{
  "$type": "site.standard.document",
  "description": "A railway vehicle on which a rotary electric machine is mounted, the railway vehicle comprising, in order to detect slip or slide in an early stage while stabilizing a control system even at the time of slip or slide: a voltage output device for outputting a drive voltage to the rotary electric…",
  "path": "/patents/1396570",
  "publishedAt": "2026-03-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L15/025",
    "HITACHI LTD [JP]"
  ],
  "textContent": "A railway vehicle on which a rotary electric machine is mounted, the railway vehicle comprising, in order to detect slip or slide in an early stage while stabilizing a control system even at the time of slip or slide: a voltage output device for outputting a drive voltage to the rotary electric machine; a current detector for detecting a current flowing through the rotary electric machine; and a control device for estimating and calculating the angular velocity of a rotor of the rotary electric machine. The control device calculates a compensation value for correcting a quantity of state to be used as input for estimating and calculating the angular velocity in order to suppress a steady-state deviation generated in the quantity of state to substantially zero while the rotary electric machine is being accelerated or decelerated, and when the compensation value exceeds a predetermined value, detects the slip or slide of a drive wheel driven by the rotary electric machine.",
  "title": "DRIVE DEVICE AND DRIVE METHOD FOR ROTARY ELECTRIC MACHINE, AND RAILWAY VEHICLE"
}