{
  "node": {
    "id": "term:emi-filter",
    "type": "Term",
    "label": "EMI filter",
    "properties": {
      "id": "emi-filter",
      "name": "EMI filter",
      "aka": [
        "EMC filter",
        "line filter",
        "noise filter"
      ],
      "section": "topic-data",
      "definition": "A network of inductors and capacitors, typically common-mode chokes with X and Y capacitors, that stops high-frequency noise travelling along cables. Inverters, chargers and DC/DC converters need them to pass compatibility tests; on high-voltage lines the Y capacitors to chassis also store energy and pass touch current, which safety standards limit.",
      "related": [
        "electromagnetic-compatibility",
        "inverter",
        "dc-dc-converter",
        "onboard-charger",
        "insulation-resistance"
      ],
      "url": "https://lemonergy.com/learn/glossary/emi-filter/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:5254",
      "source": "term:emi-filter",
      "target": "topic:topic-data",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:5255",
      "source": "term:emi-filter",
      "target": "term:electromagnetic-compatibility",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5256",
      "source": "term:emi-filter",
      "target": "term:inverter",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5257",
      "source": "term:emi-filter",
      "target": "term:dc-dc-converter",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5258",
      "source": "term:emi-filter",
      "target": "term:onboard-charger",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5259",
      "source": "term:emi-filter",
      "target": "term:insulation-resistance",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-data",
      "type": "Topic",
      "label": "Data, communication and electronics",
      "properties": {
        "id": "topic-data",
        "name": "Data, communication and electronics",
        "lede": "The control units, chips, protocols and file formats through which a battery is measured, controlled and logged.",
        "context": "Separate quantities from encoding and transport.",
        "example": "2500 in a log might mean 25.00 °C, 2.5 V or raw counts. Units and scale must accompany the value.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-basics/",
        "lesson_label": "Open battery basics"
      }
    },
    {
      "id": "term:electromagnetic-compatibility",
      "type": "Term",
      "label": "Electromagnetic compatibility",
      "properties": {
        "id": "electromagnetic-compatibility",
        "name": "Electromagnetic compatibility",
        "aka": [
          "EMC",
          "electromagnetic interference",
          "EMI"
        ],
        "section": "topic-data",
        "definition": "The ability of electronics to work without disturbing other equipment or being disturbed by it. A BMS must keep its own emissions low and keep measuring cell voltages accurately next to an inverter switching hundreds of amperes; vehicles prove it under UN R10, with filtering, shielding and layout as the tools.",
        "related": [
          "un-r10",
          "emi-filter",
          "bms",
          "inverter",
          "wiring-harness",
          "iec-61000-6"
        ],
        "url": "https://lemonergy.com/learn/glossary/electromagnetic-compatibility/",
        "mentions": []
      }
    },
    {
      "id": "term:inverter",
      "type": "Term",
      "label": "Inverter",
      "properties": {
        "id": "inverter",
        "name": "Inverter",
        "aka": [
          "power conversion system",
          "PCS"
        ],
        "section": "topic-pack",
        "definition": "The power electronics that turn the battery’s DC into AC for a motor or the grid, and back again for charging. In stationary storage it is called the power conversion system and its rating in kW or MW sets the system’s power independently of the battery’s energy.",
        "related": [
          "pre-charge",
          "dc-dc-converter",
          "stationary-storage",
          "energy-management-system",
          "direct-current",
          "iec-62477-1"
        ],
        "url": "https://lemonergy.com/learn/glossary/inverter/",
        "mentions": []
      }
    },
    {
      "id": "term:dc-dc-converter",
      "type": "Term",
      "label": "DC/DC converter",
      "properties": {
        "id": "dc-dc-converter",
        "name": "DC/DC converter",
        "section": "topic-pack",
        "definition": "The power electronics that step the high-voltage pack down to 12 V or 48 V for the auxiliary systems, replacing the alternator of a combustion car. Boost converters also appear between an 800 V pack and a 400 V charger.",
        "related": [
          "auxiliary-battery",
          "inverter",
          "pack-voltage"
        ],
        "url": "https://lemonergy.com/learn/glossary/dc-dc-converter/",
        "mentions": [
          "charger"
        ]
      }
    },
    {
      "id": "term:onboard-charger",
      "type": "Term",
      "label": "Onboard charger",
      "properties": {
        "id": "onboard-charger",
        "name": "Onboard charger",
        "abbr": "OBC",
        "section": "topic-infrastructure",
        "definition": "The converter inside the vehicle that turns AC from a home or public socket into DC for the pack, typically rated 7–22 kW. DC fast chargers bypass it, which is why they can be so much more powerful.",
        "related": [
          "charger",
          "dc-fast-charging",
          "cc-cv-charging",
          "un-r10",
          "slow-charging"
        ],
        "url": "https://lemonergy.com/learn/glossary/onboard-charger/",
        "mentions": []
      }
    },
    {
      "id": "term:insulation-resistance",
      "type": "Term",
      "label": "Insulation resistance",
      "properties": {
        "id": "insulation-resistance",
        "name": "Insulation resistance",
        "aka": [
          "isolation resistance",
          "IMD"
        ],
        "section": "topic-hvsafety",
        "definition": "The resistance between the high-voltage circuit and the vehicle chassis, which must stay above about 100 Ω per volt of pack voltage so a person touching the chassis is safe. An insulation monitoring device measures it continuously.",
        "unit": "Ω/V",
        "related": [
          "pack-voltage",
          "high-voltage-interlock",
          "functional-safety",
          "insulation-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/insulation-resistance/",
        "mentions": [
          "volt"
        ]
      }
    }
  ]
}