基于磁外科理念的永磁旋转磁场发生器的研制

Objective To design a NdFeB permanent magnetic rotating magnetic field generator based on the concept of magnetic surgery, to facilitate the exploration of research on the biological effects of rotating magnetic fields. Methods First of all, it was determined that the generator adopted integrated fuselage controller, driver, servo motor, planetary reducer, A3 steel turntable and single-stage magnet scheme. Secondly, the components were designed and selected. Finally, the feasibility of the scheme was verified by checking and calculating the torque and moment of inertia of the motor. The magnetic field distribution and the maximum norm of magnetic flux density in the upper surface area of the PC board cover were simulated by COMSOL software. Results The physical construction was carried out, and the equipment ran normally. The average error between the measured maximum value of the magnetic flux density mode in the upper surface area of the PC plate cover and the COMSOL simulation value was 4.1 mT, and the root mean square error was 6.1 mT. It showed that the simulation results were basically consistent with the actual results. Conclusion This scheme has the advantages of high integration, small space size, stepless speed regulation, easy operation, high magnetism, mobility, low cost, and can be widely used in research related to the biological effects of rotating magnetic fields in the field of magnetic surgery.