Development of a new kind of magnetic field model for wireless microrobots

In the industrial field and medical application, a wireless microrobot may be used in the small space and medical practice. In this paper, we proposed a new kind of magnetic field model, which can generate a rotation magnetic field directly and drive a microrobot. In addition, we proposed a spiral wireless microrobot, which can work in narrow area such as blood vessels in application to microsurgery. The developed microrobot with a spiral structure can get very strong force to move and has the characteristics such as compact volume, completely symmetrical mechanical structure, quick response, cleaning the dirt adhering to the inner wall, and long distance movement. We can just change the characteristic of input current to control movement of the microrobot easily. It can move smoothly in water or other liquid medium and we are able to achieve wireless, high efficiency energy supply. Then through the theoretical analysis and software simulation of the rotation magnetic field model, we verify the feasibility of the new model and the motion characteristics of microrobot. It will be very useful for industrial application and microsurgery.