{
  "$type": "site.standard.document",
  "description": "A control device includes: a PWM generation unit that outputs a PWM drive signal to an inverter ; and a torque limiting unit that outputs a post-limitation torque command to the PWM generation unit based on a torque command from a higher-order control unit and a motor temperature. The torque…",
  "path": "/patents/1338942",
  "publishedAt": "2023-03-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L15/06",
    "Hitachi Astemo, Ltd."
  ],
  "textContent": "A control device includes: a PWM generation unit that outputs a PWM drive signal to an inverter ; and a torque limiting unit that outputs a post-limitation torque command to the PWM generation unit based on a torque command from a higher-order control unit and a motor temperature. The torque limiting unit includes: a torque limiting factor calculation unit that calculates a torque limiting factor based on the motor temperature; and a post-limitation torque calculation unit that outputs the post-limitation torque command to the PWM generation unit based on the torque command and the torque limiting factor. The torque limiting factor calculation unit limits an output torque based on the motor temperature in a case where the motor temperature is higher than a predetermined temperature, and limits a torque to make the torque change more gently in a case where a rate of change over time in the motor temperature is larger than a predetermined value as compared with a case where the rate of change over time is equal to or smaller than the predetermined value.",
  "title": "CONTROL DEVICE"
}