{
  "$type": "site.standard.document",
  "description": "An alternator (1) for use in an automotive vehicle includes a circuit for detecting initiation of rotation of an engine. Upon detecting the initiation of rotation, excitation current supply to a field winding (4) is started, and thereafter an alternator output is controlled by controlling the…",
  "path": "/patents/1097844",
  "publishedAt": "2003-03-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J7/14",
    "DENSO CORP [JP]"
  ],
  "textContent": "An alternator (1) for use in an automotive vehicle includes a circuit for detecting initiation of rotation of an engine. Upon detecting the initiation of rotation, excitation current supply to a field winding (4) is started, and thereafter an alternator output is controlled by controlling the excitation current. A resistor (53) is connected to one phase winding (Y) of an armature to obtain a voltage indicating initiation of rotation during a period in which no excitation current is supplied to the field winding (4), and a capacitor (21) is connected to another phase winding (Z) to raise the indicating voltage level. Since the indicating voltage induced by a small amount of residual magnetism is increased to a sufficient level by the capacitor (21), the initiation of rotation can be accurately detected.",
  "title": "Automotive alternator having detector for detecting initiation of rotation"
}