CAJ | 학술논문

提出一种基于夹心变截H式定子的直线电机,选定定子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解析方程；建立了定子参数化有限元模型,进行了定子模态频率灵敏度分析,实现了纵、弯模态匹配及频率一致性；设计出定子基本尺寸为37 mm ×60 mm,规划出定子压电陶瓷极化供电方案,厘定电机驱动频率点为49 kHz。通过施加电压载荷对定子振动特性进行了数值仿真,求得定子在200 V电机激励下的纵、弯工作振幅为8μm和6μm,模拟出驱动端椭圆轨迹,验证了电机原理可行性,为样机的研制提供了理论依据。
제출일충기우협심변절H식정자적직선전궤,선정정자일계반대칭종진화이계대칭만진위공작모태。천석료전궤구동궤리,추도료정자구동단타원운동해석방정；건립료정자삼수화유한원모형,진행료정자모태빈솔령민도분석,실현료종、만모태필배급빈솔일치성；설계출정자기본척촌위37 mm ×60 mm,규화출정자압전도자겁화공전방안,전정전궤구동빈솔점위49 kHz。통과시가전압재하대정자진동특성진행료수치방진,구득정자재200 V전궤격려하적종、만공작진폭위8μm화6μm,모의출구동단타원궤적,험증료전궤원리가행성,위양궤적연제제공료이론의거。
A Langevin type H-shaped linear ultrasonic stator powered by its 1st anti-symmetric longitudinal mode and 2nd symmetrical bending modes was proposed. The motor’ s driving principle was detailed, and elliptical trajectory generated by particles on stator drive ends was derived. A FEM model was built to investigate the stator dynamic characteristics, so that the modal frequency sensitivities to some key geometric dimensions of stator were figure out, which results in longitudinal and bending working modal frequency being consistent. The stator’ s primary dimension was designed to be 37 mm × 60 mm, and the motor’ s operating frequency is 49 kHz. Simulations were executed to work out the longitudinal and bending working modal vibration amplitudes to 8 μm and 6 μm on condition of 200 voltages, and to demonstrate the elliptical trajectories on driving ends, which validate the feasibility of the motor. This motor is expected to be used in precision positioning fields.