Helical Annular Motor Coil Layout Without Turnbacks

The patent extracts and eliminates the coil end portion that causes turnback from the helically-wound sheet coil structure. By removing this problematic component, the coil maintains its helical winding without turnback, thereby eliminating the non-uniform proximity effect and electrostatic field issues while preserving the electromagnetic force generation capability through the simplified open-ended helical structure

Instead of turning the coil back at the end portion to close the loop (conventional approach), the patent inverts the approach by leaving the coil ends open and using alternative connection methods. This inversion eliminates the turnback structure that causes energy loss while maintaining the electrical circuit continuity through different means, thereby resolving the energy efficiency problem

The patent applies curved/helical winding geometry to the coil structure, where the wire is wound in a continuous helical pattern around the core. This curved configuration optimizes space utilization by packing the coil turns efficiently in a compact volume while maintaining continuous winding for ease of manufacture, eliminating the need for turnback sections that would increase motor size

The helically-wound sheet coil structure allows for nested arrangement of multiple turns and layers within a compact volume. The continuous helical winding enables inner turns to be nested within outer turns, maximizing space utilization and reducing the overall motor size while maintaining the continuous winding manufacturing process