Analysis of Magnetic Field Distribution in Disc Magnetic Drivers

Magnetic field distributions in disc magnetic drivers are analyzed by theory of the equivalent magnet charge in present work. An analytical model for magnetic induction is established based on assumption of the equivalent magnet charge. Effect of both dimensions and relative angle of magnets on the magnetic induction is analyzed by the established model to obtain the best ratio between the magnetic induction and magnet volume. The calculation shows that the components of magnetic flux density distribute periodically, and the bigger size isolation disc is more influenced in the magnet field.