{
  "$type": "site.standard.document",
  "description": "Provided are an electric brake device and an electric brake device system that can prevent pad wear from progressing beyond its limit and that can estimate the wear of a friction pad without involving increase in cost and space. The electric brake device includes an electric motor (2), a friction…",
  "path": "/patents/931405",
  "publishedAt": "2017-02-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T13/741",
    "NTN TOYO BEARING CO LTD [JP]"
  ],
  "textContent": "Provided are an electric brake device and an electric brake device system that can prevent pad wear from progressing beyond its limit and that can estimate the wear of a friction pad without involving increase in cost and space. The electric brake device includes an electric motor (2), a friction pad (6), a linear motion mechanism (4), a braking force command section (26a), a braking force estimation section (30), and a controller (7). The controller (7) is provided with a pad wear amount estimation section (37) to estimate a wear amount of the friction pad and a motor rotation angle detector (28) to detect a motor rotation angle. The pad wear amount estimation section (37) estimates a wear amount of the friction pad (6) from the rotation angle of the electric motor (2), obtained by the motor rotation angle detector (28), which rotation angle corresponds to a distance between a retraction end at which a linear motion portion (14) of the linear motion mechanism (4) is separated from a brake rotor (5) and an advance end at which the linear motion portion (14) approaching the brake rotor (5) generates the braking force.",
  "title": "ELECTRIC BRAKE DEVICE AND ELECTRIC BRAKE DEVICE SYSTEM"
}