CAJ | 학술논문

提出了一种新型微型杆式超声电机,并对该杆式电机的驱动机理进行了仿真.该电机采用两段金属柱体压紧5片压电陶瓷片作为定子.该定子结构和压电陶瓷片的布局方式可以提高其机电转换效率.为尽量减小定、转子之间的径向滑移以提高摩擦传动效率,电机采用了柔性转子,对原理样机及其微型驱动器进行了性能实验.电机的外径为9 mm,长度为15 mm,重3.2 g.当电机工作在杆式定子的一阶弯曲频率(72 kHz)附近时,电机实测最大转速为520 r/min,最大输出力矩为4.5 mN·m.实验结果表明,该电机具有良好的稳定性,利用频率自动跟踪技术对电机转速进行闭环控制,可以将其转速波动稳定在3%之内.
제출료일충신형미형간식초성전궤,병대해간식전궤적구동궤리진행료방진.해전궤채용량단금속주체압긴5편압전도자편작위정자.해정자결구화압전도자편적포국방식가이제고기궤전전환효솔.위진량감소정、전자지간적경향활이이제고마찰전동효솔,전궤채용료유성전자,대원리양궤급기미형구동기진행료성능실험.전궤적외경위9 mm,장도위15 mm,중3.2 g.당전궤공작재간식정자적일계만곡빈솔(72 kHz)부근시,전궤실측최대전속위520 r/min,최대수출력구위4.5 mN·m.실험결과표명,해전궤구유량호적은정성,이용빈솔자동근종기술대전궤전속진행폐배공제,가이장기전속파동은정재3%지내.
A new rod-shaped traveling wave ultrasonic micromotor is developed. In the micromotor, five pieces of piezoelectric ceramics clamped by two metal cylinders are used as its stator. The driving principle of the rod-shaped ultrasonic motor is simulated. The stator structure and the position to lay these piezoelectric ceramics are calculated to improve the electro mechanical conversion efficiency. A flexible rotor is designed to reduce the radial slip between the stator and the rotor, and to improve the motor efficiency. The prototype motor and its micro-driver are tested. The motor is 9 mm in out-diameter, 15 mm in length and 3.2 g in weight. When the motor operates with the first bending frequency (72 kHz) of the stator, its maximal rotational speed and the torque reach 520 r/min and 4.5 mN·m. Results show that the motor has good stability. The speed fluctuation is controlled within 3% by the frequency automatic tracking technique.