{ "assumed_pulley_body_moment_share_fraction" : 0.40000000000000002, "assumptions" : "Source: Simón Ignacio Galasso Hofer, 2018, hdl.handle.net\/11673\/47441. Table 3.1: 2500 mm bore, 2484 mm rotor OD, 2100 mm rotor ID, 8 mm gap, 144 slots, 16 poles, 45 field turns, 14° pole shoe, 1° slot width, 9-slot coil pitch. Appendix A: 100 mm slot depth, 5096 kW, 1150 V Y, 2677 A, 62.5 rpm, 474 A rated field current; starting field = 0.35 × 474 = 165.9 A. Assumptions: 3000 mm stator OD, 1400 mm active stack (Fig. B.6 gives only ~1630 mm overall length), 2300 mm pole-root diameter, 25 mm shoe thickness, 8° neck, one stator turn and one parallel path. Appendix A instead lists pitch 24 and width 1.5°; Chapter 3's FEM inputs are used. Steel uses FEMM's M-45 table with 0.98 in-plane fill and piecewise-linear H(B), not measured motor-specific data or FEMM's spline. Stator current defaults to zero for field-only starting. This remains an exploratory static model; missing dimensions and the coupled shaft\/startup model prevent a full thesis reproduction. Pulley example: report Appendix D supplies 6197 mm overall shaft length, bearing stations 1890\/5090 mm and locking-device bands 2440-2757\/4223-4540 mm; their midpoints define hub load stations 2598.5\/4381.5 mm. Report Table 1 supplies 3645 kN fatigue belt resultant. Illustrative assumptions: uniform 860 mm shaft, E=210 GPa, magnetic center\/rigid attachment at 900 mm, equal hub load split, rotor mass 20 t, pulley mass 50 t, bearing stiffness 2000 kN\/mm, stator translation 1000 kN\/mm and rotation 1e12 N.mm\/rad. Shaft self-weight is included separately. Field-only radial force map, rigid rotor, independent axial slices and Euler-Bernoulli shaft; no shell\/locking-device compliance, thermal expansion, stress, fatigue or startup dynamics. This combines different research\/project inputs for sensitivity, not an as-built replica or design acceptance. Published context: Galasso Hofer's 2018 thesis identifies Minera Escondida, Chile, and OGP1 overland conveyors CT-236\/CT-237\/CT-238 (printed pp.1-2). This attribution applies to the motor template; the coupled sensitivity example combines anonymized structural inputs and assumed masses\/supports. Pulley-body allowance: 40% of total bending moment is assumed to pass through the pulley body between the two hub centers, with 60% through the shaft. This is a user-selected sensitivity assumption, not a published or calculated body stiffness. The hub-to-hub equivalent EI is EI_shaft\/(1-0.40); outside that span the shaft EI is unchanged. Full belt, gravity and magnetic loads remain in equilibrium. Shell, end-disk and locking-device stiffnesses are not resolved explicitly. Older inputs without this field retain zero body moment share.", "centered_stiffness_refinement" : { "draft_to_standard_change_fraction" : 0.0074383289226751526, "step_change_fraction" : 0.001132148413317879 }, "design_acceptance" : false, "electromagnetic_mesh" : "draft", "force_map" : "radial x-direction FEM response, odd isotropic continuation, piecewise-linear; no extrapolation", "independent_motor_validation" : false, "maximum_transverse_force_fraction" : 1.1176548316684837e-13, "mechanics" : "Euler-Bernoulli shaft + prescribed body moment share between hubs + bearing translation springs + stator translation\/rotation springs; rigid rotor", "moment_sharing_extent_mm" : [ 2598.5, 4381.5 ], "moment_sharing_method" : "Between hub centers EI_total=EI_shaft\/(1-f); M_body=f*M_total, M_shaft=(1-f)*M_total. Full applied forces remain unchanged. Outside hubs body share is zero.", "pulley_body_stiffness_explicitly_calculated" : false, "reused_electromagnetic_records" : true, "stator_stiffness_sensitivity" : [ { "minimum_gap_mm" : 6.6834034644070739, "stable" : true, "stator_stiffness_N_per_mm" : 500000 }, { "minimum_gap_mm" : 6.8609370074656537, "stable" : true, "stator_stiffness_N_per_mm" : 1000000 }, { "minimum_gap_mm" : 6.9701934110511363, "stable" : true, "stator_stiffness_N_per_mm" : 5000000 } ], "stiffness_definition" : "signed force derivative at fixed currents, N\/mm", "stiffness_sweep" : [ { "eccentricity_x_mm" : 0, "field_current_A" : 0, "force_N" : [ 0, 0 ], "jacobian_N_per_mm" : [ [ 0, 0 ], [ 0, 0 ] ], "maximum_residual" : 0, "mesh" : "draft", "step_mm" : 0.050000000000000003 }, { "eccentricity_x_mm" : 3, "field_current_A" : 0, "force_N" : [ 0, 0 ], "jacobian_N_per_mm" : [ [ 0, 0 ], [ 0, 0 ] ], "maximum_residual" : 0, "mesh" : "draft", "step_mm" : 0.050000000000000003 }, { "eccentricity_x_mm" : 0, "field_current_A" : 100, "force_N" : [ -3.3440983315813355e-09, 4.08601630308425e-09 ], "jacobian_N_per_mm" : [ [ 81130.86018300266, -2.4232349460362457e-09 ], [ 2.173528024229654e-10, 81130.860183007724 ] ], "maximum_residual" : 1.2663318575740452e-09, "mesh" : "draft", "step_mm" : 0.050000000000000003 }, { "eccentricity_x_mm" : 3, "field_current_A" : 100, "force_N" : [ 268733.41260910948, 4.6455506108600275e-09 ], "jacobian_N_per_mm" : [ [ 105963.74599064351, -1.57160684466362e-08 ], [ 4.6448977997215479e-09, 89535.609183139051 ] ], "maximum_residual" : 1.949585765377748e-07, "mesh" : "draft", "step_mm" : 0.050000000000000003 }, { "eccentricity_x_mm" : 0, "field_current_A" : 165.90000000000001, "force_N" : [ -4.8977426558849402e-09, 6.1301204112851337e-09 ], "jacobian_N_per_mm" : [ [ 113865.4129132969, 1.34718902700115e-09 ], [ -1.418731798707995e-10, 113865.41291330759 ] ], "maximum_residual" : 1.0275785540718603e-07, "mesh" : "draft", "step_mm" : 0.050000000000000003 }, { "eccentricity_x_mm" : 3, "field_current_A" : 165.90000000000001, "force_N" : [ 326873.32417631062, 7.7562480882420459e-09 ], "jacobian_N_per_mm" : [ [ 101894.83061543724, -1.4551915228366852e-08 ], [ 2.5664803615654819e-10, 109060.31908144726 ] ], "maximum_residual" : 4.8318828221771229e-07, "mesh" : "draft", "step_mm" : 0.050000000000000003 }, { "eccentricity_x_mm" : 0, "field_current_A" : 474, "force_N" : [ -7.0479018177138641e-09, 1.1344931216683563e-08 ], "jacobian_N_per_mm" : [ [ 54230.738278450612, 7.0940586738288403e-09 ], [ -1.5054739677111684e-08, 54230.738278472054 ] ], "maximum_residual" : 2.7353229065335339e-07, "mesh" : "draft", "step_mm" : 0.050000000000000003 }, { "eccentricity_x_mm" : 3, "field_current_A" : 474, "force_N" : [ 164796.02355152866, 1.0626116875300795e-08 ], "jacobian_N_per_mm" : [ [ 55866.758516464324, -1.4551915228366852e-09 ], [ -2.1440804687244963e-08, 54941.372566880877 ] ], "maximum_residual" : 4.6913491344428894e-10, "mesh" : "draft", "step_mm" : 0.050000000000000003 } ], "thermal_expansion_included" : false }