{
  "$type": "site.standard.document",
  "description": "A drive system 100. The drive system 100 comprises: a main power supply 03; a converter 04, configured to receive power from the main power supply and provide a multi-phase driving current; a permanent magnet motor 08a, 08b, 08c, 08d, configure to receive the multi-phase driving current; one or…",
  "path": "/patents/1426970",
  "publishedAt": "2026-06-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L3/0061",
    "HITACHI RAIL LTD [GB]"
  ],
  "textContent": "A drive system 100. The drive system 100 comprises: a main power supply 03; a converter 04, configured to receive power from the main power supply and provide a multi-phase driving current; a permanent magnet motor 08a, 08b, 08c, 08d, configure to receive the multi-phase driving current; one or more contactors 06a, 06b located between the converter and the permanent magnet motor, configured to selectively isolate the permanent magnet motor from the converter; a voltage sensor 07a, 07b, configured to sense a voltage between one or more pairs of phases of the multi-phase driving current at a position between the one or more contactors and the permanent magnet motor; and a controller 05, configured, whilst the one or more contactors are open, to receive the sensed voltage(s) from the voltage sensor and detect a short-circuit fault of the permanent magnet motor on the basis of the received sensed voltage(s).",
  "title": "DRIVE SYSTEM, VEHICLE, AND METHOD"
}