{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "Disclosed is an apparatus for correcting an offset of a current sensor. The apparatus includes an inverter (100), a detector (200), and a RMS calculator (400), and a controller (500). The RMS calculator converts the high frequency component extracted from the filter into an effective (RMS) value…",
  "path": "/patents/936399",
  "publishedAt": "2016-10-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L3/0038",
    "LSIS CO LTD [KR]"
  ],
  "textContent": "Disclosed is an apparatus for correcting an offset of a current sensor. The apparatus includes an inverter (100), a detector (200), and a RMS calculator (400), and a controller (500). The RMS calculator converts the high frequency component extracted from the filter into an effective (RMS) value. The controller, if the effective (RMS) value of the d-axis or q-axis current transformed by the RMS calculator is larger than a preset reference, increases/decreases a currently-set DC offset of each of the current sensors by a certain amount, and replaces the currently-set DC offsets with a DC offset corresponding to a smallest one of the effective (RMS) values of the d-axis or q-axis transformed by the RMS calculator, thereby correcting each of the current sensors. Accordingly, a pulsation in an output torque in controlling an electric motor can be effectively prevented.",
  "title": "APPARATUS FOR CORRECTING OFFSET OF CURRENT SENSOR"
}