CAJ | 학술논문

提出一款三棱柱形直线超声电机。电机定子为由二片压电陶瓷片黏接在三棱柱结构的弹性体上构成。每片压电陶瓷片产生的空间激励力都与两个工作模态的振动方向有一夹角，单片陶瓷片即能激励出两个工作振动模态，而且两者振动响应存在一个相位差。研究了电机定子驱动机制模型，推导了电机单相、两相激励时驱动质点的运动轨迹，分析了电机单相、两相驱动原理。对制作样机的机械性能进行了测试，试验表明电机可在较宽的频率范围内平稳运行，当驱动电压峰峰值为250V时，该电机单相、两相驱动的最大速度分别为2.2、2.5mm/s，最大输出力分别为0.156、0.192N，是定子质量的8.6倍、10.6倍。
제출일관삼릉주형직선초성전궤。전궤정자위유이편압전도자편점접재삼릉주결구적탄성체상구성。매편압전도자편산생적공간격려력도여량개공작모태적진동방향유일협각，단편도자편즉능격려출량개공작진동모태，이차량자진동향응존재일개상위차。연구료전궤정자구동궤제모형，추도료전궤단상、량상격려시구동질점적운동궤적，분석료전궤단상、량상구동원리。대제작양궤적궤계성능진행료측시，시험표명전궤가재교관적빈솔범위내평은운행，당구동전압봉봉치위250V시，해전궤단상、량상구동적최대속도분별위2.2、2.5mm/s，최대수출력분별위0.156、0.192N，시정자질량적8.6배、10.6배。
A triangular prism shaped linear ultrasonic motor was proposed. The stator comprises a triangular prism shaped elastic body and two piezoelectric ceramics, which are attached to the two outer surfaces of the elastic body. The spatial excitation force generated by each piezoelectric ceramic is at an angle with respect to the vibration direction of each working mode. Each piezoelectric ceramic can excite the two working vibration modes. And there is a phase difference between the vibration responses. A model for the driving mechanism of the motor was developed. The expressions of motion trajectory of the driving points were formulated when the stator was excited by single-phase or two-phase electrical sources. Driving principle of the motor with single-phase and two-phase excitation was analyzed. The performance of a prototype motor was measured. The experimental results show that the motor can operate smoothly in a wide frequency range. When the motor is driven by single-phase and two-phase electrical sources at a voltage of 250V (peak-to-peak), the speeds without load are 2.2 and 2.5mm/s, and the maximum output forces are 0.156 and 0.192N, which are 8.6 times and 10.6 times of the stator weight respectively.