{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreiecyurxdqnlcnifannwwan657vvktmdrvpotyo3qtmptox5q3mpka"
    },
    "mimeType": "image/png",
    "size": 91969
  },
  "description": "A power conversion apparatus includes a direct current end, a positive direct current bus, a negative direct current bus, a positive bus capacitor, a negative bus capacitor, at least three inverter bridge arms, a switch unit, a controller, and filter inductors, filter capacitors, and alternating…",
  "path": "/patents/1423720",
  "publishedAt": "2026-06-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02M1/0054",
    "HUAWEI TECHNOLOGIES CO., LTD."
  ],
  "textContent": "A power conversion apparatus includes a direct current end, a positive direct current bus, a negative direct current bus, a positive bus capacitor, a negative bus capacitor, at least three inverter bridge arms, a switch unit, a controller, and filter inductors, filter capacitors, and alternating current ends that correspond to the at least three inverter bridge arms. A third end of each inverter bridge arm sequentially passes through a filter inductor, a filter capacitor, and a switch unit that correspond to each inverter bridge arm, and is connected to a bus midpoint. The controller is configured to: when a voltage of a power grid is less than or equal to a first voltage threshold, control the switch unit to be turned off or impedance of the switch unit to be increased; then control a amplitude of the modulated wave of each inverter bridge arm to increase.",
  "title": "POWER CONVERSION APPARATUS"
}