Magnetic gears offer several advantages compared to mechanical gears

in terms of low noise

reduced maintenance

improved reliability and inherent overload protection

whilst having a high efficiency.Based on the discussion of the principle of the traditional radial magnetic gear

an overview of the existing topology of the high performance magnetic gear is described

the transmission characteristics of each topologies are introduced

and the advantages and disadvantages compared to the traditional radial magnetic gear are presented.Finally the potential application in areas such as wind power systems

air transport and industrial automation is described.