Research of the operation support arm corresponding to MRI using hollow type ultrasonic motor driving system

一种采用中空式超声波电机丝杠系统控制的手术支撑臂。该系统不需要减速齿轮，可实现精确的位置控制。此外，当它不为电机供电时，它还可以作为固定臂使用。用钛或硬铝制作这只手臂，减少了图像对MRI的影响。研制了一种可实现精确定位的变频超声波电机控制电路。

An operation support arm control by lead screw system using hollow type ultrasonic motor. By using this system, slowdown gear is not needed and precise position control can be performed. Moreover, when it doesn't supply the power supply to the motor, it can use as fixed arm. Manufacturing this arm using titanium or duralumin, influence of the picture on MRI was reduced. The ultrasonic motor control circuit using the variable frequency which can perform precise positioning was developed.