Apparatus and method for controlling motor position and creep of electric vehicle
First Claim
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1. An apparatus for controlling motor position and creep of an electric vehicle, the apparatus comprising:
- a motor position determiner for determining the duration of motor position control from the stop of the vehicle to a predetermined time after release of a brake pedal;
a motor position controller for maintaining the position of a motor by calculating a motor torque for maintaining the position of the motor; and
a creep torque controller for generating a creep torque of the motor after a time delay and controlling the motor speed to be at a constant level.
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Abstract
The present invention provides an apparatus and method for controlling motor position and creep of an electric vehicle, in which when a running vehicle is stopped, motor position control for maintaining the vehicle in the stopped position even when a brake pedal is released is performed, and then creep torque control is performed such that the vehicle is prevented from rolling backwards and suddenly starting when the vehicle is restarted after a stop on a slope.
27 Citations
34 Claims
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1. An apparatus for controlling motor position and creep of an electric vehicle, the apparatus comprising:
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a motor position determiner for determining the duration of motor position control from the stop of the vehicle to a predetermined time after release of a brake pedal; a motor position controller for maintaining the position of a motor by calculating a motor torque for maintaining the position of the motor; and a creep torque controller for generating a creep torque of the motor after a time delay and controlling the motor speed to be at a constant level. - View Dependent Claims (2, 3, 4)
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5. A method for controlling motor position and creep of an electric vehicle, the method comprising:
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a motor position control step of controlling backlash compensation to eliminate backlash when a brake pedal is depressed during running and then applying a motor torque to maintain the position of a motor when the brake pedal is released; a motor position stabilization check step of checking whether to continue to maintain the motor position or to enter a creep torque control step after a predetermined time; and the creep torque control step of constantly increasing the motor torque from a stabilization torque for maintaining the motor position to a maximum creep torque. - View Dependent Claims (6, 7, 8, 9)
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10. An apparatus for controlling motor position and creep of an electric vehicle, the apparatus comprising:
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a slope determiner for determining whether to enter a motor position control mode or a creep torque control mode based on detection information of a slope angle sensor detecting a slope angle of a traveling road upon release of a brake pedal after the vehicle is stopped; a motor position controller for maintaining the position of a motor by calculating a motor torque; and a creep torque controller for generating a creep torque of the motor after a time delay and controlling the motor speed to be at a constant level. - View Dependent Claims (11, 12, 13)
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14. A method for controlling motor position and creep of an electric vehicle, the method comprising:
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a slope determination step of determining whether to enter a motor position control step or a creep torque control step by measuring a slope angle of a traveling road and determining whether the slope angle is enough to make the vehicle roll backwards upon release of a brake pedal; the motor position control step of entering the creep torque control step if the slope angle is less than a reference slope angle for the slope determination and increasing the motor torque to maintain the motor position if the slope angle is greater than the reference slope angle for the slope determination; a motor position stabilization check step of checking whether to continue to maintain the motor position or to enter the creep torque control step after a predetermined time; and a creep torque control step of constantly increasing the motor torque from a stabilization torque for maintaining the motor position to a maximum creep torque. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. An apparatus for controlling motor position and creep of an electric vehicle, the apparatus comprising:
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a rolling determiner for determining whether or not the vehicle is rolling backwards upon release of a brake pedal after the vehicle is stopped; a motor position controller for maintaining the position of a motor by calculating a motor torque; and a creep torque controller for generating a creep torque of the motor after a time delay and controlling the motor speed to be at a constant level. - View Dependent Claims (22, 23, 24, 25)
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26. A method for controlling motor position and creep of an electric vehicle, the method comprising:
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a rolling determination step of determining whether or not the vehicle is rolling backwards upon release of a brake pedal; a motor position control step of entering a creep torque control step if it is determined that the vehicle is not rolling backwards and applying a torque for maintaining the position of a motor if it is determined that the vehicle is rolling backwards; a motor position stabilization check step of checking whether to continue to maintain the motor position or to enter the creep torque control step after a predetermined time; and a creep torque control step of constantly increasing the motor torque from a stabilization torque for maintaining the motor position to a maximum creep torque. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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33. An apparatus for controlling motor position and creep of an electric vehicle, the apparatus comprising:
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a motor position determiner for determining the duration of motor position control from the stop of the vehicle to a time after release of a brake pedal; a motor position controller for maintaining the position of a motor by calculating a motor torque for maintaining the position of the motor; and a creep torque controller for generating a creep torque of the motor. - View Dependent Claims (34)
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Specification