KR820001824Y1 - Driving circuit of piezo-electric device - Google Patents

Driving circuit of piezo-electric device Download PDF

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Publication number
KR820001824Y1
KR820001824Y1 KR2019820004823U KR820004823U KR820001824Y1 KR 820001824 Y1 KR820001824 Y1 KR 820001824Y1 KR 2019820004823 U KR2019820004823 U KR 2019820004823U KR 820004823 U KR820004823 U KR 820004823U KR 820001824 Y1 KR820001824 Y1 KR 820001824Y1
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KR
South Korea
Prior art keywords
driving circuit
piezoelectric element
coil
transistor
piezo
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Application number
KR2019820004823U
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Korean (ko)
Inventor
미쯔히르 하마다니
Original Assignee
가부시기 가이샤 세이코오샤
모가미 쯔도무
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Priority to KR2019820004823U priority Critical patent/KR820001824Y1/en
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Publication of KR820001824Y1 publication Critical patent/KR820001824Y1/en

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/802—Drive or control circuitry or methods for piezoelectric or electrostrictive devices not otherwise provided for

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  • Electromechanical Clocks (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

내용 없음.No content.

Description

압전소자의 구동회로Piezoelectric element drive circuit

제1도는 본 고안의 1실시예를 보인 압전소자의 구동회로.1 is a driving circuit of a piezoelectric element showing an embodiment of the present invention.

제2도는 제1도의 회로 요부의 파형을 보인 타임챠트.FIG. 2 is a time chart showing the waveform of the circuit main part of FIG.

제3도는 금속 진동판에 안전 세라믹을 부착시킨 평면도.3 is a plan view in which a safety ceramic is attached to a metal diaphragm.

제4도는 음압과 주파수의 관계를 보인 실험 곡선도.4 is an experimental curve showing the relationship between sound pressure and frequency.

제5도는 종래의 압전소의 구동회로.5 is a driving circuit of a conventional piezoelectric element.

제6도는 제5도 회로 요부의 파형을 보인 타임챠아트.6 is a time chart showing the waveform of the main circuit of FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

P2: 압전소자 m : 압전 세라믹P 2 : piezoelectric element m: piezoelectric ceramic

n : 금속 진동판n: metal diaphragm

본 고안은 압전소자를 구동하는 구동회로에 관한 것이다.The present invention relates to a driving circuit for driving a piezoelectric element.

압전소자의 구동회로의 1예로서, 종래에는 제5도에 도시된 바와 같은 트랜지스터 회로가 있었다. 이것은 트랜지스터(Tr1)에 공급되는 제6도 a의 펄스신호의 수직하강시, 즉 트랜지스터(Tr1)의 컷오프시(cut-off)에 코일(L1)에 생기는 역유기 전압에 의해서 압전소자(P1)를 구동하는 것이었다. 이 파형의 1예를 나타낸 것이 제6도 b이다.As an example of the driving circuit of the piezoelectric element, there has conventionally been a transistor circuit as shown in FIG. This transistor (Tr 1) of claim 6 is also a piezoelectric element by the reverse induction voltage generated in the coil (L 1) to the cut-off during (cut-off) during the vertical fall of the pulse signals a, that is the transistor (Tr 1) to be supplied to the It was to drive (P 1 ). 6b shows an example of this waveform.

제6도 a의 펄스의 상승에 의하여 트랜지스터(Tr1)가 "온"되고, 동 펄스의 강화에 의하여 트랜지스터가 컷 오프 된다. 이때 코일(Tr1)에는 제6도에 보이는 비교적 주파수가 높은 협폭(挾幅)의 감쇠특성을 보이는 역유기전압을 발생한다. 이와 같은 협폭의 펄스로 인하여 음압을 크게 얻을수 없다는 결점이 있었다. 그래서 코일(L1)의 권수를 증가시키면 저주파수가 얻어져 음압도 증가되지만, 권수의 증가에 따라서 스페이스가 증대되며 소형화를 요구하는 장치로는 좋지못한 것이었다. 특히, 소형의 전자 자명시계에부저(buzzer)로서 전압소자를 사용할 경우에는 부저의 수납스페이스는 제한되어 있으며, 상기와 같이 코일의 권수를 증가시킬 수 없는 경우가 있다.The transistor Tr 1 is turned "on" by the rise of the pulse of FIG. 6A, and the transistor is cut off by the strengthening of the same pulse. At this time, the coil Tr 1 generates a reverse organic voltage exhibiting a narrow attenuation characteristic with a relatively high frequency as shown in FIG. This narrow pulse has the drawback of not being able to obtain a large sound pressure. Therefore, if the number of turns of the coil L 1 is increased, a low frequency is obtained and the sound pressure is also increased. However, as the number of turns increases, the space increases, which is not good for a device requiring miniaturization. In particular, when a voltage element is used as a buzzer in a small magnetic alarm clock, the storage space of the buzzer is limited, and in some cases, the number of turns of the coil cannot be increased.

또한 구동회로로서 트랜스도 고려되지만 공간적으로 보아 바람직하지 못하다.A transformer is also considered as a driving circuit, but it is not preferable in terms of space.

그래서 본 고안의 목적은 코일에 다이오드를 직열로 접속시킴에 따라 권수가 적은 코일로 소요된 구동력을 얻을 수 있도록한 전압소자의 구동회로를 제공하는 것이다.Therefore, an object of the present invention is to provide a driving circuit of a voltage element that can obtain a driving force required by a coil with a small number of turns by connecting a diode to the coil in series.

이하 도면에 따라서 본 고안의 1실시예를 설명한다. 제1도에 있어서 단자(a)에는 제2도 a에 도시한 펄스신호가 공급되며 저항(R)을 통해트랜지스터(Tr2)의 베이스에 인가된다. 따라서 트랜지스터(Tr2)는 스위칭되며, 그것이 "오프"상태일 때 코일(L2)에 생기는 역유기전압이 다이오오드(d)의 순방향에 발생된다. 이것이 압전소자(P2)에 인가되며 이때의 전압파형을 도시한 것이 도면 제2도이다. 이 도면에서 명백하듯이 종래에 비해서 압전소자(P2)의 구동력이 증대되며 음압이 향상되어 있다.Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the pulse signal shown in FIG. 2A is supplied to the terminal a and is applied to the base of the transistor Tr 2 through the resistor R. As shown in FIG. Transistor Tr 2 is thus switched and a reverse organic voltage, which occurs at coil L 2 when it is in the " off " state, is generated in the forward direction of diode d. This is applied to the piezoelectric element P 2 and the voltage waveform at this time is shown in FIG. 2. As apparent from this figure, the driving force of the piezoelectric element P 2 is increased and the sound pressure is improved as compared with the related art.

이하 제5도에 표시한 종래의 전압 구동 회로와 본 실시예의 비교를 실험 데이터에 따라서 설명한다. 제3도는 압전소자인 압전 세라믹(m)을 접착시킨 금속진동판(n)의 평면도이다. 금속진동판(n)은 직경14mm, 두께 0.1mm의 스테인레스 재료이고, 압전세라믹(m)은 장변 10mm, 단변 2mm, 두께 0.2mm이고, 코일(L1) 및 (L2)는 각기 선경(線經) 0.05mm, 권수 1400회 이며, 트랜지스터(Tr1),(Tr2)의 콜렉터 전압은 1.5V이다. 그리고 금속진동판(n)을 공명 케이스에 수납하고 10cm 떨어진 지점에서 측정했을 때의 음압(P)와 트랜지스터에 인가되는 펄스의 주파수 f와의 관계를 도시한 것이 제4도이다. 곡선 A는 본 고안에 따른 장치일 경우이고, 곡선 B는 제5도의 구동회로의 경우이다. 이것에서 명백한 것처럼, 본 실시예의 음압은 제5도의 그것에 비해서 증대되어 있다.The comparison between the conventional voltage drive circuit shown in FIG. 5 and the present embodiment will be described according to the experimental data. 3 is a plan view of the metal vibrating plate n to which the piezoelectric ceramic m, which is a piezoelectric element, is bonded. The metal vibrating plate (n) is a stainless material having a diameter of 14 mm and a thickness of 0.1 mm. The piezoelectric ceramic (m) has a long side of 10 mm, a short side of 2 mm, and a thickness of 0.2 mm, and the coils L 1 and L 2 are wire diameters, respectively. ) 0.05mm, the number of turns 1400 times, the collector voltage of the transistors (Tr 1 ), (Tr 2 ) is 1.5V. 4 shows the relationship between the sound pressure P and the frequency f of the pulse applied to the transistor when the metal vibrating plate n is stored in the resonance case and measured at a point 10 cm apart. Curve A is for the device according to the present invention, and curve B is for the drive circuit of FIG. As is apparent from this, the sound pressure of the present embodiment is increased as compared with that of FIG.

이상의 실시예로 구동회로로서의 트랜지스터를 사용했으나, 이것에 한정되지 않고 스위칭 수단이면 무난하다.Although a transistor as a driving circuit is used in the above embodiments, it is not limited to this, and any switching means is acceptable.

이상상술한 바와 같이 본 고안은 구동회로의 출력측에 코일과 다이오드를 접속시키고, 이 양소자에 병열로 압전 소자를 접속시켰기 때문에 압전소자를 유효하게 구동시키며, 종래에 비해서 지극히 높은 음압이 얻어진다. 또 코일의 권수도 종래에 비해서 적어도 되기 때문에 소형의 장치 즉, 예를들면 스페이스의 제한을 받는 전자 자명시계의 발음장치로서 사용할 경우에는 매우 좋다.As described above, the present invention connects a coil and a diode to the output side of the driving circuit, and connects the piezoelectric elements in parallel in parallel to the two elements so that the piezoelectric elements are effectively driven, and an extremely high sound pressure is obtained as compared with the prior art. In addition, since the number of turns of the coil is also smaller than in the related art, it is very good when it is used as a small device, for example, a sounding device of an electronic alarm clock, which is limited in space.

Claims (1)

펄스신호의 공급을 받는 구동회로를 설치하고, 이 구동회로의 출력측에 코일을 설치하며, 이 코일에 병렬로 압전소자를 구성하여서된 압전소자의 구동회로에 있어서, 다이오드의 캐소우드를 코일의 트랜지스터와 연결되지 않는 단자에 연결하고 그 애노우드를 압전소자의 전압 공급단자와 만나는 점에 연결시켜서된 압전소자의 구동회로.In a driving circuit for a piezoelectric element in which a driving circuit that receives a pulse signal is provided, and a coil is provided on an output side of the driving circuit, and a piezoelectric element is formed in parallel with the coil, the cathode of the diode is converted into a transistor of the coil. A piezoelectric element driving circuit connected to a terminal which is not connected to and connected to the point where the anode is met with the voltage supply terminal of the piezoelectric element.
KR2019820004823U 1978-07-12 1982-06-19 Driving circuit of piezo-electric device KR820001824Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019820004823U KR820001824Y1 (en) 1978-07-12 1982-06-19 Driving circuit of piezo-electric device

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Application Number Priority Date Filing Date Title
KR1019780002155 1978-07-12
KR2019820004823U KR820001824Y1 (en) 1978-07-12 1982-06-19 Driving circuit of piezo-electric device

Related Parent Applications (1)

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KR1019780002155 Division 1978-07-12 1978-07-12

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