{
  "$type": "site.standard.document",
  "description": "The present invention addresses the problem of properly performing motor control during overmodulation. In a motor control device , a carrier wave frequency adjusting unit adjusts a carrier wave frequency fc so as to change a voltage phase error Δθv representing the phase difference between…",
  "path": "/patents/1343082",
  "publishedAt": "2023-05-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02P27/08",
    "Hitachi Astemo, Ltd."
  ],
  "textContent": "The present invention addresses the problem of properly performing motor control during overmodulation. In a motor control device , a carrier wave frequency adjusting unit adjusts a carrier wave frequency fc so as to change a voltage phase error Δθv representing the phase difference between three-phase voltage commands Vu*, Vv*, Vw* and a triangular wave signal Tr. When a modulation factor H in accordance with the voltage amplitude ratio between the DC power supplied from a high voltage battery to an inverter and AC power output from the inverter to a motor exceeds a predetermined value, for example, 1.15, a current control unit corrects the amplitudes and phases of a d-axis voltage command Vd* and a q-axis voltage command Vq* on the basis of a carrier wave phase difference Δθcarr representing the phase of the triangular wave signal Tr.",
  "title": "MOTOR CONTROL DEVICE, ELECTROMECHANICAL UNIT, ELECTRIC VEHICLE SYSTEM, AND MOTOR CONTROL METHOD"
}