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| Self-driving linear ultrasonic motor with double vibrators |
| LU Cun-yue1, WEI Yan-ding1, GUO Ji-feng1, HU Jin-yun2, LI Jin-liang1 |
1. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;
2. Department of Physics, Tsinghua University, Beijing 100084, China |
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Abstract A self-driving linear ultrasonic motor with double vibrators was developed. The stator consists of two vibrators and a mass. The mass is in the middle of the stator. Each vibrator is symmetrically connected with one side of the mass by a slender shaft. The bending vibrations of two vibrators inspire a wobbling motion of the mass. Therefore, the locus of particles on the driving head is an ellipse. The friction force between the mass and the leader drives the motor moving itself. The measured local bending resonant frequency of the mass is about 20 792Hz, and that of the stator is about 40 420Hz. Emulation results showed that when the local bending resonant mode of the mass is used as working mode, the vibration amplitude of the mass is large. Experimental results showed that the driving speed of the motor is high and the motor can work stably with little temperature rise when the mass working in the local bending resonant mode. But when the bending resonant mode of the stator is used as working mode, the temperature rise of the stator is high, therefore the motor cannot work stably. The characteristics of the prototype motor were measured experimentally. The maximum speed of the motor is about 598mm/s, and the maximum driving force is over 1-94N, when the phase difference of the applied two signals is 90° and the peak to peak driving voltage is 138 V at the frequency of 20-8kHz.
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Published: 28 September 2009
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双振子自走型直线超声电机的研究
设计了一种双振子自走型直线超声电机,电机的定子由2个同轴的对称布置的弯曲摇头型振子和中部带细颈的柔性振动块组成.2个振子的弯曲振动会激励出中间振动块的摇头振动,使驱动头上的质点产生椭圆运动轨迹,与导轨摩擦接触产生自走直线运动.测量得到定子上振动块的局部弯曲共振频率为20 792Hz,定子的弯曲共振频率约为40 420Hz.仿真发现,以振动块的局部弯曲共振模态作为工作模态能够得到更大的振幅.实验结果表明,在该模态频率下,电机可以提供较大的驱动速度,发热很少,较长时间工作仍旧稳定可靠,故被选作工作模态.在40 420Hz附近电机能够驱动,但是振子发热严重,不易稳定工作.当两相驱动信号的频率为20.8kHz、相位差为90°、驱动信号电压的峰峰值为138V时,电机的驱动速度达到598mm/s,电机的最大驱动力达到1.94N.
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| [1] MORITA T. Miniature piezoelectric motors [J]. Sensors and Actuators, 2003, 103(3): 291300.
[2] UEHA S, TOMIKAWA Y, KOROSAWA M, et al. Ultrasonic motors: theory and application [M]. Oxford: Clarendon Press, 1993.
[3] 赵淳生. 超声电机技术与应用[M]. 北京:科学出版社, 2007.
[4] MANCEAU J F, BASTIEN F. Linear motor using a quasi-travelling wave in a rectangular plate [J]. Ultrasonics, 1996, 34(2-5): 257-260.
[5] ROH Y, LEE S, HAN W. Design and fabrication of a new traveling wave-type ultrasonic linear motor [J]. Sensors and Actuators, 2001, 94(3): 205-210.
[6] YUN C. A high power ultrasonic linear motor using a longitudinal and bending hybrid bolt-clamped Langevin type transducer [J]. Japanese Journal of Applied Physics, 2001, 40(5B): 3773-3776.
[7] TSAI M, LEE C, HWANG S. Dynamic modeling and analysis of a bimodal ultrasonic motor [J]. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2003, 50(3): 199-203.
[8] KRUSAWA M, TAKAHASHI M, HIGUCHI T. Friction drive surface acoustic wave motor [J]. Ultrasonics, 1996, 34(2-5): 243-246.
[9] ROHA Y, KWON J. Development of a new standing wave type ultrasonic linear motor [J]. Sensors and Actuators, 2004, 112(2/3): 196-202.
[10] SNIKA V. Ultrasonic actuators for nanometre positioning [J]. Ultrasonics, 2000, 38(1): 20-25.
[11] KIM J, KIM J D, CHOI S. A hybrid inchworm linear motor [J]. Mechatronics, 2002, 12(4): 525-542. |
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