機械的な摩擦を介さない非接触形の超音波モータに関する研究

无机械摩擦非接触式超声波电机研究

• 批准号: 04650336
• 负责人: HIROSE Seiji
• 金额: $ 1.34万
• 依托单位: Yamagata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650336/
• 关键词: Ultrasonic Motor; Non-contact; Radiation Pressure; Piezoelectric transducer; Interdigital Electrodes; Miniaturized Motor

We have studied the non-contact type ultrasonic motors which are constructed of the stator and the rotor set with a small gap about zero point several mm between them. It is considered that the driving force of this type ultrasonic motors is given by the radiation pressure of the sound wave radiated from the stator vibrator. The stator vibrator is made of the piezoelectric ceramic disk and vibrating in the direction vertical to the disk surface. The vibration mode is the B_<03> mode which is one of the flexural vibrations of the disk.In the disk, there exist two degenerated B_<03> modes whose mode patterns are perpendicular to each other. Hence, when the two input signals with 90ﾟC phase difference are applied to the different two electrodes which are prepared for driving each B_<03> mode, the vibration mode rotors in the circumferential direction. As a result, the rotor set with a small gap on the stator vibrator rotates in the same direction as the vibration mode rotation. The revolution speed achieved about 3,000r.p.m. under 80V_<p-p> input voltage. The size of this ultrasonic motor was rather large ; that is, the diameter was 20mm and the thickness was 2mm.Then, two small non-contact type ultrasonic motors have been investigated. The size of one of the small-sized non-contact ultrasonic motors is 10mm in diameter and 1mm in thickness. Another ultrasonic motor was miniaturized similarly to the size of 5mm in diameter and 0.5mm in thickness. The ultrasonic motor of 10mm diameter rotated in about 1,500r.p.m.revolution speed under 8V_<p-p> input AC(68KHz) signal.The revolution speed of 5mm diameter ultrasonic motor was about 4,000r.p.m. under 30V_<p-p> input AC(136KHz) signal. Moreover, much smaller non-contact ultrasonic motors of 2mm in diameter ahs been rotated int hespeedofabout 700r.p.m.

我们研究了非接触式超声波电机，其由定子和转子组构成，它们之间有大约零点几毫米的小间隙。认为这种类型的超声波电机的驱动力由从定子振动器辐射的声波的辐射压力给出。定子振动器由压电陶瓷圆盘制成，并沿垂直于圆盘表面的方向振动。振动模式为B_<03>模式，它是盘的弯曲振动之一。在盘中，存在两种简并B_<03>模式，其模式图案彼此垂直。因此，当将具有90°C相位差的两个输入信号施加到为驱动每个B_<03>模式而准备的不同的两个电极时，振动模式转子沿圆周方向旋转。结果，定子振动器上设置有小间隙的转子沿与振动模式旋转相同的方向旋转。转速达到约3,000r.p.m。在80V_<p-p>输入电压下。这个超声波马达的体积比较大，即直径为20mm，厚度为2mm。然后，研究了两种小型非接触式超声波电机。其中一种小型非接触式超声波电机的尺寸为直径10mm、厚度1mm。另一种超声波马达也同样小型化至直径5mm、厚度0.5mm的尺寸。直径10mm的超声波电机在8V_<p-p>输入交流(68KHz)信号下以约1,500r.p.m.的转速旋转。直径5mm的超声波电机的转速约为4,000r.p.m.。在30V_<p-p>输入AC(136KHz)信号下。此外，直径为 2mm 的更小的非接触式超声波电机以约 700r.p.m 的速度旋转。

项目成果

広瀬 精二: "圧電セラミック振動子の大振幅励振時における誘電体損失 誘電体損失の増加と励振方法に関する一考察" 電子情報通信学会技術報告. US92-42. 15-20 (1992)

Seiji Hirose：“压电陶瓷振动器大振幅激励期间的介电损耗。介电损耗增加和激励方法的研究” IEICE 技术报告 15-20 (1992)。

S.Sone: "An analysis on Driving Force and Optimum Frequency of the Non-contact Type Ultrasonic Motor" Proc. of 1993 Autumn Meeting of Acoust. Society of Japan. II. 1089-1090 (1993)

S.Sone：“非接触式超声波电机的驱动力和最佳频率的分析”Proc。

広瀬 精二: "圧電振動子のハイパワー特性の自動測定" 電子情報通信学会技術報告. US92-3. 17-22 (1992)

Seiji Hirose：“压电振动器高功率特性的自动测量”IEICE 技术报告17-22 (1992)。

Y.Yamayoshi: "Ultrasonic motor not using mechanical friction force" International Journal of Applied Electromagnetics in Materials. 3. 179-182 (1992)

Y.Yamayoshi：“不使用机械摩擦力的超声波电机”国际材料应用电磁学杂志。

山吉 康弘: "非接触型超音波モータのトルク特性" 日本音響学会 平成4年度秋季研究発表会 講演論文集. II. 1101-1102 (1992)

Yasuhiro Yamayoshi：“非接触式超声波电机的扭矩特性”日本声学学会1992年秋季研究会议论文集II 1101-1102（1992）。