{
  "$type": "site.standard.document",
  "description": "An electrical substation that transforms AC voltage to DC voltage is configurable between a current-source mode for charging batteries of a stationary work machine and a voltage-source mode for powering motors of a moving work machine. The substation receives medium-voltage AC power from a grid and…",
  "path": "/patents/1380588",
  "publishedAt": "2026-04-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02M7/003",
    "Caterpillar Inc."
  ],
  "textContent": "An electrical substation that transforms AC voltage to DC voltage is configurable between a current-source mode for charging batteries of a stationary work machine and a voltage-source mode for powering motors of a moving work machine. The substation receives medium-voltage AC power from a grid and includes a pair of DC power converters each formed from three-phase transformers and a single stage of silicon-controlled rectifier units. Adjustable connectors enable combining the power converters in parallel or keeping them separate to operate in the current-source mode for charging the machine batteries with up to 4800ADC at 6 MW or for providing up to 1500VDC in powering voltage. The connectors further enable combining the power converters in series to operate in the voltage-source mode for powering the machine motors with up to 3000VDC at 6 MW. Sized to fit within a standard high-cube ISO shipping container with minimal components, the portable substation provides versatility with high power density and low cost per kilowatt.",
  "title": "AC/DC SUBSTATION CONFIGURABLE BETWEEN CHARGING AND POWERING MODES"
}