Abstract: In this paper, a radial electromagnetic gear with less pole difference is
proposed. Operating principle of the radial electromagnetic gear is
introduced and equations of the geometrics for the radial electromagnetic
gear are deduced. The equations of the magnetic induction intensity for the
stator windings are given and the electromagnetic field distributions of the
stator windings are investigated. The equations of the torques between the
planetary rotor and stator windings are developed. The available parameters
of the radial electromagnetic gear with less pole difference are presented.
Changes of the maximum torque between the planetary rotor and stator
windings along with the available parameters are researched. The result
shows that the pole-pair number, the radial tooth thickness, and the center
distance of the gear have obvious influence on the maximum torque. In order
to obtain large load carrying ability of the radial electromagnetic gear,
the maximum torque must be improved. So a large radial tooth thickness, a
proper pole-pair number, a small center distance, a large winding's circle
number, and large current should be chosen.
Keywords: Eelectromagnetic gear, less pole difference, torque, magnetic induction intensity, parameters
