CAJ | 학술논문

提出一种U型变截面薄板结构驱动的压电直线超声电机，选定U板两纵杆的一阶反对称纵振和二阶对称弯振为工作模态。阐释了电机驱动机理，推导了定子驱动端椭圆运动轨迹；基于纵、弯工作模态频率一致性模型，优化了电机结构尺寸；通过谐响应分析及激光测振试验，证实了定子工作模态的存在及其纯正性；设计出电机装配结构，制作出其原型样机；构建电机驱动控制平台，驱动电机运转，验证电机原理的可行性。通过速度特性试验发现：当驱动频率为78．11 kHz且电压幅值为240 V时，电机最大运动速度可达125．6 mm/s。
제출일충U형변절면박판결구구동적압전직선초성전궤，선정U판량종간적일계반대칭종진화이계대칭만진위공작모태。천석료전궤구동궤리，추도료정자구동단타원운동궤적；기우종、만공작모태빈솔일치성모형，우화료전궤결구척촌；통과해향응분석급격광측진시험，증실료정자공작모태적존재급기순정성；설계출전궤장배결구，제작출기원형양궤；구건전궤구동공제평태，구동전궤운전，험증전궤원리적가행성。통과속도특성시험발현：당구동빈솔위78．11 kHz차전압폭치위240 V시，전궤최대운동속도가체125．6 mm/s。
A linear ultrasonic motor driven by a U-shaped thin plate structure (stator)with variable cross-sections was presented.The U-shaped stator's 1 st anti-symmetric longitudinal mode and 2nd symmetrical bending mode were taken as the motor's work modes.The driving principle of the motor was presented,and the elliptical obits of the drive ends of the stator used to push the motor's slider were derived.The optimal sizes of the motor based on the work modes'frequency consistency model were acquired.The motor's assemble structure was designed,and a prototype of the motor was made. Harmonic response analysis and the laser modal tests were performed to validate the existence of the stator's work modes. A drive system was constructed to drive the motor.It was shown that the motor can run well.Speed characteristic tests showed that the motor can run at the maximum speed of 125.6 mm/s as it is driven by an alternating voltage of 240 V with frequency of 78.1 1 kHz.