| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the movement or a micro-robot in a pipe in which liquid is contained, etc., by a method, wherein an exciter which supplies a flux to the stator of a stepper motor, in accordance with the number of poles of the motor, is provided outside a nonmagnetic pipe. SOLUTION: If a positive/negative exciting current is supplied to a coil 210, a magnetic flux corresponding to the current is induced in a coil stator 28 and the magnetic flux is applied to a motor stator 202 through a nonmagnetic pipe 206 for turning a rotor 204. A screw is turned, or the flow of liquid is produced by the rotation of the rotor 204. If the coil stator 208 is moved in the longitudinal direction of the nonmagmetic pipe 206, an operation motor 200 itself is also moved following the movement of the coil stator 208 by the magnetic force of the magnetic fild of the coil stator 208, Therefore, the position of a micro-robot main part 10 can be controlled by the application of the external magnetic field. Further. as the operation motor 200 can be driven by the application of the external magnetic field, it is not necessary to provide a means (battery) which stores an energy for driving the operation motor 200 on the micro-robot main part 200. |
