{
  "$type": "site.standard.document",
  "description": "A power conversion apparatus includes a filter capacitor, a contactor to electrically connect the filter capacitor to a power source or electrically disconnect the filter capacitor from the power source, and a failure determiner to determine whether a failure occurs in the contactor. When the…",
  "path": "/patents/1309747",
  "publishedAt": "2022-01-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02M7/53875",
    "Mitsubishi Electric Corporation"
  ],
  "textContent": "A power conversion apparatus includes a filter capacitor, a contactor to electrically connect the filter capacitor to a power source or electrically disconnect the filter capacitor from the power source, and a failure determiner to determine whether a failure occurs in the contactor. When the contactor is kept closed during a determination period since closing of the contactor and a reduction in the voltage in the filter capacitor during the determination period is greater than or equal to a reference value, the failure determiner determines occurrence of a failure in the contactor.",
  "title": "POWER CONVERSION DEVICE AND FAILURE DETERMINATION METHOD"
}