{
  "$type": "site.standard.document",
  "description": "Conventionally, there is a problem that switching loss of an inverter increases in a case where a change such as improvement in a switching frequency is involved. The battery voltage E and the torque command T* are input to the first current command generation unit . The battery voltage E, the…",
  "path": "/patents/1330502",
  "publishedAt": "2022-10-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02P21/16",
    "HITACHI ASTEMO, LTD."
  ],
  "textContent": "Conventionally, there is a problem that switching loss of an inverter increases in a case where a change such as improvement in a switching frequency is involved. The battery voltage E and the torque command T* are input to the first current command generation unit . The battery voltage E, the torque command T*, and a voltage utilization rate obtained by dividing a line voltage effective value by a battery voltage (DC voltage) are input to a second current command generation unit . A magnet temperature Tmag of a rotor magnet is input to a current command selection unit , and a current command output from the first current command generation unit is selected in normal operation, and the second current command generation unit is selected in a case where the magnet temperature exceeds a predetermined value. The second current command generation unit is configured not to obtain the voltage utilization rate of 0.3 to 0.4.",
  "title": "MOTOR CONTROL DEVICE, ELECTROMECHANICAL INTEGRATED UNIT, AND ELECTRIC VEHICLE SYSTEM"
}