JPS59148583A - Drive circuit for piezoelectric vibrator - Google Patents
Drive circuit for piezoelectric vibratorInfo
- Publication number
- JPS59148583A JPS59148583A JP58022569A JP2256983A JPS59148583A JP S59148583 A JPS59148583 A JP S59148583A JP 58022569 A JP58022569 A JP 58022569A JP 2256983 A JP2256983 A JP 2256983A JP S59148583 A JPS59148583 A JP S59148583A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- piezoelectric vibrator
- resonance
- resonance point
- drive
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
- H02N2/0075—Electrical details, e.g. drive or control circuits or methods
- H02N2/008—Means for controlling vibration frequency or phase, e.g. for resonance tracking
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は圧電振動子の駆動回路にｊ３ｉ Ｌ、特に土亀
七−夕に用いて好適なもので６る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is suitable for use in a drive circuit for a piezoelectric vibrator, particularly for the Tsuchikame Tanabata festival.
背景技術とその問題点
圧電振動子に例えば数１０ＫＨｚ の駆動電圧を加えて
、この圧電振動子全伸縮振動又は厚み振動させ、この振
動でロータ等の被駆動体音押圧駆動することにより、被
駆動体を回転又は直線移動させるようにした圧電モータ
が知られている。このような圧″屯モータにおける圧電
振動子の駆動回路として、例えは第１図に示すものか用
いられる。BACKGROUND TECHNOLOGY AND PROBLEMS A drive voltage of, for example, several tens of KHz is applied to a piezoelectric vibrator to cause the piezoelectric vibrator to vibrate in its entire extension and contraction or in its thickness, and by using this vibration to press and drive a driven body such as a rotor, the driven body can be 2. Description of the Related Art Piezoelectric motors that rotate or linearly move a body are known. As a drive circuit for a piezoelectric vibrator in such a piezoelectric motor, the one shown in FIG. 1 is used, for example.
この駆動回路は電流帰還型自励発振回路を構成するもの
で、（１）は圧電振動子、（２）はｉｔ流検出抵抗。This drive circuit constitutes a current feedback type self-excited oscillation circuit, where (1) is a piezoelectric vibrator and (2) is an IT current detection resistor.
（３）はノイズ除去用のローパスフィルタで、そのカッ
トオフ周波数は圧電振動子（１）の共振周波数ｆＲ付近
に選はれている。（４）は移相回路で、ローパスフィル
タ（３）Ｋよる位相回り？補償する。（５）は飽和状態
で動作されるインバータアンプである。上記構成によっ
てループゲインが１以上で、入出力が同位相の自励発振
ループが形成され、圧電振動子（１）は所定の周波数ｆ
Ｒで共振する。(3) is a low-pass filter for removing noise, and its cutoff frequency is selected near the resonance frequency fR of the piezoelectric vibrator (1). (4) is a phase shift circuit, and the phase rotation by low pass filter (3) K? Compensate. (5) is an inverter amplifier operated in a saturated state. With the above configuration, a self-excited oscillation loop with a loop gain of 1 or more and input and output in the same phase is formed, and the piezoelectric vibrator (1) has a predetermined frequency f.
Resonates with R.
この方式による駆動は、モータに組み込んた時の圧電振
動子の共振点でのメカニカルＱが高く、なおかつその共
振点近傍に高いＱ’にもつ他の共振点が存在しない場合
に限られている。Driving using this method is limited to cases where the piezoelectric vibrator has a high mechanical Q at its resonance point when incorporated into a motor, and there is no other resonance point with a high Q' near the resonance point.
っまシ共振点でのメカニカルＱが低かったシ、他の共振
点があったシすると、電流帰還型自励発振回路の発振周
波数が最も効率の良い共振周波数からはずれる場合があ
り、この時モータを駆シりする事は不可能となる。第１
図の駆動回路金笑際の圧電モータに組み込むと、圧電振
動子のメカニカルＱは低くな９、そのアドミタンス特性
は第２図に示すように、共振周波数ｆＲにおけるヒータ
が抑えられたものとなる。このため温度変化や負荷変動
等によって、圧電撮動子の振動周波数がずれ易くなり、
所定の周波数ｆＲで共振させることが困難となっていた
。If the mechanical Q at the resonance point is low or there are other resonance points, the oscillation frequency of the current feedback self-excited oscillation circuit may deviate from the most efficient resonance frequency, and at this time the motor It becomes impossible to drive. 1st
When incorporated into the piezoelectric motor shown in the drive circuit shown in the figure, the mechanical Q of the piezoelectric vibrator is low9, and its admittance characteristic suppresses heating at the resonant frequency fR, as shown in FIG. For this reason, the vibration frequency of the piezoelectric sensor tends to shift due to temperature changes, load fluctuations, etc.
It has been difficult to cause resonance at a predetermined frequency fR.
発明の目的
本発明は所望の共振点でのメカニカルＱが低かったｐ、
近傍に他の共振点が存在している場合のように、共振点
全捉え蛯い状態で使用される圧゛亀振動子に用いて好適
な駆動回路全提供するものである。Purpose of the Invention The present invention provides a low mechanical Q at a desired resonance point.
The present invention provides a drive circuit suitable for use in a pressure-transducer vibrator that is used in a state in which all resonance points are captured, such as when other resonance points exist nearby.
発明の概要
本発明はスィーブ′亀圧で網波数制御される駆動信号に
よυ、圧′亀振動子會躯動するようにし次もので、圧電
振動子の所定の共振点全確実に捉えることができる。SUMMARY OF THE INVENTION The present invention uses a drive signal controlled by a network wave number based on a sweve's tortoise pressure to cause a υ, pressure torso vibrator to rotate, thereby reliably capturing a predetermined resonance point of a piezoelectric vibrator. I can do it.
実施ｔクリ
第６図におい℃、スィーブ電圧発生器（６）は、周期Ｔ
、レベルＢｋＷする三角波又はのこぎシ波のスィーブ電
圧（７）全出力して、電圧制御発振器（８）の発振周波
数を制御する。この電圧制御発振器（８）は、第２図に
おいて共振周波数ｆｎｋｎ中略としてｆＬからｆＨまで
の範囲で周波数変調される発振出力信゛号（９）全出力
する。この信号（９）はアンプ俣０）全通じて圧電撮動
子（１）全駆動する。In FIG. 6, the sweep voltage generator (6) has a period T
, a triangular wave or sawtooth wave sweep voltage (7) of level BkW is fully output to control the oscillation frequency of the voltage controlled oscillator (8). This voltage controlled oscillator (8) fully outputs an oscillation output signal (9) which is frequency modulated in the range from fL to fH, where the resonance frequency fnkn in FIG. 2 is indicated. This signal (9) fully drives the piezoelectric sensor (1) through the entire amplifier block (0).
以上によれは、上記信号（９）の周波数は必ずｆＲを通
過するので、圧電振動子（１）の共振点全確実に捉える
ことができる。According to the above, since the frequency of the signal (9) always passes through fR, the entire resonance point of the piezoelectric vibrator (1) can be detected with certainty.
応用例
本発明は所望の共振点でのメカニカルＱが低かったυ、
あるいは近傍に他の共振点が存在している場合等のよう
に、共振点が捉え難い状態で使用される圧電振動子洗用
いて特に効果が得られる。Application example The present invention has a low mechanical Q at the desired resonance point υ,
This method is especially effective when using a piezoelectric vibrator that is used in a situation where the resonance point is difficult to detect, such as when there are other resonance points nearby.
発明の効果
温度変化や負荷変動により駆動共振周波数が変化しても
、幅のあるスィーブ信号全印加しているので、必ず共振
点會捉えることができる。特に圧ｔａ動子のメカニカル
Ｑの低い圧電モータや、駆動共振周波数の近傍に他の共
振点のおるような圧電モータ、すなわち電流帰還型自励
発振回路による駆動が出来ない圧電モータの安定で確実
な７％ 声りを可能にする０Effects of the Invention Even if the drive resonance frequency changes due to temperature changes or load fluctuations, the resonance point can always be captured because the entire width of the sweep signal is applied. In particular, it is stable and reliable for piezoelectric motors with a low mechanical Q of the piezo actuator, piezoelectric motors with other resonance points near the drive resonance frequency, or piezoelectric motors that cannot be driven by a current feedback self-excited oscillation circuit. 7% Enables vocalization 0
第１図は従来のｈμ動回路の−シ１ｊ？示すフ“ロック
図、第２図は圧電振動子のアドミタンス特性図、第６図
は本発明の実施例７示すフ”ロック図である０なお山面
に用いられている符号において、（１）・・・・・・・
・・・・圧゛亀振動子（６）・・・・・・・・・・・ス
ィーブ電圧発生器（８）・・・・・・・・・・・電圧制
御発振器である。
代 理 人 土 屋 勝當 包
芳 男
〃 杉 浦 俊 貴−揉FIG. 1 shows the -shi1j? of a conventional hμ motion circuit. FIG. 2 is an admittance characteristic diagram of a piezoelectric vibrator, and FIG. 6 is a flock diagram showing Embodiment 7 of the present invention.・・・・・・・・・
. . . Pressure turtle oscillator (6) . . . Swive voltage generator (8) . . . Voltage controlled oscillator. Agent Katsuto Tsuchiya
Yoshio Takashi Sugiura
Claims (1)
振動子を駆動するようにしたことを特徴とする圧ｔｍ動
子の駆動回路。A drive circuit for a piezoelectric transducer, characterized in that a piezoelectric vibrator is driven by a drive signal whose frequency is controlled by a sweep voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58022569A JPS59148583A (en) | 1983-02-14 | 1983-02-14 | Drive circuit for piezoelectric vibrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58022569A JPS59148583A (en) | 1983-02-14 | 1983-02-14 | Drive circuit for piezoelectric vibrator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59148583A true JPS59148583A (en) | 1984-08-25 |
| JPH0516272B2 JPH0516272B2 (en) | 1993-03-03 |
Family
ID=12086502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58022569A Granted JPS59148583A (en) | 1983-02-14 | 1983-02-14 | Drive circuit for piezoelectric vibrator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59148583A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634191U (en) * | 1986-06-23 | 1988-01-12 | ||
| JPH02276481A (en) * | 1989-04-18 | 1990-11-13 | Alps Electric Co Ltd | Drive circuit for ultrasonic linear actuator |
| EP1184197A1 (en) | 2000-09-01 | 2002-03-06 | Konica Corporation | Inkjet recording apparatus and inkjet recording method |
| EP1617489A1 (en) * | 2004-07-12 | 2006-01-18 | Seiko Epson Corporation | Method, apparatus and control program for driving a piezoelectric actuator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6066749B2 (en) * | 2013-01-30 | 2017-01-25 | シチズン時計株式会社 | Sphygmomanometer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49110288A (en) * | 1973-02-20 | 1974-10-21 | ||
| JPS5029290A (en) * | 1973-07-20 | 1975-03-25 | ||
| JPS5315872A (en) * | 1976-07-28 | 1978-02-14 | Yokogawa Hokushin Electric Corp | Dew detector |
| JPS5610792A (en) * | 1979-07-06 | 1981-02-03 | Taga Denki Kk | Method and circuit for driving ultrasonic-wave converter |
-
1983
- 1983-02-14 JP JP58022569A patent/JPS59148583A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49110288A (en) * | 1973-02-20 | 1974-10-21 | ||
| JPS5029290A (en) * | 1973-07-20 | 1975-03-25 | ||
| JPS5315872A (en) * | 1976-07-28 | 1978-02-14 | Yokogawa Hokushin Electric Corp | Dew detector |
| JPS5610792A (en) * | 1979-07-06 | 1981-02-03 | Taga Denki Kk | Method and circuit for driving ultrasonic-wave converter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634191U (en) * | 1986-06-23 | 1988-01-12 | ||
| JPH02276481A (en) * | 1989-04-18 | 1990-11-13 | Alps Electric Co Ltd | Drive circuit for ultrasonic linear actuator |
| EP1184197A1 (en) | 2000-09-01 | 2002-03-06 | Konica Corporation | Inkjet recording apparatus and inkjet recording method |
| EP1617489A1 (en) * | 2004-07-12 | 2006-01-18 | Seiko Epson Corporation | Method, apparatus and control program for driving a piezoelectric actuator |
| US7348708B2 (en) | 2004-07-12 | 2008-03-25 | Seiko Epson Corporation | Drive method for piezoelectric actuator, drive apparatus for piezoelectric actuator, electronic device, control program for drive apparatus for piezoelectric actuator, and recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0516272B2 (en) | 1993-03-03 |
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