Figure 1.

Schematic diagram of the structure of the magnetic levitation vibration energy harvester"

Figure 2.

Magnetic induction intensity of composite suspension magnet structure (partial section)"

Figure 3.

Time history of vertical vibration acceleration of vehicle axle box"

Figure 4.

Frequency spectrum of vertical vibration acceleration signal of vehicle axle box"

Figure 5.

Magnetic force calculation model between two cylindrical permanent magnets"

Figure 6.

Mesh division of the magnetic force model between two cylindrical permanent magnets"

Figure 7.

Magnetic flux density model on the surface of the magnet (three-dimensional image)"

Figure 8.

Magnetic flux density model on the magnet surface (two-dimensional cross-sectional view)"

Figure 9.

Electromagnetic force variation curve"

Figure 10.

Curve of stiffness change of magnetic spring"

Figure 11.

Lumped mechanical system model of vibration energy harvester"

Figure 12.

Two-dimensional axisymmetric model of vibration energy harvester"

Figure 13.

Half section of magnetic induction intensity/line of magnetic induction in the middle position"

Figure 14.

Equivalent circuit diagram of energy capture device"

Table 1.

Main parameters of magnetic levitation vibration energy harvester"

Figure 15.

Frequency response characteristics of magnetic levitation vibration energy harvester"

Figure 16.

Novel composite suspension magnet structure (half section)"

Figure 17.

The magnetic induction indensity of inner ring radiating magnetized magnet (partial section)"

Figure 18.

The magnetic induction intensity of the new composite suspension magnet structure (partial section)"

Figure 19.

Output current of energy capture device"

Figure 20.

Output power of energy capture device"

Figure 21.

The output power of the energy capture device under equivalent simple harmonic vibration excitation (34 Hz)"

Figure 22.

The output power of the energy capture device under equivalent simple harmonic vibration excitation (58.2 Hz)"