{
  "$type": "site.standard.document",
  "description": "An object of the present invention is to improve availability when a power is lost. In a power conversion device , a gate drive power supply circuit can supply a gate drive power within a predetermined normal voltage range. A backup power supply circuit supplies the gate drive power to a lower arm…",
  "path": "/patents/1283974",
  "publishedAt": "2021-02-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02M7/53871",
    "HITACHI AUTOMOTIVE SYSTEMS, LTD."
  ],
  "textContent": "An object of the present invention is to improve availability when a power is lost. In a power conversion device , a gate drive power supply circuit can supply a gate drive power within a predetermined normal voltage range. A backup power supply circuit supplies the gate drive power to a lower arm gate circuit when a voltage of the gate drive power applied from the gate drive power supply circuit to the lower arm gate circuit falls below a normal voltage range. When the gate drive power is supplied from the backup power supply circuit , the lower arm gate circuit drives a lower arm switching circuit in a short state in which all switching elements of the lower arm switching circuit are turned on.",
  "title": "POWER CONVERSION DEVICE"
}