ELECTRIC CAR AND CONTROL METHOD THEREOF
First Claim
1. A control method of an electric vehicle, comprising:
- calculating an estimated required power level from a request torque value obtained when a driver operates an accelerator and a currently consumed power level discharged from a battery pack to each element of the electric vehicle;
comparing the estimated required power level with a maximum dischargeable power level of the battery pack; and
calculating a possible maximum torque value from the maximum dischargeable power level if the estimated required power level is greater than the maximum dischargeable power level, to drive a motor by the possible maximum torque value.
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Accused Products
Abstract
The present invention relates to an electric car which has a battery pack at a constant state of maximum power discharge and to a method of efficiently controlling a motor with due consideration for rechargeable power levels. The control method according to one embodiment of the present invention, comprises the steps of: calculating estimated power levels required, based on current power consumption levels, for providing current from the battery pack to all parts of an electric car, and the required torque according to a driver'"'"'s activation of the accelerator; comparing the estimated power levels required with the maximum possible power discharge from the battery pack; and enabling maximum possible torque from the motor when the estimated power levels required exceeds the current maximum possible power discharge from the battery pack.
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Citations
18 Claims
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1. A control method of an electric vehicle, comprising:
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calculating an estimated required power level from a request torque value obtained when a driver operates an accelerator and a currently consumed power level discharged from a battery pack to each element of the electric vehicle; comparing the estimated required power level with a maximum dischargeable power level of the battery pack; and calculating a possible maximum torque value from the maximum dischargeable power level if the estimated required power level is greater than the maximum dischargeable power level, to drive a motor by the possible maximum torque value. - View Dependent Claims (2, 3, 4, 5)
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6. A control method of an electric vehicle, comprising:
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calculating an estimated charge power level from a request torque value obtained when a driver operates a brake and a currently consumed power level discharged from a battery pack to each element of the electric vehicle; comparing the estimated charge power level with a maximum rechargeable power level of the battery pack; and calculating a possible maximum torque value from the maximum rechargeable power level if the estimated charge power level is greater than the maximum rechargeable power level, to allow a motor to charge the battery pack by the possible maximum torque value. - View Dependent Claims (7, 8, 9, 10)
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11. A motor torque control method of an electric vehicle, comprising:
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calculating a request torque value based on acceleration information, braking information, and a vehicle speed; determining an allowable maximum torque value with respect to the request torque value based on a residual power quantity and voltage of a battery; calculating a corrected torque value by applying a weighted torque value based on an one-side torque output factor to the allowable maximum torque value when one-sided torque output occurs; and controlling a motor using a final torque value that is calculated by changing the corrected torque value and a current torque value used for motor control based on a preset rate. - View Dependent Claims (12, 13, 14)
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15. An electric vehicle comprising:
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an interface unit including an accelerator sensor to output acceleration information as a driver operates an accelerator, and a brake sensor to output braking information as the driver operates a brake; a battery pack to discharge electric power; a vehicle control module for calculating an estimated required power level from a request torque value based on the acceleration information and a currently consumed power level discharged from the battery pack, and comparing the estimated required power level with a maximum dischargeable power level of the battery pack; and a motor to be driven a possible maximum torque value that is calculated from the maximum dischargeable power level by the vehicle control module if the estimated required power level is greater than the maximum dischargeable power level. - View Dependent Claims (16, 17)
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18. An electric vehicle comprising:
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an interface unit to output braking information as a driver operates a brake; a battery pack to discharge electric power; a vehicle control module for calculating an estimated charge power level from a request torque value based on the braking information and a currently consumed power level discharged from the battery pack, and comparing the estimated charge power level with a maximum rechargeable power level of the battery pack; and a motor to charge the battery pack by a possible maximum torque value that is calculated from the maximum rechargeable power level by the vehicle control module if the estimated charge power level is greater than the maximum rechargeable power level.
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Specification