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quickref.md

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MAS Quick Reference

Minimal Inductor

{
  "inputs": {
    "designRequirements": {
      "magnetizingInductance": {"nominal": 100e-6},
      "turnsRatios": [],
      "topology": "Buck Converter"
    },
    "operatingPoints": [{
      "conditions": {"ambientTemperature": 25},
      "excitationsPerWinding": [{
        "frequency": 100000,
        "current": {"processed": {"label": "Triangular", "peakToPeak": 1.0, "offset": 5.0, "dutyCycle": 0.5}},
        "voltage": {"processed": {"label": "Rectangular", "peakToPeak": 12.0, "offset": 0, "dutyCycle": 0.5}}
      }]
    }]
  },
  "magnetic": {
    "core": {"functionalDescription": {"type": "two-piece set", "material": "N97", "shape": "E 42/21/15", "gapping": [{"type": "subtractive", "length": 0.001}], "numberStacks": 1}},
    "coil": {"bobbin": "E 42/21/15", "functionalDescription": [{"name": "Primary", "numberTurns": 20, "numberParallels": 1, "isolationSide": "primary", "wire": "Round 1.0 - Grade 1"}]}
  },
  "outputs": []
}

Minimal Transformer (2 windings)

{
  "inputs": {
    "designRequirements": {
      "magnetizingInductance": {"nominal": 500e-6},
      "turnsRatios": [{"nominal": 0.1}],
      "topology": "Flyback Converter"
    },
    "operatingPoints": [{
      "conditions": {"ambientTemperature": 25},
      "excitationsPerWinding": [
        {"name": "Primary", "frequency": 100000, "current": {"processed": {"label": "Triangular", "peakToPeak": 1.0, "offset": 0.5, "dutyCycle": 0.4}}, "voltage": {"processed": {"label": "Rectangular", "peakToPeak": 325, "offset": 0, "dutyCycle": 0.4}}},
        {"name": "Secondary", "frequency": 100000, "current": {"processed": {"label": "Triangular", "peakToPeak": 10.0, "offset": 5.0, "dutyCycle": 0.6}}, "voltage": {"processed": {"label": "Rectangular", "peakToPeak": 24, "offset": 0, "dutyCycle": 0.6}}}
      ]
    }]
  },
  "magnetic": {
    "core": {"functionalDescription": {"type": "two-piece set", "material": "N97", "shape": "ETD 34/17/11", "gapping": [{"type": "subtractive", "length": 0.0005}], "numberStacks": 1}},
    "coil": {"bobbin": "ETD 34/17/11", "functionalDescription": [
      {"name": "Primary", "numberTurns": 50, "numberParallels": 1, "wire": "Litz 20x0.1 - Grade 1", "isolationSide": "primary"},
      {"name": "Secondary", "numberTurns": 5, "numberParallels": 2, "wire": "Litz 100x0.1 - Grade 1", "isolationSide": "secondary"}
    ]}
  },
  "outputs": []
}

Core Shapes (exact names required)

Family Examples
E "E 19/8/5", "E 42/21/15", "E 55/28/21", "E 65/32/27"
ETD "ETD 29/16/10", "ETD 34/17/11", "ETD 49/25/16"
EFD "EFD 15/8/5", "EFD 20/10/7", "EFD 25/13/9"
PQ "PQ 20/16", "PQ 26/25", "PQ 35/35", "PQ 40/40"
RM "RM 6", "RM 8", "RM 10", "RM 12", "RM 14"
Toroid "T 20/10/7", "T 40/24/16", "T 58/41/18"
EP "EP 7", "EP 10", "EP 13", "EP 17"
ER "ER 9.5/5", "ER 14.5/6", "ER 25/10.5"

Core Materials

Manufacturer Low Loss HF General High Flux
TDK/EPCOS "N49", "N97" "N87", "N95" -
Ferroxcube "3C97", "3F46" "3C90", "3C95" -
Magnetics - - "MPP", "High Flux", "XFlux"
Micrometals - - "Mix 26", "Mix 52"

Gapping

// Ungapped (toroid, powder core)
"gapping": []

// Single gap in center leg (E core)
"gapping": [
  {"type": "subtractive", "length": 0.001},
  {"type": "residual", "length": 0.00001},
  {"type": "residual", "length": 0.00001}
]

// Spacer gap
"gapping": [{"type": "additive", "length": 0.002}]

Wire Types

Type Format Example
Round Round <diameter_mm> - Grade <1-3> "Round 1.0 - Grade 1"
Litz Litz <strands>x<strand_dia_mm> - Grade <1-3> "Litz 40x0.1 - Grade 1"
Rectangular Rectangular <width>x<height> - Grade <1-3> "Rectangular 2.0x0.5 - Grade 1"
Foil Foil <thickness_mm> "Foil 0.1"

Waveforms

Label Use Case
Triangular Inductor current, magnetizing current
Rectangular Inductor voltage, transformer primary
Sinusoidal LLC, resonant, AC applications
Flyback Primary Flyback primary current
Flyback Secondary Flyback secondary current

Processed Waveform

{
  "processed": {
    "label": "Triangular",
    "peakToPeak": 2.0,      // Peak-to-peak amplitude (A or V)
    "offset": 10.0,         // DC offset (A or V)
    "dutyCycle": 0.5        // 0.0 to 1.0
  }
}

Topologies

  • Buck Converter, Boost Converter, Inverting Buck-Boost Converter
  • Flyback Converter, Active Clamp Forward Converter, Single Switch Forward Converter, Two Switch Forward Converter
  • Push-Pull Converter, Half-Bridge Converter, Full-Bridge Converter
  • Isolated Buck Converter, Isolated Buck-Boost Converter
  • Current Transformer

Units (SI)

Quantity Unit Example
Inductance H 100e-6 = 100 µH
Frequency Hz 100000 = 100 kHz
Length/Gap m 0.001 = 1 mm
Temperature °C 40 = 40°C
Current A 10.0 = 10 A
Voltage V 400 = 400 V

Dimension With Tolerance

// Just nominal
{"nominal": 100e-6}

// With limits
{"nominal": 100e-6, "minimum": 90e-6, "maximum": 110e-6}

// Just limits
{"minimum": 90e-6, "maximum": 110e-6}