{ "design" : { "airGap" : 8, "coreLossAtReference" : 60, "coreLossResistance" : 300, "currentAngleDegrees" : 90, "currentRMS" : 0, "dAxisInductance" : 0.35, "dcBusVoltage" : 650, "fieldPhysics" : { "nonlinearSteel" : true, "rotorConductivityMSm" : 35, "steelCurve" : { "points" : [ { "b" : 0, "h" : 0 }, { "b" : 0.049000501783472435, "h" : 19.96533 }, { "b" : 0.09800075162699742, "h" : 29.906288 }, { "b" : 0.14700091480089258, "h" : 36.398771 }, { "b" : 0.19600103978345118, "h" : 41.371669 }, { "b" : 0.24500114580825738, "h" : 45.590262 }, { "b" : 0.2940012421821915, "h" : 49.424859 }, { "b" : 0.34300133410320705, "h" : 53.08228 }, { "b" : 0.3920014248420539, "h" : 56.692664 }, { "b" : 0.4410015166949346, "h" : 60.347374 }, { "b" : 0.4900016114519789, "h" : 64.117637 }, { "b" : 0.5390017106538743, "h" : 68.064755 }, { "b" : 0.5880018157493471, "h" : 72.246371 }, { "b" : 0.6370019282061747, "h" : 76.720886 }, { "b" : 0.6860020496032713, "h" : 81.551123 }, { "b" : 0.7350021817219701, "h" : 86.807959 }, { "b" : 0.7840023266510283, "h" : 92.574503 }, { "b" : 0.8330024869229463, "h" : 98.95152 }, { "b" : 0.8820026657053797, "h" : 106.065047 }, { "b" : 0.9310028670872492, "h" : 114.077777 }, { "b" : 0.9800030965274117, "h" : 123.206911 }, { "b" : 1.0290033615892136, "h" : 133.753385 }, { "b" : 1.0780036731938114, "h" : 146.151738 }, { "b" : 1.1270040478458254, "h" : 161.058668 }, { "b" : 1.1760045117451086, "h" : 179.516634 }, { "b" : 1.225005108680662, "h" : 203.267945 }, { "b" : 1.274005915738297, "h" : 235.379748 }, { "b" : 1.3230070754936674, "h" : 281.524948 }, { "b" : 1.3720088630212834, "h" : 352.648412 }, { "b" : 1.421011823099424, "h" : 470.426179 }, { "b" : 1.4700170262142749, "h" : 677.451541 }, { "b" : 1.5190264162209626, "h" : 1051.068036 }, { "b" : 1.5680428079739632, "h" : 1703.275165 }, { "b" : 1.617068524870319, "h" : 2726.517959 }, { "b" : 1.6661039988069892, "h" : 4137.981052 }, { "b" : 1.715146589721706, "h" : 5832.619704 }, { "b" : 1.7641995427295127, "h" : 7939.55294 }, { "b" : 1.8132655348085267, "h" : 10565.294335 }, { "b" : 1.8623479354821422, "h" : 13843.912965 }, { "b" : 1.9114516444000769, "h" : 17970.359698 }, { "b" : 1.9605887037116647, "h" : 23423.776432 }, { "b" : 2.0098101369730346, "h" : 32234.32596 }, { "b" : 2.0592909879635304, "h" : 51366.778967 }, { "b" : 2.1091256730543932, "h" : 84577.843501 }, { "b" : 2.1590451455912882, "h" : 121162.493322 }, { "b" : 2.2090244508817936, "h" : 160127.812767 }, { "b" : 2.259088633210169, "h" : 202470.282245 } ] }, "transient" : { "currentRampTime" : 0.005, "duration" : 0.04, "savedFrames" : 24, "timeStep" : 0.0002 } }, "gearlessPulleySettings" : { "alignmentTiltXRad" : 0, "alignmentTiltYRad" : 0, "alignmentXMM" : 0, "alignmentYMM" : 0, "bearingAMM" : 1890, "bearingBMM" : 5090, "bearingStiffnessNPerMM" : 2000000, "beltForceX_N" : -3645000, "beltForceY_N" : 0, "hubAMM" : 2598.5, "hubBMM" : 4381.5, "magneticCenterMM" : 900, "pulleyBodyMomentShareFraction" : 0.4, "pulleyMassKG" : 50000, "rotorMassKG" : 20000, "shaftDiameterMM" : 860, "shaftLengthMM" : 6197, "statorRotationStiffnessNMM" : 1000000000000, "statorStiffnessNPerMM" : 1000000, "youngModulusMPa" : 210000 }, "kind" : "woundField", "lineVoltageRMS" : 1150, "magnetArcFraction" : 0.8, "magnetRemanence" : 1.2, "magnetThickness" : 4, "magnetizingReactance" : 25, "materialSettings" : { "inverter" : { "enabled" : false, "forwardDrop" : 0, "onResistance" : 0.02, "referenceCurrent" : 20, "referenceVoltage" : 400, "source" : "User inputs; no certified device data", "switchingEnergy" : 0.001, "switchingFrequency" : 10000 }, "magnet" : { "kneeFieldAtReference" : 0, "kneeTemperatureCoefficient" : -0.005, "recoilPermeability" : 1.05, "referenceTemperature" : 20, "remanenceCoefficient" : -0.0012, "source" : "User inputs; coefficients are illustrative until replaced", "temperature" : 20, "temperatureCorrection" : false }, "magnetDensity" : 7500, "steelDensity" : 7850, "steelSource" : "FEMM M-45 Steel, 47 B\/H pairs, 0.98 in-plane fill; piecewise-linear H(B). https:\/\/github.com\/cenit\/FEMM\/blob\/master\/bin\/matlib.dat. Not measured motor-specific data.", "useFieldIronLoss" : false }, "mechanicalLossAtReference" : 20, "meshDensity" : "draft", "name" : "Escondida thesis-based gearless drive example", "phaseResistanceAt20C" : 0.12, "poleCount" : 16, "qAxisInductance" : 0.35, "rotorAngleDegrees" : 0, "rotorBarCount" : 36, "rotorBarDepth" : 10, "rotorLeakageReactance" : 1, "rotorResistanceReferred" : 0.5, "shaftDiameter" : 860, "slotCount" : 144, "slotDepth" : 100, "slotOpeningFraction" : 0.4, "speedRPM" : 0, "stackLength" : 1400, "statorBoreDiameter" : 2500, "statorLeakageReactance" : 1, "statorOuterDiameter" : 3000, "steelRelativePermeability" : 4689, "supplyFrequency" : 8.33, "turnsPerCoil" : 1, "windingDefinition" : { "calculateResistance" : false, "calculateWindingFactor" : false, "coilSpan" : 9, "endInductanceMH" : 0.03, "endOverhangMM" : 10, "manualCoils" : [ ], "mode" : "automaticCoils", "parallelPaths" : 1, "strands" : 10, "wireDiameterMM" : 0.8 }, "windingFactor" : 0.93, "windingTemperature" : 80, "woundFieldSettings" : { "eccentricityX" : 0, "eccentricityY" : 0, "fieldCurrent" : 165.9, "fieldTurnsPerPole" : 45, "notes" : "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.", "poleNeckArcDegrees" : 8, "poleRootDiameter" : 2300, "poleShoeArcDegrees" : 14, "poleShoeThickness" : 25, "rotorInnerDiameter" : 2100 } }, "formatVersion" : 1 }