Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario, Canada M5B 2K3.
Ultrasonics. 2012 Sep;52(7):880-9. doi: 10.1016/j.ultras.2012.02.010. Epub 2012 May 16.
This paper reports a standing wave brass-PZT tubular ultrasonic motor. The motor is composed of a brass square tube with two teeth on each tube end. Four PZT plates are attached to the outside walls of the brass tube. The motor requires only one driving signal to excite vibration in a single bending mode to generate reciprocating diagonal trajectories of teeth on the brass tube ends, which drive the motor to rotate. Bi-directional rotation is achieved by exciting different pairs of PZT plates to switch the bending vibration direction. Through using the brass-PZT tube structure, the motor can take high magnitude vibration to achieve a high output power in comparison to PZT tube based ultrasonic motors. Prototypes are fabricated and tested. The dimension of the brass-PZT tube is 3.975mm×3.975mm×16mm. Measured performance is a no-load speed of >1000RPM, a stall torque of 370μNm and a maximum output power of 16 mW when a sinusoidal driving voltage of 50V is applied. The working frequencies of the motor are 46,050Hz (clockwise) and 46,200Hz (counter-clockwise).
本文报道了一种驻波式铜管- PZT 管状超声马达。该马达由铜管两端各带有两个齿的铜管构成。四个 PZT 板附着在铜管的外壁上。该马达仅需一个驱动信号即可激励单一弯曲模态的振动，从而产生铜管端齿的往复对角轨迹，从而驱动马达旋转。通过激励不同的 PZT 板对来切换弯曲振动方向，实现双向旋转。通过使用铜管-PZT 管结构，与基于 PZT 管的超声马达相比，该马达可以承受高幅度的振动，从而实现高输出功率。制作并测试了原型。铜管-PZT 管的尺寸为 3.975mm×3.975mm×16mm。当施加 50V 的正弦驱动电压时，测量的性能为空载速度>1000RPM、失速转矩为 370μNm 和最大输出功率为 16mW。该马达的工作频率为 46050Hz（顺时针）和 46200Hz（逆时针）。
