{
  "date": "2026-10-11",
  "status": "illustrative_scenarios_not_selected_hardware",
  "source_reference": "research/motors/goldenmotor-hpm/reference.yaml",
  "assumptions": {
    "dc_voltage_V": 72,
    "dc_to_shaft_efficiency": 0.9,
    "include_auxiliaries": false,
    "cell_nominal_V": 3.2,
    "cell_charge_limit_V": 3.65,
    "cell_values_are_scenario_assumptions": true
  },
  "power_scenarios": [
    {
      "shaft_power_W": 5000,
      "input_dc_power_W": 5555.555555555556,
      "dc_current_A": 77.1604938271605,
      "combined_motor_inverter_loss_W": 555.5555555555557
    },
    {
      "shaft_power_W": 10000,
      "input_dc_power_W": 11111.111111111111,
      "dc_current_A": 154.320987654321,
      "combined_motor_inverter_loss_W": 1111.1111111111113
    },
    {
      "shaft_power_W": 20000,
      "input_dc_power_W": 22222.222222222223,
      "dc_current_A": 308.641975308642,
      "combined_motor_inverter_loss_W": 2222.2222222222226
    }
  ],
  "two_motor_20kW_scenario": {
    "shaft_power_each_W": 20000,
    "total_current_at_72V_A": 617.283950617284,
    "total_current_at_60V_A": 740.7407407407408
  },
  "20kW_efficiency_sensitivity": [
    {
      "eta": 0.88,
      "dc_current_A": 315.65656565656565,
      "loss_W": 2727.272727272728
    },
    {
      "eta": 0.9,
      "dc_current_A": 308.641975308642,
      "loss_W": 2222.2222222222226
    },
    {
      "eta": 0.94,
      "dc_current_A": 295.5082742316785,
      "loss_W": 1276.5957446808534
    }
  ],
  "20kW_3200rpm": {
    "torque_Nm": 59.68310365946075,
    "pole_pairs": 4,
    "electrical_rpm": 12800,
    "electrical_frequency_Hz": 213.33333333333334
  },
  "winding_star_examples": {
    "line_to_line_R_ohm": 0.0032,
    "resistance_measurement_temperature_unknown": true,
    "formula": "Pcu_W = 1.5 * R_line_line_ohm * I_phase_rms_A**2",
    "validity": "Balanced three-phase star, identical winding resistance; not DC/peak current",
    "points": [
      {
        "phase_rms_A": 200,
        "copper_loss_W": 192.00000000000003
      },
      {
        "phase_rms_A": 500,
        "copper_loss_W": 1200.0000000000002
      }
    ]
  },
  "battery_scenarios": [
    {
      "series_cells": 23,
      "nominal_V": 73.60000000000001,
      "charge_maximum_V": 83.95,
      "selected": false,
      "voltage_spikes_not_included": true
    },
    {
      "series_cells": 24,
      "nominal_V": 76.80000000000001,
      "charge_maximum_V": 87.6,
      "selected": false,
      "voltage_spikes_not_included": true
    }
  ],
  "formula_audit": {
    "rotor_surface_cm2": 76.19932981282044,
    "note": "Audit of ET-60421 message 1756429; not ECONA motor dimensions"
  }
}