A triangular levitating rotor and the experimental setup. The black diamagnetic plates (pyrolitic graphite) vertically stabilize the rotor.
The two coils used for the emf experiments: (a) circular coils; (b) segmented arc coils.
Diagrams for developing the emf equations for various planar coils. The top diagram shows a general planar shape and the middle and bottom ones show specific cases for the experiments.
Effect of changing angular coil width. When a magnet’s path inside and outside a set of coils is equal, the generated wave form is symmetric (center graph).
Around a magnet there is a surface where the component for vertical flux density is zero (dashed line).
The curves show the location where for magnets with different aspect ratios as well as the linear approximations for each curve.
The curve for the change in slope as a function of magnet aspect ratio and the corresponding linear regression.
Wave forms generated from varying coil distance from a rotation center but keeping a constant angular width. The rotor magnet positions followed the coils. Further positions produce higher emf but wave forms have more undesired ripples.
The corresponding harmonics from the wave forms of Fig. 8.
Geometry used to find the radial distance from a rotation axis for placing rotor magnets. The figure shows the arc method (a) and the straight line method (b) for straight end arc coils.
Geometry used to find the radial distance from a rotation axis for placing rotor magnets with circular coils.
Simulated wave form using a design predicted by the optimization theory with no adjustments. All the dimensions are nondimensionalized by magnet thickness (1.6 mm).
Simulated wave form using a design optimized manually by moving rotor magnet locations closer to the rotor’s center. All the dimensions are nondimensionalized by magnet thickness (1.6 mm).
Comparison between simulated and actual wave forms for the first emf experiment using segmental arc coils.
Comparison between simulated and actual wave forms for the second emf experiment using circular coils with manual optimization.
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