Yao K, Koc B, Uchino K
International Center for Actuators and Transducers (ICAT), Materials Research Laboratory, Pennsylvania State University, University Park, PA 16802, USA.
IEEE Trans Ultrason Ferroelectr Freq Control. 2001 Jul;48(4):1066-71. doi: 10.1109/58.935724.
Longitudinal-bending mode ultrasonic motors with a diameter of 3 mm were fabricated using stacked multilayer piezoelectric actuators, which were self-developed from hard lead zirconate titanate (PZT) ceramic. A bending vibration was converted from a longitudinal vibration with a longitudinal-bending coupler. The motors could be bidirectionally operated by changing driving frequency. Their starting and braking torque were analyzed based on the transient velocity response. With a load of moment of inertia 2.5 x 10(-7) kgm2, the motor showed a maximum starting torque of 127.5 microNm. The braking torque proved to be a constant independent on the motor's driving conditions and was roughly equivalent to the maximum starting torque achievable with our micromotors.
采用由硬锆钛酸铅（PZT）陶瓷自行研制的叠层多层压电致动器，制造出了直径为3毫米的纵向弯曲模式超声波电机。通过纵向 - 弯曲耦合器将纵向振动转换为弯曲振动。通过改变驱动频率，电机可双向运行。基于瞬态速度响应分析了它们的启动和制动扭矩。在转动惯量为2.5×10⁻⁷ kg·m²的负载下，该电机的最大启动扭矩为127.5微牛米。结果表明，制动扭矩是一个与电机驱动条件无关的常数，大致相当于我们的微型电机所能达到的最大启动扭矩。
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