超声波电动机在核磁共振医疗设备中的应用  

Design of Ultrasonic-Motor in Magnetic Resonator Imaging Device

作　　者：董金宝[1] 张武 潘云华 张小亚 

机构地区：[1]西北工业大学,陕西西安710072 [2]西安创联超声技术有限责任公司,陕西西安710076

出　　处：《微特电机》2011年第7期18-20,共3页Small & Special Electrical Machines

摘　　要：针对核磁共振医疗设备中对执行电机无磁的特殊要求,利用超声波电动机不含线圈绕组通过摩擦耦合驱动原理,设计了一款无磁行波型超声波电动机。为了实现快速响应和精确定位,采用高精度绝对式编码器反馈转速和位置信号,控制上采用转速内环和位置外环的双闭环控制。硬件设计采用微芯PIC16F913单片机作为控制核心,最后制作样机,试验结果证明了控制设计方案的可靠性。Aimed at the special requirement of non-magnetic motor applied in nuclear magnetic resonator imaging （MRI）, a kind of non-magnetic Ultrasonic motor was designed using the characteristics of being without winding and drive by friction coupler. In order to get quick response and accurate positioning,a high precise encoder was applied with double closed-loop control method. The PIC161F913 was designed as control center. Finally the experiment result shows the feasibility of the proposal.

关 键 词：超声波电动机 编码器 PIC16F913 双闭环控制 

分 类 号：TM359.9[电气工程—电机]