{
  "$type": "site.standard.document",
  "description": "A ripple extraction device (3) extracts ripple components contained in a current signal of a motor (2). The ripple extraction device (3) is provided with; a current-voltage converter (10) that converts a current signal of the motor (2) into a voltage signal; a filter (40) that filters the voltage…",
  "path": "/patents/979456",
  "publishedAt": "2014-01-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60N2/02",
    "TS TECH CO LTD [JP]"
  ],
  "textContent": "A ripple extraction device (3) extracts ripple components contained in a current signal of a motor (2). The ripple extraction device (3) is provided with; a current-voltage converter (10) that converts a current signal of the motor (2) into a voltage signal; a filter (40) that filters the voltage signal converted by the current-voltage converter (10), and attenuates the ripple components; and a differential amplifier ( 5 0) that obtains the difference between the voltage signal converted by the current-voltage converter (10) and an output signal of the filter (40).",
  "title": "RIPPLE EXTRACTION DEVICE, MOTOR CONTROL APPARATUS, VEHICLE SEAT, AND RIPPLE EXTRACTION METHOD"
}