{
  "$type": "site.standard.document",
  "description": "A method and an apparatus for controlling a permanent magnet motor (30), a power system (100) and an electric vehicle. A power frequency of the permanent magnet motor (30) is set by obtaining system parameters such as a resonance bandwidth of the permanent magnet motor (30) and a natural frequency…",
  "path": "/patents/1412906",
  "publishedAt": "2023-04-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L15/007",
    "JIANGSU CONTEMPORARY AMPEREX TECH LTD [CN]"
  ],
  "textContent": "A method and an apparatus for controlling a permanent magnet motor (30), a power system (100) and an electric vehicle. A power frequency of the permanent magnet motor (30) is set by obtaining system parameters such as a resonance bandwidth of the permanent magnet motor (30) and a natural frequency of a stator of the permanent magnet motor (30), and the permanent magnet motor (30) is supplied power by using alternating current at the power frequency when a power battery (10) meets a self-heating condition. Noises generated by the motor (30) is reduced during a self-heating process of the power battery (10).",
  "title": "METHOD AND DEVICE FOR CONTROLLING PERMANENT MAGNET MOTOR, POWER SYSTEM, AND ELECTRIC VEHICLE"
}