Considering the significant threat posed by the large interturn short-circuit (ITSC) current to the reliability of high-power high-speed permanent magnet generator (HSPMG)

this paper proposes a toroidal windings-based anti-ITSC-fault HSPMG scheme. The structure of circling around the stator yoke greatly enhances the inductance of the shorted coil

effectively suppressing the ITSC current. The analytical model of ITSC current is first established. Subsequently

electromagnetic simulations are performed to characterize the electromagnetic field distribution

ITSC current

and shorted coil inductance under ITSC conditions. The interaction mechanism among the three properties is theoretically analyzed to demonstrate both the effectiveness and limitations of this scheme. Results indicate that the magnetic field is distorted and saturated

the shorted coil inductance varies considerably with rotor position

and the waveform of ITSC current exhibits severe distortion from a sinusoidal shape. Furthermore

the influences of fault coil positions within slots

the number of shorted turns and strands

operating speed

and load rates on the ITSC current are investigated. To further enhance the anti-ITSC-fault capabilities

the design principles of structural parameters are explored. It is revealed that utilizing high-permeability Fe-Co-V V soft magnetic alloy as stator core material and increasing stator yoke thickness can effectively reduce levels of ITSC current. Finally

a prototype is developed to validate theoretical results.