Patent ID: 7806241

Claim:
An electric brake, comprising: a friction member; a rotor; a first piston configured to press the friction member to the rotor; a second piston configured to press the friction member to the rotor; a first motor configured to actuate the first piston; a second motor configured to actuate the second piston; a press sensor configured to detect an axial force of the first piston to press the friction member; a first position sensor configured to detect a position of the first piston; a second position sensor configured to detect a position of the second piston; and a controller configured to calculate a first signal as an operation signal of the first motor and a second signal as an operation signal of the second motor; wherein the first piston and the second piston are spaced in a circumferential direction of the rotor; wherein the detected axial force is fed back to the controller, and the controller calculate calculates the first signal based on the axial force; and wherein the detected position of the second piston is fed back to the controller, and the controller calculates the second signal so that the position of the second piston conforms to the detected position of the first piston.