{
  "$type": "site.standard.document",
  "description": "The shaft speeds of a plurality of electric motors are calculated, and a reference speed is calculated from the shaft speeds calculated. The states of detecting the shaft speeds are detected, thereby outputting state signals. In accordance with the state signals, inverter control units for…",
  "path": "/patents/1010794",
  "publishedAt": "2011-07-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L15/20",
    "TOSHIBA KK [JP]"
  ],
  "textContent": "The shaft speeds of a plurality of electric motors are calculated, and a reference speed is calculated from the shaft speeds calculated. The states of detecting the shaft speeds are detected, thereby outputting state signals. In accordance with the state signals, inverter control units for controlling the inverters controlling the electric motors, respectively, are switched between an acceleration detection control of calculating a torque-reducing value from the rate at which each shaft speed changes with time, and then reducing the torque by the torque-reducing value calculated, and a slip speed control of reducing the torque on the basis of the difference between the shaft speed of each electric motor and the reference speed.",
  "title": "ELECTRIC VEHICLE CONTROL DEVICE"
}