{
  "$type": "site.standard.document",
  "description": "In a drive system for standardizing a converter for a plurality of power sources, physical circuits as well as control of the converter need to be switched when a train enters a non-electrified route from an electrified route and when a train enters an electrified route from a non-electrified…",
  "path": "/patents/979087",
  "publishedAt": "2014-01-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L50/13",
    "HITACHI LTD [JP]"
  ],
  "textContent": "In a drive system for standardizing a converter for a plurality of power sources, physical circuits as well as control of the converter need to be switched when a train enters a non-electrified route from an electrified route and when a train enters an electrified route from a non-electrified route. There is a problem that a changeover process is complicated. A drive system includes, when an AC side of the converter (21,22) is switched from an overhead contact line to a power generator (6): a first step of terminating a switching operation of the converter to open a contactor (12) between the overhead contact line and the converter; a second step of closing a contactor (13) between the power generator and the converter to start a switching operation of converting a single-phase alternating current to a direct current by the converter; and a third step of permitting torque output from an electric motor (5).",
  "title": "Drive system and railway vehicle provided with the drive system"
}