Fig. 2: Permanent magnet synchronous motor (PMSM) components and assembly.
From: Magnetic localization and manipulation of locking synchronous motors
a Fabrication of the PMSM. (i) Schematic of two stacked planar coils and a cross section with annotated dimensions. (ii) Planar coils are rolled into cylindrical stators with perpendicular angular orientation (θ). A PVDF tube maintains the shape and connects to a PTFE tube, guiding power leads. (iii) An injected low-friction resin seals the proximal opening of the stator lumen. (iv) The stator lumen is filled with a solid cylinder of Cerrolow 117 alloy. (v) The cylinder is molten, followed by inserting a diametrically magnetized rotor with a ferrofluid bearing. (vi) The liquid alloy is pushed up by inserting the magnet, and cooled to solidify. (vii) The motor is sealed with a resin dip coating. b Photographs of the stator structure and lumen. c Front and back views showing coil edge alignment when wrapped. d Top-view and isometric photographs of the stator lumen with the rotor and fusible alloy, and finished PMSM. Scale bar: 2 mm.
