JPH0260492U - - Google Patents
Info
- Publication number
- JPH0260492U JPH0260492U JP13749988U JP13749988U JPH0260492U JP H0260492 U JPH0260492 U JP H0260492U JP 13749988 U JP13749988 U JP 13749988U JP 13749988 U JP13749988 U JP 13749988U JP H0260492 U JPH0260492 U JP H0260492U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- control signal
- ultrasonic actuator
- secondary coil
- driving current
- 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
- 238000010586 diagram Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 1
Description
第１図はこの考案の一実施例である超音波アク
チエータ駆動回路の構成を示すブロツク図、第２
図は同実施例における可変インダクタンス回路の
各部の波形を示す波形図、第３図は従来の駆動回
路の構成を示す回路図である。
１……発振回路、２，３，４……１／２分周回
路、５，６……アンプ、７……超音波アクチエー
タ、ＳＷ……スイツチ。
Figure 1 is a block diagram showing the configuration of an ultrasonic actuator drive circuit that is an embodiment of this invention.
The figure is a waveform diagram showing the waveforms of various parts of the variable inductance circuit in the same embodiment, and FIG. 3 is a circuit diagram showing the configuration of a conventional drive circuit. 1...Oscillation circuit, 2, 3, 4...1/2 frequency dividing circuit, 5, 6...Amplifier, 7...Ultrasonic actuator, SW...Switch.
Claims (1)
ツチングすることにより、２次コイルから駆動電
流を発生させ、この駆動電流を圧電体に設けられ
た電極に供給する超音波アクチユエータの駆動回
路において、前記２次コイルの両端間に設けられ
、所定の制御信号に応じてインダクタンス値が変
動する可変インダクタンス回路と、前記電極間容
量と前記可変インダクタンス回路との並列共振状
態が維持できるように前記２次コイルの出力周波
数に応じて前記制御信号の値を調整する制御回路
とを具備することを特徴とする超音波アクチエー
タの駆動回路。 In the driving circuit of the ultrasonic actuator, the driving current is generated from the secondary coil by switching the power supplied to the primary coil of the transformer, and this driving current is supplied to the electrode provided on the piezoelectric body. A variable inductance circuit that is provided between both ends of the secondary coil and whose inductance value varies according to a predetermined control signal, and a parallel resonance state between the interelectrode capacitance and the variable inductance circuit can be maintained. 1. A drive circuit for an ultrasonic actuator, comprising: a control circuit that adjusts the value of the control signal according to an output frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13749988U JPH0260492U (en) | 1988-10-21 | 1988-10-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13749988U JPH0260492U (en) | 1988-10-21 | 1988-10-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0260492U true JPH0260492U (en) | 1990-05-02 |
Family
ID=31398976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13749988U Pending JPH0260492U (en) | 1988-10-21 | 1988-10-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0260492U (en) |
-
1988
- 1988-10-21 JP JP13749988U patent/JPH0260492U/ja active Pending