This paper has presented a module-cascaded system for multi-coil direct-drive permanent magnet wind generator system with high voltage output, eliminating the grid-side step-up transformer.

Radial lead coil, single or multi-layer winding on ferrite core, coating by epoxy resin. Products can be taped or packed in viny bangs.

In the system of the Multi-Stage Synchronous Induction Coilgun, the axial length of the drive coil directly affects the velocity of projectile.