Electric brake apparatus
AssigneeHitachi Astemo, Ltd.
InventorsDaichi Nomura, Takuya Usui
Life of this patent
Estimating the term…
Abstract
An electric brake apparatus includes an electric motor including driving circuits, a brake mechanism configured to press a braking member against a braking target member based on driving of the electric motor, and a control device configured to control the driving of the electric motor. The control device is configured to detect contact between the braking member and the braking target member based on a change in a current of the electric motor when power is supplied to a part of the driving circuits. A change amount of the current between before and after the braking member and the braking target member contact each other is larger when power is supplied to the part of the driving circuits than when power is supplied to all of the driving circuits.
Claims3
An electric brake apparatus comprising:
- an electric motor including driving circuits;
- a brake mechanism configured to press a braking member against a braking target member based on driving of the electric motor;
- and
- a control device configured to control the driving of the electric motor,
- wherein the control device is configured to supply power to a part of the driving circuits when all of the driving circuits are operating normally such that a gradient of a change in a current of the electric motor with respect to a thrust force for generating a braking force increases to detect contact between the braking member and the braking target member based on the change in the current of the electric motor.
Dependencies are inferred from the claim text.