{
  "$type": "site.standard.document",
  "description": "A method is described for the diagnosis of the offset of the resolver of an electric machine, comprising acquiring a predetermined offset of a resolver associated with the electric machine; in a first transient, supplying an excitation current to the phases of the electric machine so as to…",
  "path": "/patents/953412",
  "publishedAt": "2016-02-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L15/025",
    "MAGNETI MARELLI SPA [IT]"
  ],
  "textContent": "A method is described for the diagnosis of the offset of the resolver of an electric machine, comprising acquiring a predetermined offset of a resolver associated with the electric machine; in a first transient, supplying an excitation current to the phases of the electric machine so as to determine the injection of an exploring excitation current on an axis d of minimum reluctance of the electric machine, in which the position of axis d is determined as a function of the predetermined offset of the resolver; in a second and in a third transient, respectively, supplying an excitation current to the phases of the electric machine so as to determine the injection of an exploring excitation current on the axis d of the electric machine, in which the position of the axis d is determined as a function of a offset of the resolver modified by a predetermined amount of deviation, in excess, respectively in defect with respect to the predetermined offset of the resolver. As a consequence of the excitation current, a current established on the axis d of minimum reluctance and a current established on an axis q in phase quadrature with respect to the axis of minimum reluctance are determined. The correctness of the offset of the resolver is diagnosed if the current established on the axis d in the first transient is higher than the current established on the axis d in the second or third transient, and if the current established on the axis q in the first transient is lower than the current established on the axis q in the second or third transient. An error in the offset of the resolver is diagnosed if the current established on the axis d in the first transient is lower than the current established on the axis d in the second or third transient, or if the current established on the axis q in the first transient is higher than the current established on the axis q in the second or third transient.",
  "title": "METHOD FOR THE DIAGNOSIS OF THE OFFSET OF THE RESOLVER OF AN ELECTRIC MACHINE"
}