JPS63200579A - Piezoelectric transformer - Google Patents
Piezoelectric transformerInfo
- Publication number
- JPS63200579A JPS63200579A JP62034329A JP3432987A JPS63200579A JP S63200579 A JPS63200579 A JP S63200579A JP 62034329 A JP62034329 A JP 62034329A JP 3432987 A JP3432987 A JP 3432987A JP S63200579 A JPS63200579 A JP S63200579A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- electrodes
- input
- output
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010248 power generation Methods 0.000 description 19
- 230000010287 polarization Effects 0.000 description 9
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 7
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、圧電素子板を用いて入力電圧を昇圧する圧電
トランスに関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a piezoelectric transformer that boosts input voltage using a piezoelectric element plate.
〈従来技術〉
圧電素子板に電圧を印加すると、分極方向に延び、この
歪による体積変化に対応して直角方向に縮むという基本
的性質がある。これを利用して、圧電素子板の表裏に入
力電極を形成して、これを駆動部とし、該入力電極から
の電圧印加により圧電素子板を厚み方向に歪ませ、この
歪に伴う直角方向の変位により発電部の圧電素子板に応
力を与えて歪ませ、該発電部の出力電極から入力電圧と
逆位相の電圧を誘起するようにしてなる圧電トランスは
公知である。<Prior Art> When a voltage is applied to a piezoelectric element plate, it has a basic property of extending in the polarization direction and contracting in the right angle direction in response to the change in volume due to this strain. Utilizing this, input electrodes are formed on the front and back sides of the piezoelectric element plate, and these are used as driving parts, and the piezoelectric element plate is distorted in the thickness direction by applying voltage from the input electrodes, and the perpendicular direction due to this distortion is A piezoelectric transformer is known in which a piezoelectric element plate of a power generation section is strained by applying stress to the piezoelectric element plate due to displacement, and a voltage having a phase opposite to the input voltage is induced from an output electrode of the power generation section.
この圧電トランスは特公昭４６−４１０９号。This piezoelectric transformer is designated as Special Publication No. 46-4109.
特公昭４６−７８９１号等に開示されている。It is disclosed in Japanese Patent Publication No. 46-7891.
このものは第３図に示すように、矩形状の圧電基板ａの
半分の表裏面に入力電極す、ｂを形成して、これを駆動
部Ｘとし、他の半分の外端面に出力電極Ｃを形成して、
この半分を発電部ｙとした構成になるものである。As shown in FIG. 3, input electrodes A and B are formed on the front and back surfaces of half of a rectangular piezoelectric substrate a, and this is used as a drive section X, and an output electrode C is formed on the outer end surface of the other half. to form the
This half constitutes the power generation section y.
〈発明が解決しようとする問題点〉
ところで、かかる構成にあっては、矩形状の圧電基板ａ
の駆動部Ｘは厚み方向に分極し、発電部ｙは長手方向に
分極しなければならず、その分極方向が直交関係となっ
て、分極処理が困難となり、圧電トランスの製造に手間
が掛かる。<Problems to be solved by the invention> By the way, in such a configuration, the rectangular piezoelectric substrate a
The drive section X must be polarized in the thickness direction, and the power generation section y must be polarized in the longitudinal direction, and the polarization directions are orthogonal, making polarization difficult and requiring time and effort to manufacture the piezoelectric transformer.
本発明は、一方向の分極処理によって、駆動部と発電部
とを構成することを可能として、分極処理の困難性を是
正し、前記従来欠点を除去した圧電トランスの提供を目
的とするものである。An object of the present invention is to provide a piezoelectric transformer that corrects the difficulty of polarization and eliminates the above-mentioned conventional drawbacks by making it possible to configure a drive section and a power generation section by unidirectional polarization. be.
く問題点を解決するための手段〉
本発明は、厚み方向に分極した円板状圧電基板の表裏面
の中央部分に、夫々円形の入力電極を形成して、この表
裏の入力電極対と、該電極対間の基板部分とで駆動部を
構成し、
該圧電基板の表裏面の前記入力電極の周囲に、周方向に
分離する一〜複数の出力電極を形成して、この表裏の各
出力電極対と、該電極対間の基板部分とで一〜複数の発
電部を構成し、前記各発電部を直列接続して、その誘起
電圧を取出すようにしたことを特徴とするものである。Means for Solving the Problems> The present invention forms circular input electrodes in the center portions of the front and back surfaces of a disc-shaped piezoelectric substrate polarized in the thickness direction, and connects the front and back input electrode pairs to each other. A driving section is configured with a substrate portion between the electrode pair, and one to a plurality of output electrodes separated in the circumferential direction are formed around the input electrode on the front and back surfaces of the piezoelectric substrate, and each output on the front and back surfaces is formed. The present invention is characterized in that the electrode pair and the substrate portion between the electrode pairs constitute one or more power generating sections, and the respective power generating sections are connected in series to extract the induced voltage.
く作用〉
前記入力電極に交番電圧を印加すると、駆動部が厚み方
向に歪み、この歪による体積変化に対応して、圧電基板
の中央部が径方向へ伸縮する。このため、駆動部の周囲
に配置された発電部が径方向から圧縮応力を受け、その
表裏面の出力電極に電圧が誘起される。この各発電部に
発生する電圧は、各発電部が直列接続されているために
、その総和が取出される。Effect> When an alternating voltage is applied to the input electrode, the drive section is distorted in the thickness direction, and the center portion of the piezoelectric substrate expands and contracts in the radial direction in response to the volume change due to this distortion. For this reason, the power generation section disposed around the drive section receives compressive stress from the radial direction, and a voltage is induced in the output electrodes on the front and back surfaces thereof. Since each power generation section is connected in series, the sum of the voltages generated in each power generation section is taken out.
〈実施例〉 第１，２図について本発明の一実施例を説明する。<Example> An embodiment of the present invention will be described with reference to FIGS. 1 and 2.
ここで１は、チタン酸バリウム、ＰＺＴ磁器等の圧電材
料からなる円板状の圧電基板である。この圧電基板ｌは
、分極電極を表裏面に形成して、直流電圧を印加するこ
とにより、第２図破線で示すように厚み方向に分極処理
され、分極後に該電極が除去され、新たに、その表裏面
に、入力電極２．２と複数の出力電極３．３とが形成さ
れる。Here, 1 is a disk-shaped piezoelectric substrate made of a piezoelectric material such as barium titanate or PZT porcelain. This piezoelectric substrate l is polarized in the thickness direction as shown by the broken line in FIG. 2 by forming polarization electrodes on the front and back surfaces and applying a DC voltage. After polarization, the electrodes are removed and a new An input electrode 2.2 and a plurality of output electrodes 3.3 are formed on the front and back surfaces thereof.
前記入力電極２，２は、圧電基板１の中央部で、円形状
に形成され、さらにその周囲で出力電極３．３が周方向
に分離して複数形成される。The input electrodes 2, 2 are formed in a circular shape at the center of the piezoelectric substrate 1, and a plurality of output electrodes 3.3 are formed around the circular shape, separated in the circumferential direction.
而て、表裏の入力電極２．２と、該電極対間の中央の基
板部分１ａとで駆動部Ｘが構成され、該駆動部Ｘの周囲
にあって、表裏の各出力電極３゜３と、該電極対間の周
囲の基板部分１ｂとで複数の発電部ｙが構成される。The driving section , and the surrounding substrate portion 1b between the electrode pairs constitute a plurality of power generation units y.
そして、前記入力電極２，２には、入力側リード線４，
４が接続され（第２図参照）、さらに各出力電極３．３
には、その表面の出力電極３と、裏面の隣接する発電部
ｙの出力電極３とを第１図のように接続用リード線５で
接続して、各発電部ｙは直列状に接続され、そのいずれ
かの発電部ｙの出力電極３，３に電圧取出し用リード線
６．６が接続される。The input electrodes 2, 2 are connected to input side lead wires 4,
4 are connected (see Figure 2), and each output electrode 3.3
In this case, the output electrode 3 on the front surface and the output electrode 3 of the adjacent power generation section y on the back surface are connected with a connecting lead wire 5 as shown in Fig. 1, and each power generation section y is connected in series. , a voltage extraction lead wire 6.6 is connected to the output electrodes 3, 3 of one of the power generation units y.
かかる構成にあって、入力側リード線４，４から入力電
極２，２に交番電圧を印加すると、その電圧の印加に伴
って駆動部Ｘの厚み方向の歪を生じ、これに伴い、第２
図矢線で示すように、該駆動部Ｘの径方向で伸縮を生ず
る。このため、前記発電部ｙは、駆動部Ｘにより径方向
から応力を与えられて、分極方向（厚み方向）に歪み、
これに対応して入力電圧とは逆位相の電圧が誘起される
。In such a configuration, when an alternating voltage is applied from the input side lead wires 4, 4 to the input electrodes 2, 2, the application of the voltage causes distortion in the thickness direction of the drive section
As shown by arrows in the figure, the drive section X expands and contracts in the radial direction. Therefore, the power generating section y is subjected to stress from the radial direction by the driving section X, and is distorted in the polarization direction (thickness direction).
Correspondingly, a voltage having an opposite phase to the input voltage is induced.
そしてリード線５を介して各発電部ｙは直列接続されて
いるから、この各発電部ｙで発生した電圧の総和が取出
し用リード線６，６から取出される。而て、この出力電
圧は、入力電極２．２からの印加電圧よりも昇圧された
ものとなり、トランスとしての機能を発揮することとな
る。Since each power generation section y is connected in series via the lead wire 5, the sum of the voltages generated in each power generation section y is taken out from the lead wires 6, 6. Therefore, this output voltage is higher than the voltage applied from the input electrode 2.2, and functions as a transformer.
前記構成にあって、該出力電圧は発電部ｙの分割数と比
例し、このため、昇圧特性は、出力電極３．３の分割数
を選定することにより随意に調整することが可能となる
。In the above configuration, the output voltage is proportional to the number of divisions of the power generation section y, and therefore the boosting characteristic can be adjusted as desired by selecting the number of divisions of the output electrode 3.3.
尚、前記実施例では、発電部ｙを複数としたものである
が、分割数を一個とし、出力電極３．３を単一として、
発電部ｙを一個のみ設けるようにしてもよい。In the above embodiment, the power generation section y is plural, but the number of divisions is one, and the output electrode 3.3 is single.
Only one power generation section y may be provided.
本考案の特性を調べるために、圧電基板１の直径６ｃｍ
、厚さ４■、入力電極２の直径４ ａｍ 、出力電極３
．３の径方向の幅４ ａｍ 、出力電極３の分割数８．
共振周波数４０ＫＨ２の圧電トランスを形成し、入力側
リード線４，４間に周波数４０ＫＨ２゜５ｖの交番電圧
を印加したところ、リード線６゜６から１００Ｖの交番
電圧を取出すことができた。また、同様の条件で、２５
Ｖの電圧を印加したところ、４２５ｖの電圧を取出すこ
とができた。In order to investigate the characteristics of the present invention, the diameter of the piezoelectric substrate 1 was 6 cm.
, thickness 4 mm, diameter of input electrode 2 4 am, output electrode 3
．． The radial width of the output electrode 3 is 4 am, and the number of divisions of the output electrode 3 is 8.
When a piezoelectric transformer with a resonant frequency of 40KH2 was formed and an alternating voltage of a frequency of 40KH2.5v was applied between the input lead wires 4 and 4, an alternating voltage of 100V could be extracted from the lead wire 6.6. Also, under similar conditions, 25
When a voltage of V was applied, a voltage of 425V could be extracted.
この結果より、本考案のものはトランスとしての機能を
良好に果し得ることが確認された。From this result, it was confirmed that the device of the present invention can function well as a transformer.
〈発明の効果〉
本発明は、上述のように、圧電基板ｌの中央部に入力電
極２．２を形成し、その周囲に出力電極３．３を形成し
て、同一方向に分極した一枚の圧電基板ｌで駆動部Ｘ９
発電部ｙを構成したものであるから、分極処理が極めて
容易であり製造が簡単である。また分割数を変更するこ
とにより、その昇圧特性を適宜に選定できる等の優れた
効果がある。<Effects of the Invention> As described above, the present invention has an input electrode 2.2 formed in the center of a piezoelectric substrate l, an output electrode 3.3 formed around it, and a single sheet polarized in the same direction. Drive unit X9 with piezoelectric substrate l
Since it constitutes the power generation section y, polarization treatment is extremely easy and manufacturing is simple. Furthermore, by changing the number of divisions, there are excellent effects such as the ability to appropriately select the boosting characteristics.
添付図面は本考案の実施例を示し、第１図は斜視図、第
２図は縦断側面図であ・る。また第３図は従来構成の斜
視図である。
１；圧電基板 ２，２；入力電極 ３，３；出力電極
４，４；入力側リード線 ５；接続用リード線 ６，６
：取出し用リード線 Ｘ；駆動部 ｙ；発電部The accompanying drawings show an embodiment of the present invention, with FIG. 1 being a perspective view and FIG. 2 being a longitudinal side view. Further, FIG. 3 is a perspective view of a conventional configuration. 1; Piezoelectric substrate 2, 2; Input electrode 3, 3; Output electrode
4, 4; Input side lead wire 5; Connection lead wire 6, 6
: Lead wire for extraction X; Drive section y; Power generation section
Claims (1)
分に、夫々円形の入力電極を形成して、この表裏の入力
電極対と、該電極対間の基板部分とで駆動部を構成し、 該圧電基板の表裏面の前記入力電極の周囲に、周方向に
分離する一〜複数の出力電極を形成して、この表裏の各
出力電極対と、該電極対間の基板部分とで一〜複数の発
電部を構成し、 前記各発電部を直列接続して、その誘起電圧を取出すよ
うにしたことを特徴とする圧電トランス。[Claims] Circular input electrodes are formed in the center portions of the front and back surfaces of a disk-shaped piezoelectric substrate polarized in the thickness direction, and the pair of input electrodes on the front and back sides and the substrate portion between the pair of electrodes. forming a driving unit, forming one to a plurality of output electrodes separated in the circumferential direction around the input electrodes on the front and back surfaces of the piezoelectric substrate, and connecting each pair of output electrodes on the front and back sides and between the pair of electrodes. A piezoelectric transformer, comprising one or more power generating sections, each of which is connected in series to extract the induced voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62034329A JPS63200579A (en) | 1987-02-16 | 1987-02-16 | Piezoelectric transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62034329A JPS63200579A (en) | 1987-02-16 | 1987-02-16 | Piezoelectric transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63200579A true JPS63200579A (en) | 1988-08-18 |
Family
ID=12411113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62034329A Pending JPS63200579A (en) | 1987-02-16 | 1987-02-16 | Piezoelectric transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63200579A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0477002A2 (en) * | 1990-09-18 | 1992-03-25 | Fujitsu Limited | Piezoelectric transformer |
| US5371430A (en) * | 1991-02-12 | 1994-12-06 | Fujitsu Limited | Piezoelectric transformer producing an output A.C. voltage with reduced distortion |
| US5424602A (en) * | 1991-02-12 | 1995-06-13 | Fujitsu Limited | Piezoelectric transformer showing a reduced input impedance and step-up/step-down operation for a wide range of load resistance |
| EP0854564A2 (en) * | 1997-01-16 | 1998-07-22 | Nec Corporation | AC/CD converter with a piezoelectric transformer |
| KR100388264B1 (en) * | 2000-05-03 | 2003-06-19 | 김희진 | High efficiency piezo electric transformer by using multisector and parallel poling direction method within one-body |
| JP2011029239A (en) * | 2009-07-21 | 2011-02-10 | Fujitsu Ltd | Piezoelectric power generation module, method of manufacturing the same, and piezoelectric generator |
| WO2012105522A1 (en) * | 2011-02-01 | 2012-08-09 | パナソニック株式会社 | Power generating device and power generating module using same |
-
1987
- 1987-02-16 JP JP62034329A patent/JPS63200579A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0477002A2 (en) * | 1990-09-18 | 1992-03-25 | Fujitsu Limited | Piezoelectric transformer |
| US5229680A (en) * | 1990-09-18 | 1993-07-20 | Fujitsu Limited | Piezoelectric transformer using single crystal of linbo3 |
| US5371430A (en) * | 1991-02-12 | 1994-12-06 | Fujitsu Limited | Piezoelectric transformer producing an output A.C. voltage with reduced distortion |
| US5424602A (en) * | 1991-02-12 | 1995-06-13 | Fujitsu Limited | Piezoelectric transformer showing a reduced input impedance and step-up/step-down operation for a wide range of load resistance |
| EP0854564A2 (en) * | 1997-01-16 | 1998-07-22 | Nec Corporation | AC/CD converter with a piezoelectric transformer |
| EP0854564A3 (en) * | 1997-01-16 | 1999-09-22 | Nec Corporation | AC/CD converter with a piezoelectric transformer |
| KR100388264B1 (en) * | 2000-05-03 | 2003-06-19 | 김희진 | High efficiency piezo electric transformer by using multisector and parallel poling direction method within one-body |
| JP2011029239A (en) * | 2009-07-21 | 2011-02-10 | Fujitsu Ltd | Piezoelectric power generation module, method of manufacturing the same, and piezoelectric generator |
| WO2012105522A1 (en) * | 2011-02-01 | 2012-08-09 | パナソニック株式会社 | Power generating device and power generating module using same |
| JP2012160620A (en) * | 2011-02-01 | 2012-08-23 | Panasonic Corp | Power generating device and power generating module using the same |
| KR101366735B1 (en) * | 2011-02-01 | 2014-02-24 | 파나소닉 주식회사 | Power generating device and power generating module using same |
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