{
  "$type": "site.standard.document",
  "description": "An inverter apparatus 2 includes a direct-current power supply 4, switching elements S and freewheel diodes D which are connected to the direct-current power supple 4, a means which converts a direct current voltage into a predetermined alternating current voltage, a predetermined current, and a…",
  "path": "/patents/998519",
  "publishedAt": "2012-09-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L3/003",
    "TOSHIBA KK [JP]"
  ],
  "textContent": "An inverter apparatus 2 includes a direct-current power supply 4, switching elements S and freewheel diodes D which are connected to the direct-current power supple 4, a means which converts a direct current voltage into a predetermined alternating current voltage, a predetermined current, and a predetermined frequency, depending on switching on/off of the switching elements S, a temperature detector C provided near at least one of the switching elements S, and a temperature estimation means 17. The Temperature estimation means 17 estimates temperature of switching elements not provided with the temperature detector, based on a loss model (Expression 1-6) of the switching elements S and freewheel diodes D, a thermal resistance model (Expression 7-9) of a module which fixes the switching elements S and freewheel diodes D, an estimated-temperature increase value calculated by the loss model and thermal resistance model, and a temperature of the switching element detected by the temperature detector C. Based on a temperature detected from one switching element, temperatures of other switching elements are estimated, regardless of operation of the inverter.",
  "title": "INVERTER DEVICE"
}