{
  "source_sector_deg": 90,
  "full_sector_multiplier": 4,
  "depth_mm": 100,
  "pole_pairs": 2,
  "stator_frequency_Hz": 50,
  "phasors": "peak amplitudes, .5 Re(sum U I*)",
  "voltage_phase_rms_V": 230,
  "Rpack20_ohm": 0.8,
  "Rend20_ohm": 0.2,
  "rotor_rings": {
    "bars_full": 32,
    "origin": "Explicit illustrative end-ring geometry chosen for this course model; not a measured motor passport.",
    "section_m2": 5e-05,
    "radius_m": 0.036,
    "rings": 2,
    "conductivity_S_m": 34450000.0
  },
  "ring_to_bar_ratio": 0.6357402330272799,
  "effective_bar_sigma_MS_m": 21.06080128398081,
  "source_frequency_experiment": "Mechanically stationary rotor, low applied field frequency. This is not the moving machine stator frequency.",
  "original_document": "InductionMotorExample-source.txt / original PDF, David Meeker26Sep2002: phase voltage/current RMS. This course uses explicitly chosen230V; the original example220V is not relabelled.",
  "default_Lexternal_H": 0.0,
  "default_Lexternal_reason": "End-winding leakage geometry is unknown; the baseline explicitly neglects this external inductance. A separate real field/circuit comparison adds an illustrative positive1mH at50Hz; no manufacturer value is inferred.",
  "external_L_comparison_H": 0.001
}