Patent ID: 9746041
Date: 2017-08-29
CPC Classifications: B60T,F16D

Claim:
1. An electric brake device includes a brake rotor, a brake pad, an electric motor, a linear motion mechanism configured to convert a rotary motion of the electric motor into a linear motion to transmit the linear motion to the brake pad, and a controller configured to control the electric motor, the controller comprising: a motor angular velocity control section configured to control an angular velocity of the electric motor; and a motor angular velocity limiting section configured to limit the angular velocity of the electric motor through the motor angular velocity control section such that an angular velocity ωb of the electric motor in a no-load state when the electric brake device shifts from a non-braking state to a braking state and an angular velocity ωr of the electric motor in a no-load state when the electric brake device shifts from the braking state to the non-braking state satisfy |ωb|>|ωr| in which the angular velocity ωb is controlled by the motor angular velocity control section when the electric brake device shifts from the non-braking state where a clearance is formed between the brake pad and the brake rotor to the braking state where the clearance is zero, and in which the angular velocity ωr is controlled by the motor angular velocity control section when the electric brake device shifts from the braking state to the non-braking state.