Design and Analysis of Magnetic Gear-axial Flux Generator for Wave Power Generation Based on Halbach Magnetic Circuit

To solve the problems of large volume and low power density of wave generator motors, two topologies of magnetic gear-axial flux generator based on Halbach magnetic circuit are proposed in this paper. The magnetic circuit of the magnetic gear and the motor part are coupled with each other, which improves the power density of the whole system. The permanent magnets in the motor section provide additional flux to the magnetic gear, which increases the instantaneous torque of the magnetic gear. The flux density, torque and back EMF of the two structures are compared and analyzed to determine the optimal generator structure.