ELECTROMECHANICAL BRAKE SYSTEM AND OPERATING METHOD THEREOF

An electromechanical brake system may include a footer that is provided to advance and retreat, a motor that provides power, a reduction gear unit that reduces and transmits the power of the motor, a power conversion unit that receives the power reduced by the reduction gear unit, converts a rotational motion into a linear motion, and provides the power to the footer, an actuator housing, and a stopper that is provided to be in contact with at least a portion of a rear surface or a rear end portion of the ball screw shaft and restricts an allowable retraction range of the ball screw shaft or a maximum separation range of the brake pad with respect to a disc.