The magnetic flux PI is proportional to the magnetic field produced by the solenoid, and the magnetic flux affects the force exerted by the magnetic field. Therefore, in the case of multi-layered solenoids, it is necessary to use a more accurate formu...
The magnetic flux PI is proportional to the magnetic field produced by the solenoid, and the magnetic flux affects the force exerted by the magnetic field. Therefore, in the case of multi-layered solenoids, it is necessary to use a more accurate formula than a single-layer in order to find the magnetic field and force.
In this study, the magnetic field on the solenoid axis of the multi-layered solenoid and the magnetic force acting between the magnet and the multi-layered solenoid were theoretically calculated. The simulation using Wolfram Mathematica for the magnetic field on the axis of the multiple layer solenoid and the magnetic force acting between the magnet and the solenoid has been done. Via simulations, we tried to show more accurate magnetic fields and magnetic forces when multi-layered solenoids are used.
Simulation results show that the magnetic field and the maximum value of the magnetic forces are not proportional to the number of layers K.
Using the formula modified for a multi-layered solenoid, when the length of solenoid L is the same and the number of layers (K) is different, the magnetic fields of multi-layered solenoids is smaller than K times of magnetic field of the single-layered solenoid. Similarly, the force was found to be smaller than K times. When the wound number N is same and K is different, the magnetic fields maximum value at the solenoid center are generally smaller than those of the single layered solenoids, and after passing through the solenoid end they are larger than those of the single layered solenoids. In case of forces, inside of solenoids, the magnetic forces of multi-layerd solenoids were smaller than those of the single layered solenoids and became larger after passing some point outside of solenoids.
The magnetic fields and the magnetic forces of multi-layered solenoids derived in this study yield more accurate results.