US 2015/0308530 A1 · MOTOR CONTROL SYSTEM AND METHOD FOR WEAR COMPENSATION OF ELECTROMECHANICAL BRAKE

Abstract

A motor control system for wear compensation between a disc and a pad in an electromechanical brake is disclosed. The system includes a switching unit configured to select a force control loop when a state of the electronic pedal is an applied state and select a velocity control loop when the state of the electronic pedal is a released state, an angular displacement amount calculation unit configured to calculate an angular displacement amount for reverse rotation of a motor for the wear compensation using a clamping force measured by a clamping force sensor of the force control loop when the velocity control loop is selected, and an angular velocity profile generation unit configured to generate an angular velocity profile having an area of the calculated angular displacement amount, generate an angular velocity command value at every sampling time from the generated angular velocity profile, and apply the generated value to the velocity control loop.

Claims14

Dependent claims

A motor control system for wear compensation between a disc and a pad in an electromechanical brake, the motor control system comprising:

a switching unit configured to select one of a force control loop for controlling torque of a motor according to whether there is contact between a foot of a driver and an electronic pedal (E-pedal) and a velocity control loop for controlling a velocity of the motor;
an angular displacement amount calculation unit configured to calculate an angular displacement amount for reverse rotation of the motor for the wear compensation using a clamping force (Fmeasured-ApplyStep) measured by a clamping force sensor of the force control loop when the velocity control loop is selected;
and
an angular velocity profile generation unit configured to generate an angular velocity profile having an area of the calculated angular displacement amount, generate an angular velocity command value at every sampling time from the generated angular velocity profile, and apply the generated angular velocity command value to the velocity control loop.

1 more element

A motor control method for wear compensation between a disc and a pad in an electromechanical brake, the motor control method comprising:

selecting one of a force control loop for controlling torque of a motor and a velocity control loop for controlling a velocity of the motor;
calculating an angular displacement amount for reverse rotation of the motor for the wear compensation using a clamping force (Fmeasured-ApplyStep) measured by a clamping force sensor of the force control loop when the velocity control loop is selected;
generating an angular velocity profile having an area of the calculated angular displacement amount, generating an angular velocity command value at every sampling time from the generated angular velocity profile, and applying the generated angular velocity command value to the velocity control loop;
and
performing control for reducing an error between real angular velocity information acquired from information of an encoder mounted on the motor and the angular velocity command value applied to the velocity control loop through a process of comparing the real angular velocity information to the angular velocity command value.

2 more elements

Dependencies are inferred from the claim text.

Motor control system and method for wear compensation of electromechanical brake

Life of this patent

Motor control system and method for wear compensation of electromechanical brake

Life of this patent

Abstract

Claims14