{
  "$type": "site.standard.document",
  "description": "Regarding a brushless motor control device and a control method, the phase voltage Vsu of any one phase of the three-phase brushless motor is detected by a sub-coil (Su) (6). A time interval between adjacent zero-cross points a1 and a2 thereof is measured. Based on the time interval between the…",
  "path": "/patents/977834",
  "publishedAt": "2014-03-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02N11/04",
    "SHINDENGEN ELECTRIC MFG [JP]"
  ],
  "textContent": "Regarding a brushless motor control device and a control method, the phase voltage Vsu of any one phase of the three-phase brushless motor is detected by a sub-coil (Su) (6). A time interval between adjacent zero-cross points a1 and a2 thereof is measured. Based on the time interval between the zero-cross points, a time T/3 and a time 2T/3 are calculated. Then, based on the time t/3 and the time 2T/3, phases of zero-cross points b1 and c1 of the two other phases are estimated. Then, based on the estimated zero-cross points b1 and c1, phases of the phase voltages of the two other phases are estimated, thereby controlling conduction on each phase coil of the three-phase brushless motor.",
  "title": "BRUSHLESS MOTOR CONTROL DEVICE AND BRUSHLESS MOTOR CONTROL METHOD"
}