JP3018882B2 - Piezoelectric transformer - Google Patents
Piezoelectric transformerInfo
- Publication number
- JP3018882B2 JP3018882B2 JP5349560A JP34956093A JP3018882B2 JP 3018882 B2 JP3018882 B2 JP 3018882B2 JP 5349560 A JP5349560 A JP 5349560A JP 34956093 A JP34956093 A JP 34956093A JP 3018882 B2 JP3018882 B2 JP 3018882B2
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- piezoelectric transformer
- electrodes
- lower surfaces
- piezoelectric
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種の直流電源に用い
られるトランスに関し、特に小型化、軽量化、高信頼性
を要求される小型整流電源に係る圧電トランスに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer for use in various DC power supplies, and more particularly to a piezoelectric transformer for a small rectified power supply which is required to be reduced in size, weight, and high reliability.
【０００２】[0002]
【従来の技術】従来、複写機や液晶バックライトに用い
られる昇圧トランスや電池駆動式機器に商用電源線から
電源を供給するＡＣアダプタ−等の降圧トランスには、
ほとんどの場合電磁式の巻線トランスが用いられてき
た。一方、巻線トランスとは全く動作原理の異なる圧電
トランスが1958年R.ROSENにより提案され(米国特許第2,
830,274号明細書参照)、その後いくらかの提案がなされ
ている。2. Description of the Related Art Conventionally, a step-down transformer such as a step-up transformer used for a copying machine or a liquid crystal backlight or an AC adapter for supplying power from a commercial power line to a battery-driven device has been used.
In most cases, electromagnetic winding transformers have been used. On the other hand, a piezoelectric transformer with a completely different operating principle from a wound transformer was proposed by R. ROSEN in 1958 (U.S. Pat.
830,274), and some suggestions have since been made.
【０００３】図１３は、R.ROSENの提案による圧電トラ
ンスの斜視図であり、この圧電トランスは、その左半分
は入力部であり、圧電体21の上下面に上部電極(入力電
極)22及び下部電極(入力電極)23が設けられており、そ
して、上下面に垂直な方向に分極されている(図１３矢
印参照)。一方、右半分は出力部であり、右端面に出力
電極２４が設けられており、そして、圧電体21の長さ方
向に分極されている(図１３矢印参照)。この圧電トラン
スにおいて、上部電極22と下部電極23の間に交流電圧が
印加されると、圧電効果により縦振動が励振され、出力
部の電極24から高電圧が取り出される。なお、図１３中
の26及び27は引出し線である。FIG. 13 is a perspective view of a piezoelectric transformer proposed by R. ROSEN. The left half of the piezoelectric transformer is an input section, and upper and lower electrodes (input electrodes) 22 and A lower electrode (input electrode) 23 is provided, and is polarized in a direction perpendicular to the upper and lower surfaces (see arrows in FIG. 13). On the other hand, the right half is an output section, on which an output electrode 24 is provided on the right end face, and is polarized in the length direction of the piezoelectric body 21 (see the arrow in FIG. 13). In this piezoelectric transformer, when an AC voltage is applied between the upper electrode 22 and the lower electrode 23, longitudinal vibration is excited by the piezoelectric effect, and a high voltage is extracted from the electrode 24 of the output unit. In addition, 26 and 27 in FIG. 13 are leader lines.
【０００４】図１４は、その後改善された昇圧型圧電ト
ランスの代表例を示す図であって(特公昭63−10593号公
報参照)、これは、積層部42と基体部43とから構成され
ている。積層部42は、圧電体層44と引出し電極(ｅ'n、
ｅ'n-1……ｅ'1)を有する電極層(ｅn、ｅn-1……ｅl)と
を交互に配列し、積層方向に基体部43が設けられてい
る。基体部43の上下面には上部電極22及び下部電極23が
設けられており、左端面には出力電極45が設けられてい
る。FIG. 14 is a diagram showing a typical example of a step-up type piezoelectric transformer which has been improved thereafter (see Japanese Patent Publication No. 63-10593), which comprises a laminated portion 42 and a base portion 43. I have. The laminated portion 42 includes a piezoelectric layer 44 and an extraction electrode (e ′ n ,
e 'n-1 ...... e' 1) arranged electrode layers (e n, e n-1 ...... e l) and alternately with, base portion 43 is provided in the stacking direction. An upper electrode 22 and a lower electrode 23 are provided on the upper and lower surfaces of the base 43, and an output electrode 45 is provided on the left end surface.
【０００５】この構成らなる圧電トランスにおいて、上
部電極22と下部電極23との間に交流電圧が印加される
と、引出し電極(ｅ'n、ｅ'n-1……ｅ'1)と２次電極であ
る出力電極45との間に圧電体層44の数に応じた出力電圧
が発生し、基体部43から遠い位置にある引出し電極ｅ'n
ほど高電圧を取り出すことができる。In the piezoelectric transformer having this configuration, when an AC voltage is applied between the upper electrode 22 and the lower electrode 23, the extraction electrodes (e ′ n , e ′ n−1 ... E ′ 1 ) and 2 An output voltage corresponding to the number of the piezoelectric layers 44 is generated between the output electrode 45 as the next electrode and the extraction electrode e ′ n located far from the base 43.
The higher the voltage can be taken out.
【０００６】図１５は、昇圧型圧電トランスのもう１つ
の従来の代表例を示す図であり(「エレクトロニク・セ
ラミクス」，1971年3月，P65参照)、この圧電トランス
は、左半分は入力部であり、圧電体21の上下面には上部
電極22と下部電極23が設けられており、そして、上下面
に垂直な方向に分極されている(図１５矢印参照)。一
方、右半分は出力部であり、両側面に出力電極24、同25
が設けられており、そして、圧電体21の幅方向に分極さ
れている(図１５矢印参照)。FIG. 15 is a diagram showing another conventional typical example of a step-up type piezoelectric transformer (refer to "Electronic Ceramics", March 1971, p. 65). An upper electrode 22 and a lower electrode 23 are provided on the upper and lower surfaces of the piezoelectric body 21, and are polarized in a direction perpendicular to the upper and lower surfaces (see arrows in FIG. 15). On the other hand, the right half is the output section, and the output electrodes 24 and 25 on both sides.
Are polarized in the width direction of the piezoelectric body 21 (see arrows in FIG. 15).
【０００７】この構成からなる圧電体トランスにおい
て、上部電極22と下部電極23の間に交流電圧が印加され
ると、出力部の電極24と同25の間に圧電体21の幅／厚さ
の比に応じた出力電圧が取り出される。従って、図１５
に示す昇圧型圧電トランスでは、圧電体21の幅が大き
く、厚さが薄いほど高電圧を取り出すことができる。In the piezoelectric transformer having this configuration, when an AC voltage is applied between the upper electrode 22 and the lower electrode 23, the width / thickness of the piezoelectric body 21 is reduced between the electrodes 24 and 25 of the output section. An output voltage corresponding to the ratio is obtained. Therefore, FIG.
In the step-up type piezoelectric transformer shown in (1), a higher voltage can be extracted as the width and the thickness of the piezoelectric body 21 are smaller.
【０００８】[0008]
【発明が解決しようとする課題】ところで、前記圧電ト
ランスは、巻線トランスに較べて小型、軽量、不燃性等
の極めて魅力的な特性を備えている。しかしながら、前
記のような圧電トランスでは、入力部、出力部ともに電
極からの接続については、機械振動の接点にはなく、こ
のため著しく信頼性の低下を招いている欠点を有してい
る。Incidentally, the piezoelectric transformer has extremely attractive characteristics, such as small size, light weight, and nonflammability, as compared with the wound transformer. However, such a piezoelectric transformer has a drawback that the input and output sections are not connected to the mechanical vibration contact point from the electrodes in both the input section and the output section, thereby significantly reducing the reliability.
【０００９】また、変成比の大きい昇圧型に設計されて
いるため、エネルギ−密度を大きくしたり、降圧型等を
含む低変比のトランスとして使用したりするには、圧電
体の寸法比を変えて厚さを極めて厚くしたり、長さを短
くしたりする必要があり、工業的に実用可能な寸法で圧
電トランスを作製することができないという問題点を有
している。Further, since the transformer is designed to have a large transformation ratio, the dimensional ratio of the piezoelectric body must be reduced in order to increase the energy density or to use the transformer as a low transformation ratio including a step-down type. In addition, it is necessary to make the thickness extremely large or shorten the length, and there is a problem that a piezoelectric transformer cannot be manufactured with industrially practicable dimensions.
【００１０】また、図１５に示す昇圧型圧電トランス
は、本発明の圧電トランスに最も近いものであるが、単
に事例として紹介されたものにすぎず、圧電体の寸法
(特に厚さ)や電極への入力端子の接続等についての説明
がなく、実用上構造面に問題がある。この圧電トランス
において、出力圧電として高電圧を取り出そうとする
と、圧電体の幅を大きくするには、圧電体の長さや分極
印加電圧の問題から制限があり、圧電体の幅を薄くする
必要がある。Further, the step-up type piezoelectric transformer shown in FIG. 15 is closest to the piezoelectric transformer of the present invention, but is merely an example, and the dimensions of the piezoelectric body are not limited.
There is no description about (especially the thickness), connection of the input terminal to the electrode, and the like, and there is a problem in practical structure. In this piezoelectric transformer, in order to take out a high voltage as an output piezoelectric, increasing the width of the piezoelectric body is limited due to the length of the piezoelectric body and the voltage applied to the polarization, and it is necessary to reduce the width of the piezoelectric body. .
【００１１】しかしながら、圧電体の厚さが薄いと、両
側面に電極を形成することが困難であるのみならず、両
側面からの引出し線の接続や分極等の処理作業におい
て、圧電体を破損するといった問題点を有している。However, if the thickness of the piezoelectric body is small, not only is it difficult to form electrodes on both sides, but also the piezoelectric body is damaged during processing operations such as connection of lead wires from both sides and polarization. There is a problem that it does.
【００１２】本発明は、上記欠点、問題点を解消する圧
電トランスを提供することを目的とし、詳細には、変成
比の比較的低い領域まで対応できる極めて信頼性の高い
圧電トランスを提供することを目的とする。即ち、従来
の圧電トランスには信頼性、安全性が大きな問題であっ
たが、本発明は、これを振動の接点を通じて電気的接続
を行うことにより改善すると共に、変成比の高い領域か
ら低領域まで設計できる新しい構成の圧電トランスを提
供することを目的とする。An object of the present invention is to provide a piezoelectric transformer which solves the above-mentioned drawbacks and problems. More specifically, it is an object of the present invention to provide an extremely reliable piezoelectric transformer capable of dealing with a region having a relatively low transformation ratio. With the goal. That is, the reliability and safety of the conventional piezoelectric transformer were serious problems. However, the present invention improves the problem by making an electrical connection through a vibration contact, and at the same time, changes the region from a high transformation ratio to a low transformation region. The purpose of the present invention is to provide a piezoelectric transformer having a new configuration that can be designed up to a maximum.
【００１３】[0013]
【課題を解決するための手段】本発明の圧電トランス
は、・長板状の圧電体を長さ方向で２等分し、一方を入力
部、他方を出力部とし、 ・一方の入力部が、圧電体の上下面に設けた電極と、上
下面に垂直な方向に分 極した入力部であり、 ・他方の出力部が、圧電体の両側面の特定部分に設けた
電極（即ち、両側面及 び近傍の上下面にコ字状に設けた
電極、もしくは、両側面近傍の上下面に設 けた電極）
と、側面に垂直な方向に分極した出力部である、あるい
は ・長板状の圧電体を長さ方向で４又は３等分し、 ・両端部を入力部、中央部を出力部の組み合わせ、もし
くは、 ・両端部を出力部、中央部を入力部の組み合わせとし、
該入力部が、圧電体の上下面に設けた電極と、上下面に
垂直な方向に分極した 入力部であり、 該出力部が、圧電
体の両側面に設けた電極と、側面に垂直な方向に分極し
た出 力部である、ことを特徴とし、 これにより前記目的
とする圧電トランスを提供するものである。According to the piezoelectric transformer of the present invention , a long plate-shaped piezoelectric body is bisected in the length direction and one of the two is input.
And the other as an output unit , one of the input units is an electrode provided on the upper and lower surfaces of the piezoelectric body,
An input unit which is divided electrode in a direction perpendicular to the lower surface, - the other output unit, provided to a particular portion of the both side surfaces of the piezoelectric
Electrodes (i.e., provided in a U-shape on the upper and lower surfaces of the both sides及 beauty vicinity
Electrodes, or set only the electrode on the upper and lower surfaces of the both sides near)
And the output polarized in a direction perpendicular to the side, or
And 4 or 3 equally divided in the length direction of the-long plate-like piezoelectric body, an input unit, both end portions, the combination of the output portion a central portion, if
Ku, the output portion, both end portions, and a combination of the input unit a central unit,
The input unit includes electrodes provided on the upper and lower surfaces of the piezoelectric body, and
A vertically polarized input, wherein the output is a piezoelectric
Electrodes on both sides of the body and polarized in a direction perpendicular to the sides
And a output unit, it is characterized, thereby there is provided a piezoelectric transformer according to the purpose.
【００１４】即ち、本発明は、「長板状の圧電体と表面
に形成した電極よりなる圧電トランスにおいて、 (1) 長さ方向の機械共振波長λの振動モ−ドで励振する
構成とし、圧電体を長さ方向で２等分し、一方を入力
部、他方を出力部とし、一方は上下面に電極を設け、上
下面に垂直な方向に分極し、他方は両側面及び近傍の上
下面にコ字状の電極を設け、上下面に平行で側面に垂直
な方向に分極したことを特徴とする圧電トランス（請求
項１）。 (2) 長さ方向の機械共振波長λの振動モ−ドで励振する
構成とし、圧電体を長さ方向で２等分し、一方を入力
部、他方を出力部とし、一方は上下面に電極を設け、上
下面に垂直な方向に分極し、他方は両側面近傍の上下面
に電極を設け、上下面に平行で側面に垂直な方向に分極
したことを特徴とする圧電トランス（請求項２）。 (3) 長さ方向の機械共振波長λの２λの振動モ−ドで励
振する構成とし、圧電体を長さ方向で４等分し、両端部
を入力部、中央部２つを出力部とし、両端部は上下面に
電極を設け、上下面に垂直な方向に分極し、中央部２つ
は両側面に電極を設け、上下面に平行で側面に垂直な方
向に分極したことを特徴とする圧電トランス（請求項
３）。 (4) 長さ方向の機械共振波長λの２λの振動モ−ドで励
振する構成とし、圧電体を長さ方向で４等分し、両端部
を出力部、中央部２つを入力部とし、両端部は両側面に
電極を設け、上下面に平行で側面に垂直な方向に分極
し、中央部２つは上下面に電極を設け、上下面に垂直な
方向に分極したことを特徴とする圧電トランス（請求項
５）。 (5) 長板状の圧電体と表面に形成した電極よりなる圧電
トランスにおいて、該圧電体の長さ方向の機械共振波長
λの１／２λの３倍の３次縦振動モードで励振する構成
とし、該圧電体の長さ方向に３等分の領域を有し、両端
部の２／３領域を入力部、中央部の１／３領域を出力部
とし、両端部は上下面に電極を設け、上下面に垂直な方
向に分極し、中央部は両側面に電極を設け、該両側面に
設けた電極に垂直方向で、上下面に平行な方向に分極し
たことを特徴とする圧電トランス（請求項７）。 (6) 長板状の圧電体と表面に形成した電極よりなる圧電
トランスにおいて、該圧電体の長さ方向の機械共振波長
λの１／２λの３倍の３次縦振動モ−ドで励振する構成
とし、該圧電体の長さ方向に３等分の領域を有し、両端
部の２／３領域を出力部、中央部の１／３領域を入力部
とし、両端部は両側面に電極を設け、該両側面に設けた
電極に垂直方向で、上下面に平行な方向に分極し、中央
部は上下面に電極を設け、上下面に垂直な方向に分極し
たことを特徴とする圧電トランス（請求項８）。」を要
旨とする。That is, according to the present invention, there is provided a piezoelectric transformer comprising a long plate-shaped piezoelectric body and electrodes formed on the surface thereof. (1) The piezoelectric transformer is configured to be excited in a vibration mode having a mechanical resonance wavelength λ in a longitudinal direction, The piezoelectric body is divided into two equal parts in the longitudinal direction, one is an input part, the other is an output part, one is provided with electrodes on the upper and lower surfaces, polarized in the direction perpendicular to the upper and lower surfaces, and the other is on both sides and the vicinity A piezoelectric transformer, wherein a U-shaped electrode is provided on the lower surface and polarized in a direction parallel to the upper and lower surfaces and perpendicular to the side surface (Claim 1). The piezoelectric body is divided into two equal parts in the length direction, one is an input part, the other is an output part, one is provided with electrodes on the upper and lower surfaces, and polarized in a direction perpendicular to the upper and lower surfaces, The other is characterized in that electrodes are provided on the upper and lower surfaces near both side surfaces and polarized in a direction parallel to the upper and lower surfaces and perpendicular to the side surfaces. (3) A configuration in which the piezoelectric body is excited in a vibration mode of 2λ having a mechanical resonance wavelength λ in the longitudinal direction, the piezoelectric body is divided into four equal parts in the longitudinal direction, and both ends are input portions, Two central portions are output portions, and both end portions are provided with electrodes on upper and lower surfaces and polarized in a direction perpendicular to the upper and lower surfaces. Two central portions are provided with electrodes on both side surfaces and are parallel to the upper and lower surfaces and perpendicular to the side surfaces. A piezoelectric transformer characterized in that it is polarized in the longitudinal direction (Claim 3) (4) The piezoelectric transformer is configured to be excited in a vibration mode of 2λ having a mechanical resonance wavelength λ in the longitudinal direction, and the piezoelectric body is divided into four in the longitudinal direction. Separately, both ends are the output part, and the two central parts are the input part. Both ends are provided with electrodes on both sides, polarized in the direction parallel to the upper and lower surfaces and perpendicular to the side surfaces, and the two central parts are the upper and lower surfaces. A piezoelectric transformer having electrodes and polarized in a direction perpendicular to the upper and lower surfaces (Claim 5) (5) A long plate-shaped piezoelectric body and electrodes formed on the surface The piezoelectric transformer is configured to excite in a tertiary longitudinal vibration mode of three times の λ of the mechanical resonance wavelength λ in the length direction of the piezoelectric body, and is divided into three equal parts in the length direction of the piezoelectric body. The two-thirds region at both ends is an input unit, the one-third region at the center is an output unit, electrodes are provided on the upper and lower surfaces, and both ends are polarized in a direction perpendicular to the upper and lower surfaces. Provide electrodes on both sides ,
A piezoelectric transformer polarized in a direction perpendicular to the provided electrodes and in a direction parallel to the upper and lower surfaces . (6) In a piezoelectric transformer composed of a long plate-shaped piezoelectric body and electrodes formed on the surface, the piezoelectric transformer is excited in a tertiary longitudinal vibration mode which is three times the half of the mechanical resonance wavelength λ in the longitudinal direction of the piezoelectric body. The piezoelectric body has three equally divided regions in the longitudinal direction, two-thirds of both ends are used as an output part, a central one-third is used as an input part, and both ends are provided on both sides. Electrodes were provided on both sides
A piezoelectric transformer characterized in that it is polarized in a direction perpendicular to the electrodes and parallel to the upper and lower surfaces, an electrode is provided on the upper and lower surfaces in a central portion, and polarized in a direction perpendicular to the upper and lower surfaces. ”.
【００１５】[0015]
【実施例】以下、本発明の実施例を挙げ、本発明をより
詳細に説明するが、まず、以下の各実施例において共通
の事項をまとめて説明する。 圧電体(圧電トランス用素板) NEPEC 8［商品名、(株)ト−キン製］の焼結体を用い、
所用の寸法形状に切断加工して、長板状の圧電体素板に
した。 電極の形成 銀75％、パラジュ−ム25％の銀-パラジュ−ムペ−スト
を使用し、厚膜スクリ−ン印刷法でパタ−ン形成し、60
0℃で焼付けを行って電極を形成した。 分極処理 150℃の絶縁油中で、厚さ方向は約1.5ＫＶ／ｍｍ、長さ
方向は約1.1ｍｍＶ／ｍの直流電界を印加し、30分間保
持した。 引出し線(入出力リ−ド線)の接続 機械振動の接点に相当する位置で、電極の中央部に0.1
φの銅線を半田付け接続した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to embodiments of the present invention. First, common items in each of the following embodiments will be described together. Using a sintered body of piezoelectric body (base plate for piezoelectric transformer) NEPEC 8 (trade name, manufactured by Tokin Co., Ltd.)
It was cut into the required dimensions and shape to obtain a long plate-shaped piezoelectric element plate. Formation of Electrode A pattern was formed by a thick screen printing method using silver-palladium paste of 75% silver and 25% palladium.
The electrodes were formed by baking at 0 ° C. Polarization treatment In an insulating oil at 150 ° C., a DC electric field of about 1.5 KV / mm in the thickness direction and about 1.1 mmV / m in the length direction was applied and maintained for 30 minutes. Connection of the lead wire (input / output lead wire) At the position corresponding to the mechanical vibration contact, 0.1
φ copper wire was connected by soldering.
【００１６】（実施例１）図１は、本発明の実施例１に
よる圧電トランスの斜視図であり、実施例１では、図１
に示すようなλモ−ドの昇圧型圧電トランス(λ／２の
２倍モ−ドの圧電トランス)を製作した。図１におい
て、１は圧電体素板であり、２及び３は入力電極、４及
び５は出力電極である。図１において示されている矢印
は分極処理による残留分極の向きを模式的に示したもの
である。即ち入力部は上下の入力電極２、３面に垂直な
方向に、出力部は両側面の出力電極４、５に垂直な方向
であることを示す。(Embodiment 1) FIG. 1 is a perspective view of a piezoelectric transformer according to Embodiment 1 of the present invention.
A step-up type piezoelectric transformer of the .lambda. Mode (two times mode of .lambda. / 2) as shown in FIG. In FIG. 1, 1 is a piezoelectric element plate, 2 and 3 are input electrodes, and 4 and 5 are output electrodes. The arrows shown in FIG. 1 schematically show the directions of the remanent polarization due to the polarization processing. That is, the input portion is in a direction perpendicular to the upper and lower input electrodes 2 and 3, and the output portion is in a direction perpendicular to the output electrodes 4 and 5 on both side surfaces.
【００１７】圧電体の寸法は、長さ75.0mm、幅20.0mm、
厚さ1.6mmとした。入出力電極は中央部で間隙を残し、
入力部は上下面の半分に入力電極２、３を形成し、出力
部は、両側面で出力電極４、５を形成した。その後、入
出力電極のそれぞれ中央部に引出し線６、７を接続し、
分極処理を行った。圧電トランスの入力部に24Ｖの定電
圧正弦波を加え出力を求めた。この結果、共振周波数32
ＫＨｚで、出力インピ−ダンス676ＫΩの時、出力1050
Ｖで2.5Ｗの出力を得た。The dimensions of the piezoelectric body are 75.0 mm in length, 20.0 mm in width,
The thickness was 1.6 mm. The input and output electrodes leave a gap at the center,
The input portion has input electrodes 2 and 3 formed on half of the upper and lower surfaces, and the output portion has output electrodes 4 and 5 formed on both side surfaces. After that, lead wires 6 and 7 are connected to the central portions of the input and output electrodes, respectively.
Polarization treatment was performed. A constant voltage sine wave of 24 V was applied to the input portion of the piezoelectric transformer to determine the output. As a result, the resonance frequency 32
At KHz, when the output impedance is 676KΩ, the output is 1050
An output of 2.5 W was obtained at V.
【００１８】本構成からなる実施例１の圧電トランス
は、圧電体の幅を狭くしても機械振動によるスプリアス
の影響がほとんどない変成比の小さい圧電トランスとし
ても使用できると共に、入出力を逆にすることにより降
圧型の圧電トランスを実現することができる。The piezoelectric transformer according to the first embodiment of the present invention can be used as a piezoelectric transformer having a small transformation ratio which is hardly affected by spurious vibration due to mechanical vibration even if the width of the piezoelectric body is reduced, and the input / output is reversed. By doing so, a step-down piezoelectric transformer can be realized.
【００１９】図２は、本発明の実施例１の圧電トランス
における出力部の１例を示す縦断面図であり、図３は、
同じく実施例１の圧電トランスにおける出力部の他の例
を示す縦断面図である。図２及び図３中、１は圧電体素
板、４、５は出力電極(側面電極)であり、本実施例１の
圧電トランスでは、その出力部の電極４、同５を図２に
示すように両側面及び近傍の上下面にコ字状に設ける
か、または図３に示すように両側面近傍の上下面に設け
る。 FIG. 2 is a longitudinal sectional view showing an example of an output section in the piezoelectric transformer according to the first embodiment of the present invention, and FIG.
FIG. 5 is a vertical sectional view illustrating another example of the output unit in the piezoelectric transformer according to the first embodiment. 2 and 3, reference numeral 1 denotes a piezoelectric body plate, and reference numerals 4 and 5 denote output electrodes (side electrodes). In the piezoelectric transformer of the first embodiment, the electrodes 4 and 5 of the output portion are shown in FIG. So that it is U-shaped on both sides and the upper and lower surfaces
Or provided on the upper and lower surfaces near both sides as shown in FIG.
You.
【００２０】本実施例１では、圧電体の厚さが薄い(特
に１ｍｍ以下のもの)圧電トランスの出力部の分極処理
の際に、側面近傍の上下面電極部に分極端子を接続する
ことによる、また、長さ方向の機械振動の節点で側面近
傍の上下面電極部から引出し線を取り出すことによる圧
電体のクラックや破損を防止することができる利点を有
する。In the first embodiment, the polarization terminal is connected to the upper and lower electrodes near the side surface during the polarization processing of the output portion of the piezoelectric transformer in which the thickness of the piezoelectric body is small (especially 1 mm or less). In addition, there is an advantage that cracks and breakage of the piezoelectric body due to drawing out the lead lines from the upper and lower electrode portions near the side surface at the node of the mechanical vibration in the length direction can be prevented.
【００２１】（実施例２）図４は、本発明の実施例２に
よる圧電トランスの斜視図であり、本実施例２では、図
４に示すような２λモ−ドの昇圧型圧電トランス(λ／
２の４倍モ−ドの圧電トランスであり、図１の圧電トラ
ンスを２個接続した構成からなるもの)を製作した。(Embodiment 2) FIG. 4 is a perspective view of a piezoelectric transformer according to Embodiment 2 of the present invention. In Embodiment 2, as shown in FIG. /
2, a piezoelectric transformer of a four-times mode, having a configuration in which two piezoelectric transformers of FIG. 1 are connected.
【００２２】図４において、１は圧電体素板、２、３は
入力電極、４、５及び８、９は出力電極である。この図
４において示されている矢印は分極処理による残留分極
の向きを模式的に示したものである。即ち、入力部は上
下の入力電極２、３面に垂直な方向に、また、出力部は
両側面の出力電極４、５及び８、９に垂直な方向である
ことを示す。In FIG. 4, reference numeral 1 denotes a piezoelectric element plate, reference numerals 2, 3 denote input electrodes, and reference numerals 4, 5, 8, and 9 denote output electrodes. The arrows shown in FIG. 4 schematically show the directions of the remanent polarization due to the polarization processing. That is, the input portion is in a direction perpendicular to the upper and lower input electrodes 2 and 3, and the output portion is in a direction perpendicular to the output electrodes 4, 5, 8 and 9 on both side surfaces.
【００２３】圧電体の寸法は、長さ150.0mm、幅20.0m
m、厚さ1.6mmとした。圧電体素板１を長さ方向で４等分
し、入力部は両端部の上下面に入力電極２、３を形成
し、出力部は中央部２つの領域の両側面部に出力電極
４、５及び８、９を形成した。(但し、両端部の入力電
極２、３と中央部の出力電極４、５又は８、９との間に
間隙を持たせ、中央部の出力電極４、５と８、９ との
間も間隙を持たせた。)その後、入出力電極のそれぞれ
中央部に引出し線６、７、10を接続し、分極処理を行っ
た。The dimensions of the piezoelectric body are 150.0 mm in length and 20.0 m in width.
m and thickness 1.6 mm. The piezoelectric element plate 1 is divided into four equal parts in the length direction, the input part is formed with input electrodes 2 and 3 on the upper and lower surfaces of both ends, and the output part is formed with the output electrodes 4 and 5 on both side parts of two central regions. And 8, 9 were formed. (However, a gap is provided between the input electrodes 2 and 3 at both ends and the output electrodes 4, 5 or 8 and 9 at the center, and a gap is also provided between the output electrodes 4, 5 and 8 and 9 at the center. After that, the lead wires 6, 7, and 10 were connected to the central portions of the input and output electrodes, respectively, and polarization was performed.
【００２４】圧電トランスの入力部の引出し線６に24Ｖ
の定電圧正弦波を加え、引出し線７と10との間の出力を
求めた。この結果、共振周波数32ＫＨｚで、出力インピ
−ダンス338ＫΩの時、出力電圧1250Ｖを得た。(昇圧
比：52.0、出力：4.6Ｗ)次に、一方の出力電極４と８の
間を引出し線７で接続し、もう一方の出力電極５と９間
の出力を求めた。初期試験として、圧電トランスの入力
部に１Ｖの定電圧正弦波を加え、出力電圧を測定した結
果、共振周波数32ＫＨｚで昇圧比104.0を得た。本実施
例２では、昇圧型のトランスとして使用したが、入力部
と出力部を入れ替えて外部端子との接続をすれば降圧型
のトランスとして使用することもでき、これも本発明に
包含するものである。 24V is applied to the lead 6 of the input section of the piezoelectric transformer.
, And the output between the lead wires 7 and 10 was obtained. As a result, when the resonance frequency was 32 KHz and the output impedance was 338 KΩ, an output voltage of 1250 V was obtained. (Step-up ratio: 52.0, output: 4.6 W) Next, one of the output electrodes 4 and 8 was connected by a lead wire 7, and the output between the other output electrodes 5 and 9 was obtained. As an initial test, a constant voltage sine wave of 1 V was applied to the input portion of the piezoelectric transformer, and the output voltage was measured. As a result, a boosting ratio of 104.0 was obtained at a resonance frequency of 32 KHz. This implementation
In Example 2, although it was used as a step-up type transformer,
If you replace the output section and connect to the external terminal, step-down type
Can also be used as a transformer, which is also
Includes
【００２５】（実施例３）図５は、本発明の実施例３に
よる圧電トランスの斜視図であり、実施例３では、図５
に示すような２λモ−ドの昇圧型圧電トランス(λ／２
の４倍モ−ドの圧電トランスであり、前記図４の圧電ト
ランスの中央部での分極方向が同一方向のもの)を製作
した。(Embodiment 3) FIG. 5 is a perspective view of a piezoelectric transformer according to Embodiment 3 of the present invention.
The step-up type piezoelectric transformer (λ / 2
A piezoelectric transformer having the same polarization direction at the center of the piezoelectric transformer shown in FIG. 4) was manufactured.
【００２６】この図５に示す番号及び処理は、分極処理
を除き実施例２と同様である。即ち、中央部の電極間距
離を2mmとして電極を形成した後、中央部２つの領域の
分極方向を側面に垂直で同一な方向に電界を印加し、分
極処理を行った。圧電トランスの入力部の引出し線６に
24Ｖの定電圧正弦波を加え、出力部の電極４と８及び電
極５と９をそれぞれ引出し線で接続し、出力を求めた。
この結果、共振周波数32ＫＨｚで出力インビ−ダンス33
8ＫΩの時、出力1300Ｖを得た。(昇圧比：54、出力：5.
0Ｗ)The numbers and processes shown in FIG. 5 are the same as those of the second embodiment except for the polarization process. That is, after the electrodes were formed with the distance between the electrodes at the central portion being 2 mm, the polarization was applied by applying an electric field in the same direction perpendicular to the side surfaces of the two central regions. To the lead wire 6 of the input part of the piezoelectric transformer
A constant voltage sine wave of 24 V was applied, and the electrodes 4 and 8 and the electrodes 5 and 9 of the output section were connected with lead wires, respectively, and the output was obtained.
As a result, at a resonance frequency of 32 KHz, output impedance 33
At 8 KΩ, an output of 1300 V was obtained. (Boost ratio: 54, output: 5.
0W)
【００２７】（実施例４）図６は、本発明の実施例４に
よる圧電トランスの斜視図であり、実施例４では、図６
に示すような２λモ−ドの昇圧型圧電トランス(λ／２
の４倍モ−ドの圧電トランスであり、前記図４の圧電ト
ランスの入出力部を入れ替えた構成よりなるもの)を製
作した。この図に示す番号は実施例２と同様である。(Embodiment 4) FIG. 6 is a perspective view of a piezoelectric transformer according to Embodiment 4 of the present invention.
The step-up type piezoelectric transformer (λ / 2
4 times mode piezoelectric transformer having a configuration in which the input / output section of the piezoelectric transformer shown in FIG. 4 is replaced). The numbers shown in this figure are the same as in the second embodiment.
【００２８】圧電体の寸法は、長さ150,0mm、幅20.0m
m、厚さ1.6mmとした。圧電体素板１を長さ方向で４等分
し、入力部は中央部２つの領域の上下面に、出力部は両
端部の両側面部にそれぞれ電極を形成した。その後、入
出力電極のそれぞれ中央部に引出し線６、７、10を接続
し、分極処理を行った。圧電トランスの入力部の引出し
線６に24Ｖの定電圧正弦波を加え、出力部の電極４と５
及び電極８と９のそれぞれ間の出力を求めた。この結
果、共振周波数32ＫＨｚで出力インビ−ダンス676ＫΩ
の時、それぞれ出力1300Ｖを得た。The dimensions of the piezoelectric body are 150,0 mm in length and 20.0 m in width.
m and thickness 1.6 mm. The piezoelectric element plate 1 was divided into four equal parts in the length direction, and the input portion was formed with electrodes on the upper and lower surfaces of the two central portions, and the output portion was formed with electrodes on both side portions at both ends. Thereafter, the lead wires 6, 7, and 10 were connected to the central portions of the input and output electrodes, respectively, and polarization was performed. A constant voltage sine wave of 24 V is applied to the lead wire 6 of the input section of the piezoelectric transformer, and the electrodes 4 and 5 of the output section are applied.
And the output between each of the electrodes 8 and 9 was determined. As a result, at a resonance frequency of 32 KHz, the output impedance is 676 KΩ.
At this time, an output of 1300 V was obtained.
【００２９】（実施例５） 図７は、本発明の実施例５による圧電トランスの斜視図
であり、実施例５では、図７に示すような３λ／２モ−
ドの昇圧型圧電トランス（λ／２の３倍の３次縦振動モ
−ドの圧電トランス）を製作した。この図に示す番号は
実施例２と同様である。(Embodiment 5) FIG. 7 is a perspective view of a piezoelectric transformer according to Embodiment 5 of the present invention. In Embodiment 5, a 3λ / 2 mode as shown in FIG.
A step-up type piezoelectric transformer (piezoelectric transformer in a tertiary longitudinal vibration mode three times λ / 2) was manufactured. The numbers shown in this figure are the same as in the second embodiment.
【００３０】圧電体の寸法は、長さ112.5mm、幅20.0m
m、厚さ1.6mmとした。圧電体素板１を長さ方向で３等分
し、入力部は両端部の上下面に、出力部は中央部の両側
面部にそれぞれ電極を形成した。その後、入出力電極の
それぞれ中央部に引出し線６、７を接続し、分極処理を
行った。圧電トランスの入力部の引出し線６に24Vの定
電圧正弦波を加え、引出し線７により出力を求めた。こ
の結果、共振周波数32ＫＨｚで出力インビ−ダンス338
ＫΩの時、出力1300Ｖを得た。本実施例５では、昇圧型
のトランスとして使用したが、入力部と出力部を入れ替
えて外部端子との接続をすれば降圧型のトランスとして
使用することもでき、これも本発明に包含するものであ
る。 The dimensions of the piezoelectric body are 112.5 mm in length and 20.0 m in width.
m and thickness 1.6 mm. The piezoelectric element plate 1 is divided into three equal parts in the length direction, the input part is on the upper and lower surfaces of both ends, and the output part is on both sides of the central part.
An electrode was formed on each surface . Thereafter, the lead wires 6 and 7 were connected to the central portions of the input and output electrodes, respectively, and polarization processing was performed. A constant voltage sine wave of 24 V was applied to the lead wire 6 at the input part of the piezoelectric transformer, and the output was obtained by the lead wire 7. As a result, at the resonance frequency of 32 KHz, the output impedance is 338.
At the time of KΩ, an output of 1300 V was obtained. In the fifth embodiment, a boost type
Used as a transformer, but the input and output sections were swapped
If you connect it to external terminals, you can use it as a step-down transformer
Can also be used, which is also included in the present invention.
You.
【００３１】（実施例６） 図８は、本発明の実施例６による圧電トランスの斜視図
であり、実施例６では、図８に示すような３λ／２モ−
ドの昇圧型圧電トランス（λ／２の３倍モ−ドの圧電ト
ランス）を製作した。この図に示す番号は実施例２と同
様である。(Embodiment 6) FIG. 8 is a perspective view of a piezoelectric transformer according to Embodiment 6 of the present invention. In Embodiment 6, a 3λ / 2 mode as shown in FIG.
De boost piezoelectric transformer (3 lambda / 2-fold molar - piezoelectric DOO <br/> run scan de) was manufactured. The numbers shown in this figure are the same as in the second embodiment.
【００３２】圧電体の寸法は、長さ112.5mm、幅20.0m
m、厚さ1.6mmとした。圧電体素板１を長さ方向で３等分
し、入力部は中央部の上下面に、出力部は両端部の両側
面部にそれぞれ電極を形成した。その後、入出力電極の
それぞれ中央部に引出し線６、７、10を接続し、分極処
理を行った。圧電トランスの入力部の引出し線６に24Ｖ
の定電圧正弦波を加え、出力部の引出し線７及び10のそ
れぞれの出力を求めた。この結果、共振周波数32ＫＨｚ
で出力インビ−ダンス676ＫΩの時、それぞれ出力1300
Ｖを得た。The dimensions of the piezoelectric body are 112.5 mm in length and 20.0 m in width.
m and thickness 1.6 mm. The piezoelectric element plate 1 was divided into three equal parts in the length direction, and the input portion was formed with electrodes on the upper and lower surfaces of the central portion, and the output portion was formed with electrodes on both side portions of both ends. Thereafter, the lead wires 6, 7, and 10 were connected to the central portions of the input and output electrodes, respectively, and polarization was performed. 24V to the lead wire 6 of the input part of the piezoelectric transformer
And the output of each of the lead wires 7 and 10 of the output section was obtained. As a result, the resonance frequency of 32 KHz
When the output impedance is 676KΩ, the output is 1300
V was obtained.
【００３３】（実施例７）図９は、本発明の実施例７に
よる圧電トランスの斜視図であり、実施例７では、図９
に示すように図１に示す実施例１の圧電トランスを多数
個(本実施例７では５個)厚さ方向に積み重ねた圧電トラ
ンスを示す。この図に示す番号は実施例１と同様であ
る。(Embodiment 7) FIG. 9 is a perspective view of a piezoelectric transformer according to Embodiment 7 of the present invention.
1 shows a piezoelectric transformer in which a number of piezoelectric transformers of the first embodiment shown in FIG. 1 (five in the seventh embodiment) are stacked in the thickness direction. The numbers shown in this figure are the same as in the first embodiment.
【００３４】図１０は、本発明の実施例７による積層型
圧電トランスの入力部を示す縦断面図である。また、図
１１は、実施例７による積層型圧電トランスの出力部の
構造の１例を示す縦断面図であり、図１２は、実施例７
の出力部の構造の他の例を示す縦断面図である。FIG. 10 is a longitudinal sectional view showing an input section of a multilayer piezoelectric transformer according to Embodiment 7 of the present invention. FIG. 11 is a longitudinal sectional view showing an example of the structure of the output section of the multilayer piezoelectric transformer according to the seventh embodiment, and FIG.
FIG. 7 is a longitudinal sectional view showing another example of the structure of the output unit.
【００３５】前記した実施例１〜６では、単板トランス
での事例について述べてきたが、複数枚の長板状の圧電
体と表面に形成した電極よりなる圧電トランスを積層し
たものにおいても、何ら支障はなく前記実施例１〜６と
同様の昇圧(降圧)効果を発揮することができる。In the first to sixth embodiments, the case of a single-plate transformer has been described. However, even in the case where a plurality of long-plate-shaped piezoelectric bodies and a piezoelectric transformer composed of electrodes formed on the surface are laminated, There is no hindrance, and the same boosting (lowering) effect as in the first to sixth embodiments can be exhibited.
【００３６】[0036]
【発明の効果】本発明は、以上詳記したとおり、入力部
における電極を長板状圧電体の上下部に設け、上下面に
垂直な方向に分極し、出力部における電極を長板状圧電
体の特定の“位置または構造”とし、側面に垂直な方向
に分極したことを特徴とし、圧電体の横効果縦振動によ
る駆動、発電を利用できる構成としたことにより、変成
比(昇圧比、降圧比)を主として圧電体の幅及び厚さを変
えることによる対応可能となる効果を生じる。According to the present invention, as described in detail above, the input unit
Electrodes at the top and bottom of the long plate-shaped piezoelectric body
Polarized in the vertical direction, and the electrodes at the output section
Specific "position or structure" of the body, perpendicular to the sides
It is characterized by being polarized to the structure, and by using the driving and power generation by the transverse effect longitudinal vibration of the piezoelectric body, the transformation ratio (boost ratio, step-down ratio) is mainly changed by changing the width and thickness of the piezoelectric body This produces an effect that can be handled.
【００３７】そして、本発明によれば、上記したとお
り、変成比を主として圧電体の幅(及び厚さ)を変えるこ
とにより実現できる構成としたため、変成比が低い降圧
型等の圧電トランスをも提供することができる。また、
本発明は、縦振動の節点に入力部電極から引出し線を設
けることを特徴とし、これにより圧電体の振動による電
気的接続の不安定さが解消でき、極めて信頼性の高い圧
電トランスを提供することができ、信頼性向上の効果が
生じる。Further, according to the present invention, as described above, since the transformation ratio can be realized mainly by changing the width (and thickness) of the piezoelectric body, a step-down type piezoelectric transformer having a low transformation ratio can be used. Can be provided. Also,
The present invention is characterized in that a lead line is provided from an input electrode at a node of longitudinal vibration, thereby making it possible to eliminate instability of electrical connection due to vibration of a piezoelectric body and provide an extremely reliable piezoelectric transformer. And the effect of improving reliability is produced.
【００３８】従来から各種構造の圧電トランスが提案さ
れているが、工業的に広く使用されていないのは電気的
接続が機械振動の節点で使用されていないことによるも
のである。Conventionally, piezoelectric transformers of various structures have been proposed, but are not widely used industrially because electrical connections are not used at nodes of mechanical vibration.
【図１】本発明の実施例１による圧電トランスの斜視
図。FIG. 1 is a perspective view of a piezoelectric transformer according to a first embodiment of the present invention.
【図２】本発明の実施例１の圧電トランスにおける出力
部の１例を示す縦断面図。FIG. 2 is a longitudinal sectional view showing an example of an output unit in the piezoelectric transformer according to the first embodiment of the present invention.
【図３】本発明の実施例１の圧電トランスにおける出力
部の他の例を示す縦断面図。FIG. 3 is a longitudinal sectional view showing another example of the output unit in the piezoelectric transformer according to the first embodiment of the present invention.
【図４】本発明の実施例２による圧電トランスの斜視
図。FIG. 4 is a perspective view of a piezoelectric transformer according to a second embodiment of the present invention.
【図５】本発明の実施例３による圧電トランスの斜視
図。FIG. 5 is a perspective view of a piezoelectric transformer according to a third embodiment of the present invention.
【図６】本発明の実施例４による圧電トランスの斜視
図。FIG. 6 is a perspective view of a piezoelectric transformer according to a fourth embodiment of the present invention.
【図７】本発明の実施例５による圧電トランスの斜視
図。FIG. 7 is a perspective view of a piezoelectric transformer according to a fifth embodiment of the present invention.
【図８】本発明の実施例６による圧電トランスの斜視
図。FIG. 8 is a perspective view of a piezoelectric transformer according to a sixth embodiment of the present invention.
【図９】本発明の実施例７による積層型圧電トランスの
斜視図。FIG. 9 is a perspective view of a multilayer piezoelectric transformer according to a seventh embodiment of the present invention.
【図１０】本発明の実施例７による積層型圧電トランス
の入力部を示す縦断面図。FIG. 10 is a longitudinal sectional view showing an input section of a multilayer piezoelectric transformer according to a seventh embodiment of the present invention.
【図１１】本発明の実施例７による積層型圧電トランス
の出力部の構造の１例を示す縦断面図。FIG. 11 is a longitudinal sectional view showing an example of the structure of an output section of a multilayer piezoelectric transformer according to Embodiment 7 of the present invention.
【図１２】本発明の実施例７による積層型圧電トランス
の出力部の構造の他の例を示す縦断面図。FIG. 12 is a longitudinal sectional view showing another example of the structure of the output section of the multilayer piezoelectric transformer according to Embodiment 7 of the present invention.
【図１３】従来の圧電トランスの１例を示す斜視図。FIG. 13 is a perspective view showing an example of a conventional piezoelectric transformer.
【図１４】従来の圧電トランスの他の例を示す斜視図。FIG. 14 is a perspective view showing another example of a conventional piezoelectric transformer.
【図１５】従来の圧電トランスのその他の例を示す斜視
図。FIG. 15 is a perspective view showing another example of a conventional piezoelectric transformer.
１ 圧電体素板 ２、３ 入力電極 ４、５ 出力電極（側面電極） ６、７ 引出し線 ８、９ 出力電極（側面電極） １０ 引出し線 ２１ 圧電体 ２２ 上部電極（入力電極） ２３ 下部電極（入力電極） ２４、２５ 出力電極 ２６、２７ 引出し線 ４２ 積層部 ４３ 基体部 ４４ 圧電体層 ４５ 出力電極 ｅ1、ｅ2……ｅn-1、ｅn 電極層 ｅ'1、ｅ'2……ｅ'n-1、ｅ'n 引出し電極DESCRIPTION OF SYMBOLS 1 Piezoelectric element plate 2, 3 Input electrode 4, 5 Output electrode (side electrode) 6, 7 Leader 8, 9 Output electrode (side electrode) 10 Leader 21 Piezoelectric body 22 Upper electrode (input electrode) 23 Lower electrode ( input electrode) 24 and 25 output electrodes 26 and 27 lead wire 42 laminated portion 43 base portion 44 piezoelectric layers 45 output electrode e 1, e 2 ...... e n -1, e n electrode layer e '1, e' 2 ... ... e ' n-1 and e' n extraction electrodes
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実公 昭46−27899（ＪＰ，Ｙ１) 実公 昭46−27900（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) H01L 41/107 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Jikken 46-27899 (JP, Y1) Jikken 46-27900 (JP, Y1) (58) Fields investigated (Int. Cl. 7 , DB name) H01L 41/107
Claims (8)
りなる圧電トランスにおいて、長さ方向の機械共振波長
λの振動モ−ドで励振する構成とし、圧電体を長さ方向
で２等分し、一方を入力部、他方を出力部とし、一方は
上下面に電極を設け、上下面に垂直な方向に分極し、他
方は両側面及び近傍の上下面にコ字状の電極を設け、上
下面に平行で側面に垂直な方向に分極したことを特徴と
する圧電トランス。1. A piezoelectric transformer comprising a long plate-shaped piezoelectric body and electrodes formed on the surface thereof, is configured to be excited in a vibration mode having a mechanical resonance wavelength λ in the longitudinal direction, and the piezoelectric body is driven in the longitudinal direction by two times. Equally divided, one is an input unit, the other is an output unit, one is provided with electrodes on the upper and lower surfaces, polarized in a direction perpendicular to the upper and lower surfaces, and the other is a U-shaped electrode on both sides and near upper and lower surfaces A piezoelectric transformer, wherein the piezoelectric transformer is polarized in a direction parallel to the upper and lower surfaces and perpendicular to the side surfaces.
りなる圧電トランスにおいて、長さ方向の機械共振波長
λの振動モ−ドで励振する構成とし、圧電体を長さ方向
で２等分し、一方を入力部、他方を出力部とし、一方は
上下面に電極を設け、上下面に垂直な方向に分極し、他
方は両側面近傍の上下面に電極を設け、上下面に平行で
側面に垂直な方向に分極したことを特徴とする圧電トラ
ンス。2. A piezoelectric transformer comprising a long plate-shaped piezoelectric body and electrodes formed on the surface thereof, wherein the piezoelectric transformer is configured to be excited in a vibration mode having a mechanical resonance wavelength λ in the longitudinal direction. Equally divided, one is an input unit, the other is an output unit, one is provided with electrodes on the upper and lower surfaces, polarized in a direction perpendicular to the upper and lower surfaces, the other is provided with electrodes on the upper and lower surfaces near both sides, and the upper and lower surfaces A piezoelectric transformer characterized by being polarized in a direction parallel to and perpendicular to the side surface.
りなる圧電トランスにおいて、長さ方向の機械共振波長
λの２λの振動モ−ドで励振する構成とし、圧電体を長
さ方向で４等分し、両端部を入力部、中央部２つを出力
部とし、両端部は上下面に電極を設け、上下面に垂直な
方向に分極し、中央部２つは両側面に電極を設け、上下
面に平行で側面に垂直な方向に分極したことを特徴とす
る圧電トランス。3. A piezoelectric transformer comprising a long plate-shaped piezoelectric body and electrodes formed on the surface thereof, is configured to be excited in a vibration mode of 2λ having a mechanical resonance wavelength λ in a longitudinal direction, and the piezoelectric body is arranged in a longitudinal direction. , The two ends are the input part, the two central parts are the output part, the both ends are provided with electrodes on the upper and lower surfaces, polarized in the direction perpendicular to the upper and lower surfaces, and the two central parts are the electrodes on both sides. Wherein the piezoelectric transformer is polarized in a direction parallel to the upper and lower surfaces and perpendicular to the side surfaces.
力部のそれぞれの領域の分極の向きを、互いに平行な異
なる向きとしたことを特徴とする請求項３記載の圧電ト
ランス。4. The piezoelectric transformer according to claim 3, wherein, in the piezoelectric transformer, the directions of polarization of the respective regions of the input unit and the output unit are different from each other and parallel to each other.
りなる圧電トランスにおいて、長さ方向の機械共振波長
λの２λの振動モ−ドで励振する構成とし、圧電体を長
さ方向で４等分し、両端部を出力部、中央部２つを入力
部とし、両端部は両側面に電極を設け、上下面に平行で
側面に垂直な方向に分極し、中央部２つは上下面に電極
を設け、上下面に垂直な方向に分極したことを特徴とす
る圧電トランス。5. A piezoelectric transformer comprising a long plate-shaped piezoelectric body and electrodes formed on the surface thereof, wherein the piezoelectric transformer is configured to be excited in a vibration mode of 2λ having a mechanical resonance wavelength λ in a longitudinal direction, and the piezoelectric body is arranged in a longitudinal direction. , The two ends are the output part, the two central parts are the input parts, the both ends are provided with electrodes on both side surfaces, polarized in the direction parallel to the upper and lower surfaces and perpendicular to the side surfaces, and the two central parts are A piezoelectric transformer having electrodes on upper and lower surfaces and polarized in a direction perpendicular to upper and lower surfaces.
力部のそれぞれの領域の分極の向きを、互いに平行な異
なる向きとしたことを特徴とする請求項５記載の圧電ト
ランス。6. The piezoelectric transformer according to claim 5, wherein the directions of polarization of the respective regions of the input section and the output section in the piezoelectric transformer are different from each other in a direction parallel to each other.
りなる圧電トランスにおいて、該圧電体の長さ方向の機
械共振波長λの１／２λの３倍の３次縦振動モードで励
振する構成とし、該圧電体の長さ方向に３等分の領域を
有し、両端部の２／３領域を入力部、中央部の１／３領
域を出力部とし、両端部は上下面に電極を設け、上下面
に垂直な方向に分極し、中央部は両側面に電極を設け、
該両側面に設けた電極に垂直方向で、上下面に平行な方
向に分極したことを特徴とする圧電トランス。7. A piezoelectric transformer comprising a long plate-shaped piezoelectric body and electrodes formed on the surface thereof, which is excited in a tertiary longitudinal vibration mode of three times 1 / 2λ of the mechanical resonance wavelength λ in the longitudinal direction of the piezoelectric body. In this configuration, the piezoelectric body has three equally divided regions in the longitudinal direction, two-thirds regions at both ends as an input portion, a central one-third region as an output portion, and both ends at upper and lower surfaces. Provide electrodes, polarize in the direction perpendicular to the upper and lower surfaces, provide electrodes on both sides in the center,
One perpendicular to the electrodes provided on both sides and parallel to the upper and lower surfaces
A piezoelectric transformer characterized in that it is polarized in two directions .
りなる圧電トランスにおいて、該圧電体の長さ方向の機
械共振波長λの１／２λの３倍の３次縦振動モ−ドで励
振する構成とし、該圧電体の長さ方向に３等分の領域を
有し、両端部の２／３領域を出力部、中央部の１／３領
域を入力部とし、両端部は両側面に電極を設け、該両側
面に設けた電極に垂直方向で、上下面に平行な方向に分
極し、中央部は上下面に電極を設け、上下面に垂直な方
向に分極したことを特徴とする圧電トランス。8. In a piezoelectric transformer comprising a long plate-shaped piezoelectric body and electrodes formed on the surface thereof, a third-order longitudinal vibration mode in which the mechanical resonance wavelength λ in the longitudinal direction of the piezoelectric body is three times as long as 1 / 2λ. The piezoelectric body has a region divided into three equal parts in the longitudinal direction of the piezoelectric body, two-thirds regions at both ends as an output portion, a central one-third region as an input portion, and both end portions at both sides. Provide electrodes on the surface,
The vertical direction of the electrode provided on the surface and the direction parallel to the upper and lower surfaces
Electrode, and the central portion of the electrode provided on the upper and lower surfaces, the piezoelectric transformer being characterized in that polarized in a direction perpendicular to the upper and lower surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5349560A JP3018882B2 (en) | 1992-12-31 | 1993-12-29 | Piezoelectric transformer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36017492 | 1992-12-31 | ||
| JP4-360174 | 1992-12-31 | ||
| JP5349560A JP3018882B2 (en) | 1992-12-31 | 1993-12-29 | Piezoelectric transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06252466A JPH06252466A (en) | 1994-09-09 |
| JP3018882B2 true JP3018882B2 (en) | 2000-03-13 |
Family
ID=26578979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5349560A Expired - Lifetime JP3018882B2 (en) | 1992-12-31 | 1993-12-29 | Piezoelectric transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3018882B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5929554A (en) * | 1994-12-30 | 1999-07-27 | Mitsui Chemicals, Inc. | Piezoelectric transformer |
| US5701049A (en) * | 1994-12-30 | 1997-12-23 | Mitsui Petrochemical Industries, Ltd. | Piezoelectric transformer |
| JP2962231B2 (en) * | 1996-06-18 | 1999-10-12 | 日本電気株式会社 | Piezoelectric transformer |
| JP2002076465A (en) * | 2000-08-30 | 2002-03-15 | Kyocera Corp | Piezoelectric transformer and a-d converter |
-
1993
- 1993-12-29 JP JP5349560A patent/JP3018882B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06252466A (en) | 1994-09-09 |
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