array is cut by single piezoelectric ceramic piece and formed.
A kind of described array piezoelectric transformer, it is characterised in that：It is defeated that the piezoelectric ceramic piece upper and lower surface plating sets
Enter the connection electrode in electrode, output electrode, and inside and outside portion's connector, be by removing piezoelectric ceramic piece upper and lower surface
Conductive specific part realizes mutually insulated.
Compared with the prior art, beneficial effects of the present invention are embodied in：
Piezoelectric transformer is designed using array, and in the case where piezoelectric transformer size is extended, piezoelectrics keep work higher
Working frequency reduces the complexity of electrode lay-out without using high order mode.
Piezoelectric transformer is designed using array, and the input electrode or output electrode between piezoelectrics can neatly using simultaneously
The connected modes such as connection, series connection, lifting/voltage reducing is than adjustable.
Piezoelectric transformer is designed using array, increases the surface area of piezoelectric transformer, is conducive to alleviating heat dissipation problem,
Improve job stability.
Brief description of the drawings
Fig. 1 is array piezoelectric transformer parallel-serial axonometric schematic diagram of the present invention.
Fig. 2 be array piezoelectric transformer of the present invention simultaneously-axonometric schematic diagram in parallel.
Fig. 3 is array piezoelectric transformer input electrode parallel connection generalized section of the present invention.
Fig. 4 is array piezoelectric transformer output electrode series connection generalized section of the present invention.
Specific embodiment
As shown in Figure 1 and Figure 2, a kind of array piezoelectric transformer, including three piezoelectrics of narrow boards shape 1, each piezoelectrics
1 left and right side is fore-and-aft direction for side long is length direction, and the forward and backward side of each piezoelectrics 1 is that width is for broadside
Left and right directions, three piezoelectrics 1 formation array arranged in parallel successively in the width direction, by direction from front to back, two neighboring pressure
It is connected with each other by the inside connector 2 at side a quarter long and 3/4ths length between electric body 1, the pressure of leftmost
At its left side side a quarter long of electric body 1 and 3/4ths length, and the piezoelectrics 1 of rightmost its right side side a quarters long
With external connection body 3 is connected at 3/4ths length, so as to constitute piezoelectricity volume array, the upper and lower table of each piezoelectrics 1
Half portion is coated with input electrode 4 respectively in front, and the upper and lower surface of each piezoelectrics is latter half of to be coated with output electrode 5, input electricity respectively
There is the upper and lower surface in the space for being enough to realize insulation, internal connector 2 and external connection body 3 between pole 4 and output electrode 5
Connection electrode 6 is selectively coated with, the outside of each external connection body 3 is coated with external electrode 7 respectively.
As shown in figure 3, the internal opsition dependent of connector 2 be divided into the inside connector 2.1 at a quarter long and it is long while four
Inside connector 2.2 at/tri- length, two upper and lower tables of internal connector 2.1 at a quarter length in side long
Face is coated with connection electrode 6.1,6.2 respectively.4 points of the input electrode of each piezoelectrics is the input electrode 4.1 and following table of upper surface
The input electrode 4.2 in face.By the interior of a quarter extension position in side long between the input electrode 4.1 of adj acent piezoelectric body upper surface
The connection electrode 6.1 that the plating of the upper surface of portion's connector 2.1 sets is sequentially connected, between the input electrode 4.2 of adj acent piezoelectric body lower surface
The connection electrode 6.2 for setting is plated by the lower surface of inside connector 2.1 of a quarter extension position in side long to be sequentially connected.
The opsition dependent of external connection body 3 be divided into the external connection body 3.1 at a quarter long and it is long while 3/4ths length
The external connection body 3.2 at place.By direction from left to right, the upper table of external connection body 3.1 at a quarter length in side long of the leftmost side
Face is coated with connection electrode 6.3, and the external connection body lower surface at a quarter length in side long of the rightmost side is coated with connection electrode 6.4.
External electrode 7.1 wherein on the external connection body 3.1 of leftmost side a quarter extension position in side long passes through the external connection body
The connection electrode 6.3 of 3.1 upper surfaces is connected with the input electrode 4.1 of respective side piezoelectrics upper surface；Rightmost side side four long/
The connection electrode that external electrode 7.2 on the external connection body 3.1 of one extension position passes through the lower surface of external connection body 3.1
6.4 are connected with the input electrode 4.2 of respective side piezoelectrics lower surface, constitute the input in parallel of piezoelectricity volume array.
As shown in figure 4, two internal upper and lower surfaces of connector 2.2 being located at the length of side long 3/4ths are alternately coated with
Connection electrode 6.5,6.6, i.e., by direction from left to right, the following table of inside connector 2.2 at first length of side long 3/4ths
Face is provided with connection electrode 6.6 and upper surface does not set connection electrode, the inside connector 2.2 at second length of side long 3/4ths
Upper surface is provided with connection electrode 6.5 and lower surface does not set connection electrode, is analogized from left to right with this.The output electricity of each piezoelectrics
5 points of pole is the output electrode 5.1 and the output electrode 5.2 of lower surface of upper surface.Pass through between the output electrode 5 of adj acent piezoelectric body
Alternately plate the connection electrode 6.5,6.6 for setting and alternately connect in the upper and lower surface of inside connector 2.2 of the extension position of side long 3/4ths
Connect.I.e. by direction from left to right, first output electrode 5.2 of the lower surface of piezoelectrics 1 is grown by first side long 3/4ths
The connection electrode 6.6 for spending the lower surface of inside connector 2.2 of position connects with the output electrode 5.2 of second lower surface of piezoelectrics 1
Connect, the output electrode 5.1 of the upper surface of the second piezoelectrics 1 is by second inside connector of the extension position of side long 3/4ths
The connection electrode 6.5 of 2.2 upper surfaces is connected with the output electrode 5.1 of the 3rd upper surface of piezoelectrics 1, with this class from left to right
Push away.
It is long in the external connection body 3.2 of 3/4ths extension positions with each it is immediate long while 3/4ths length position
The upper surface or lower surface plating that surface where the connection electrode of inside connector 2.2 put is staggered are provided with connection electrode.Press from a left side
To right direction, the lower surface of leftmost side inside connector 2.2 is provided with connection electrode 6.6 and upper surface does not set connection electrode, therefore
The extension position external connection body 3.2 of side long 3/4ths with the leftmost side inside immediate leftmost side of connector 2.2 is upper
Surface is coated with connection electrode 6.7, and the upper surface of the rightmost side extension position of side 3/4ths inside connector 2.2 long is coated with connection electricity
Pole 6.5 and lower surface do not set connection electrode, thus with the external connection body of the rightmost side inside immediate rightmost side of connector 2.2
3.2 is to be coated with connection electrode 6.8 in lower surface.External electrode on external connection body 3.2 is by the surface of external connection body 3.2
Connection electrode 6.7,6.8 is connected with the output electrode on the corresponding surface of respective side piezoelectrics 1, and the series connection for constituting piezoelectricity volume array is defeated
Go out.Connection electrode 6.7 and the leftmost side of the external electrode 7.3 by itself upper surface i.e. on the external connection body 3.2 of the leftmost side
The output electrode 5.1 of the upper surface of piezoelectrics 1 is connected, and external electrode 7.4 passes through itself following table on the external connection body 3.2 of the rightmost side
The connection electrode 6.8 in face is connected with the output electrode 5.2 of the lower surface of piezoelectrics 1 of the rightmost side.
The piezoelectricity volume array that piezoelectrics 1 and inside and outside portion's connector 2,3 are constituted is cut by single piezoelectric ceramic piece and formed.
Input electrode 4, output electrode 5 that the plating of piezoelectric ceramic piece upper and lower surface sets, and on inside and outside portion's connector 2,3
Connection electrode 6, is to realize mutually insulated by removing the conductive specific part of piezoelectric ceramic piece upper and lower surface.
Specific work process and principle：
The left and right external electrode 7.1 of the input electrode 4 of piezoelectrics 1,7.2 two ends connect input circuit and apply AC-input voltage,
The frequency of driving voltage is the resonant frequency of the second order longitudinal extension of piezoelectrics 1 vibration, the portion of the covering of input electrode 4 of piezoelectrics 1
Divide and mechanical vibrational energy is converted electrical energy into by inverse piezoelectric effect, the part of the covering of output electrode 5 of piezoelectrics 1 passes through positive piezoelectricity
Mechanical vibrational energy is converted into electric energy by effect, and the left and right external electrode 7.3 of the output electrode 5 of piezoelectrics 1,7.4 two ends are exchanged
Output voltage simultaneously connects output circuit for load supplying.
Claims (4)
1. a kind of array piezoelectric transformer, it is characterised in that：Piezoelectrics including at least two narrow boards shapes, each piezoelectrics
Left and right side is fore-and-aft direction for side long is length direction, and the forward and backward side of each piezoelectrics is that width is a left side for broadside
Right direction, multiple piezoelectrics formation array arranged in parallel successively in the width direction, by direction from front to back, two neighboring piezoelectrics
Between be connected with each other by the inside connector at side a quarter long and 3/4ths length, the piezoelectrics of leftmost its
At left side side a quarter long and 3/4ths length, and its right side side a quarter long of the piezoelectrics of rightmost and four/
External connection body is connected at three length, so that piezoelectricity volume array is constituted, the upper and lower surface first half of each piezoelectrics
Input electrode is not coated with, the upper and lower surface of each piezoelectrics is latter half of to be coated with output electrode, input electrode and output electrode respectively
Between there is the space for being enough to realize insulation, the upper and lower surface of internal connector and external connection body is selectively coated with connection
Electrode, the outside of each external connection body is coated with external electrode respectively, and the multiple at a quarter length in side long is internal to be connected
The upper and lower surface of junctor is coated with connection electrode respectively, by side a quarter long between the input electrode of adj acent piezoelectric body upper surface
The inside connector upper surface connection electrode that sets of plating of extension position is sequentially connected, the input electrode of adj acent piezoelectric body lower surface it
Between the connection electrode for setting plated by the inside connector lower surface of a quarter extension position in side long be sequentially connected, side long four/
In the external connection body of one extension position, one of external connection body upper surface is coated with connection electrode, and the external connection body
On external electrode be connected with the input electrode of respective side piezoelectrics upper surface by the connection electrode of external connection body upper surface；
Another external connection body lower surface is coated with the external electrode in connection electrode, and the external connection body by under external connection body
The connection electrode on surface is connected with the input electrode of respective side piezoelectrics lower surface, constitutes the input in parallel of piezoelectricity volume array, position
The upper and lower surfaces of the internal connectors of multiple at the length of side long 3/4ths are alternately coated with connection electrode, adj acent piezoelectric body it is defeated
Go out between electrode alternately to plate the connection electrode for setting by the upper and lower surface of inside connector of the extension position of side long 3/4ths and replace
Connection, with each table where immediate internal connector connection electrode in the external connection body of the extension position of side long 3/4ths
The upper surface or lower surface plating that face is staggered are provided with external on the external connection body at connection electrode, and the length of side long 3/4ths
The output electrode on the connection electrode surface corresponding with respective side piezoelectrics that electrode passes through external connection body surface face is connected, and constitutes piezoelectricity
The series connection output of volume array.
2. a kind of array piezoelectric transformer according to claim 1, it is characterised in that：Input electricity on the piezoelectrics
Pole can be set to series connection input, and output electrode can also be set to Parallel opertation.
3. a kind of array piezoelectric transformer according to claim 1, it is characterised in that：The piezoelectrics and inside and outside portion
The piezoelectricity volume array that connector is constituted is cut by single piezoelectric ceramic piece and formed.
4. a kind of array piezoelectric transformer according to claim 2, it is characterised in that：Following table on the piezoelectric ceramic piece
Input electrode, output electrode that face plating sets, and the connection electrode on inside and outside portion's connector, are by removing piezoelectric ceramics
The conductive specific part of piece upper and lower surface realizes mutually insulated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710123318.2A CN106876574B (en) | 2017-03-03 | 2017-03-03 | A kind of array piezoelectric transformer |
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| CN201710123318.2A CN106876574B (en) | 2017-03-03 | 2017-03-03 | A kind of array piezoelectric transformer |
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| CN106876574B CN106876574B (en) | 2019-05-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111064387A (en) * | 2020-01-06 | 2020-04-24 | 南方科技大学 | Adaptive energy harvester |
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| CN102097581A (en) * | 2010-12-06 | 2011-06-15 | 中国科学技术大学 | Piezoelectric transformer and heat sink thereof |
| WO2012136396A1 (en) * | 2011-04-05 | 2012-10-11 | Robert Bosch Gmbh | Piezo transformer, method for producing a piezo transformer and inverter having a piezo transformer |
| US20130134838A1 (en) * | 2011-11-28 | 2013-05-30 | Qualcomm Mems Technologies, Inc. | Piezoelectric mems transformer |
| CN204538088U (en) * | 2012-11-13 | 2015-08-05 | 株式会社村田制作所 | Piezoelectric transformer |
| CN105405959A (en) * | 2015-10-29 | 2016-03-16 | 上海师范大学 | Ternary system relaxation ferroelectric monocrystal piezoelectric transformer having high power density |
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2017
- 2017-03-03 CN CN201710123318.2A patent/CN106876574B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097581A (en) * | 2010-12-06 | 2011-06-15 | 中国科学技术大学 | Piezoelectric transformer and heat sink thereof |
| WO2012136396A1 (en) * | 2011-04-05 | 2012-10-11 | Robert Bosch Gmbh | Piezo transformer, method for producing a piezo transformer and inverter having a piezo transformer |
| US20130134838A1 (en) * | 2011-11-28 | 2013-05-30 | Qualcomm Mems Technologies, Inc. | Piezoelectric mems transformer |
| CN204538088U (en) * | 2012-11-13 | 2015-08-05 | 株式会社村田制作所 | Piezoelectric transformer |
| CN105405959A (en) * | 2015-10-29 | 2016-03-16 | 上海师范大学 | Ternary system relaxation ferroelectric monocrystal piezoelectric transformer having high power density |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111064387A (en) * | 2020-01-06 | 2020-04-24 | 南方科技大学 | Adaptive energy harvester |
| CN111064387B (en) * | 2020-01-06 | 2020-11-24 | 南方科技大学 | Adaptive energy harvester |
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