{
  "$type": "site.standard.document",
  "description": "An electromagnetic suspension apparatus for an automotive vehicle employs an electromagnetic actuator interposed between a sprung mass and an unsprung mass and arranged in parallel with a suspension spring element, and an electric motor built in the electromagnetic actuator for driving the…",
  "path": "/patents/1084974",
  "publishedAt": "2004-08-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60G17/0157",
    "NISSAN MOTOR [JP]"
  ],
  "textContent": "An electromagnetic suspension apparatus for an automotive vehicle employs an electromagnetic actuator interposed between a sprung mass and an unsprung mass and arranged in parallel with a suspension spring element, and an electric motor built in the electromagnetic actuator for driving the electromagnetic actuator. A motor controller calculates a displacement input, such as a suspension stroke acceleration and a suspension velocity, transmitted to the electromagnetic actuator, and controls the motor to bring a suspension damping force closer to a desired damping force suited for the displacement input. The motor controller calculates an internal inertia force of the electromagnetic actuator, and corrects or compensates for a motor output by the internal inertia force of the electromagnetic actuator.",
  "title": "Electromagnetic suspension system"
}