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Electric Machine Packaging Techniques:


Best Electric Machine (BEM) describes "packaging techniques" as the trade space between the mechanical (and material) performance of the electric machine entity, such as size, weight, etc, and the difference in cost for achieving the mechanical performance. Virtually all of today's packaging techniques have closely followed the century of evolution of electric machines, material science, structural science, etc. with the same packaging techniques available to all electric machines.[1]  As a result, packaging techniques provide no immediate innovative value-added to any specific electric machine with perhaps the exception of re-incorporating packaging techniques that have been recently enabled by advancements in material science or manufacturing methods, such as MotorPrinter. For instance, the first concept electric machine built by Faraday himself had an axial-flux (or disk shape) footprint with segmented non-overlapping windings, which some specialty electric machine manufacturers seemingly advertize as new technology for their electric machine system. Packaging Techniques include at least: 1) frame and bearing mechanical assembly design that already contribute considerable EM real-estate, such as incorporating high strength materials or structural methods to improve strength to weight ratio of the frame, or to support complex magnetic paths; 2) winding arrangement and packing techniques, such as overlapping or non-overlapping windings or the tightness of windings; 3) magnetic performance of core materials; 4) number and depth of air-gaps in the magnetic path; 5) manufacturability, including manual or automatic; 6) reliability; 7) sustainability; and 8) etc., all of which show significant trade-offs between cost and performance.


[1] Packaging Techniques are "mechanical" enhancements that improve electric machine performance, such as size weight, efficiency, etc. In the context of packaging techniques, "material science" specifically refers to the mechanical performance of the material, such as the thickness of the laminations, the manufacturability of the material, or the mechanical strength of the material, and "structural science" refers to the structural composition of the materials, the structural layout, etc.

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Note: The Radial Flux prototyping of the Advanced Brushless Wound-Rotor Synchronous Doubly-Fed Electric Motor Or Generator System is shown as our Icon, which predates the axial-flux SS-EMS Technology.


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