{
  "schemaVersion": 1,
  "source": {
    "author": "Søren Bøgh Andersen",
    "year": 2012,
    "title": "Design and Optimization of Gearless Drives using Multi-Physics Approach",
    "record": "https://orbit.dtu.dk/en/publications/design-and-optimization-of-gearless-drives-using-multi-physics-ap/",
    "PDF": "https://backend.orbit.dtu.dk/ws/files/108702057/Design_and_Optimization_of_Gearless.pdf"
  },
  "published": {
    "section2_2": {
      "poles": 60,
      "fieldCurrentDC_A": 490,
      "fieldTurnsPerPole": 53,
      "fieldTurnDerivation": "18+18+17 turns; three parallel copper rows. Table 3.4 active copper length 7950 m / (60 × 2 × 1.25 m) = 53."
    },
    "section2_4": {
      "statorCurrentRMS_A": 2480,
      "statorSteel": "M400-50A",
      "rotorSteel": "St.42"
    },
    "section3_2Table3_1": {
      "slots": 504,
      "polePairs": 30,
      "phases": 3,
      "layers": 2,
      "coilSpanSlots": 10,
      "baseWindingSlots": 84,
      "baseRepeats": 6,
      "nativePhaseMapping": {
        "A": "U",
        "B": "W",
        "C": "V"
      },
      "nativeLayerConvention": "Printed bottom-side slot maps to native returnSlot, printed top side +10 to native startSlot; invert printed polarity at native start."
    },
    "table5_1Figure5_4": {
      "units": "m",
      "stator": {
        "R1": 5.4,
        "R2": 5.415,
        "R3": 5.41,
        "R4": 5.462,
        "R5": 5.47,
        "R6": 5.522,
        "R7": 5.53,
        "R8": 5.582,
        "R9": 5.585,
        "R10": 5.659,
        "R11": 5.7,
        "R12": 5.75,
        "R13": 0.012,
        "R14": 0.01,
        "W1": 0.0483,
        "W2": 0.0197,
        "W3": 0.006
      },
      "rotor": {
        "R1": 4.955,
        "R2": 5.135,
        "R3": 5.328,
        "R4": 5.384,
        "R5": 1.87,
        "R6": 5.145,
        "R7": 5.196,
        "R8": 5.207,
        "R9": 5.258,
        "R10": 5.269,
        "R11": 5.32,
        "R12": 5.372,
        "W1": 0.2584,
        "W2": 0.2679,
        "W3": 0.214,
        "W4": 0.2605,
        "W5": 0.162,
        "W6": 0.1665,
        "W7": 0.2553
      }
    },
    "table3_4": {
      "activeStatorLengthMM": 1250,
      "rotorActiveCopperLengthM": 7950
    },
    "table3_2_maximumTorque": {
      "equivalentSpringPerPole_kN_per_m": -8518.47,
      "wholeRotorAttractionDerivative_kN_per_mm": 255.5541
    },
    "table3_3_maximumTorque": {
      "radialForcePerPole_N": 259900,
      "torque_Nm": 13600000,
      "ABB_radialForcePerPole_N": 249000,
      "ABB_torque_Nm": 13300000
    }
  },
  "nativeMapping": {
    "statorBoreDiameterMM": "2 × stator R1 × 1000 = 10800",
    "statorOuterDiameterMM": "2 × stator R12 × 1000 = 11500",
    "airGapMM": "(stator R1 − rotor R4) × 1000 = 16",
    "slotDepthMM": "(stator R9 − stator R1) × 1000 = 185",
    "slotOpeningFraction": "stator W2 / bore slot pitch",
    "rotorInnerDiameterMM": "2 × rotor R1 × 1000 = 9910",
    "poleRootDiameterMM": "2 × rotor R2 × 1000 = 10270",
    "poleShoeThicknessMM": "(rotor R4 − rotor R3) × 1000 = 56",
    "poleShoeArcDegrees": "2 atan(rotor W4 / rotor R4), converted to degrees",
    "poleNeckArcDegrees": "2 atan(rotor W5 / rotor R2), converted to degrees"
  },
  "approximations": [
    "Uniform annular core replaces individual pole mounting/return path geometry.",
    "Constant-angle neck and circular shoe envelope replace tapered base and curved pole face.",
    "Open rectangular slots omit wedges, cooling holes and insulation.",
    "One uniform 1250 mm stack for rotor and stator.",
    "One stator turn and parallel path; source bar current treated as conductor current if energized.",
    "Same illustrative FEMM M-45 B-H law for both steels; source-specific separate curves not used.",
    "Isolated 100 mm central steel placeholder for the native template; no physical motor shaft is asserted.",
    "Unused supplied equivalent-circuit defaults have no role in the static solve."
  ],
  "defaultOperatingPoint": {
    "fieldCurrentDC_A": 490,
    "statorCurrentRMS_A": 0,
    "eccentricityMM": 0,
    "purpose": "Field-only static study, not the published maximum-torque condition."
  },
  "independentThesisReproduction": false
}