DRIVE CONTROL SYSTEM FOR ELECTRIC MOTOR AND METHOD OF CONTROLLING ELECTRIC MOTOR
First Claim
1. A drive control system for an electric motor, comprising:
- a slippage determination device configured to determine whether a drive wheel of a vehicle slips;
a tentative vibration damper torque calculator configured to calculate a tentative vibration damper torque to reduce a variation component of a rotational speed of one ofa drive axle mechanically connected to the drive wheel, andthe electric motor mounted in the vehicle as a drive source;
a vibration damper torque limit value setting device configured to set, for a predetermined period of time after the slippage determination device determines that the drive wheel slips, a limit value to limit a vibration damper torque that increases an absolute value of the rotational speed of the electric motor or the drive axle;
a vibration damper torque setting device configured to set a control torque obtained by limiting the tentative vibration damper torque using the limit value set by the vibration damper torque limit value setting device; and
a control device configured to control driving of the electric motor in accordance with a command value of a torque obtained by combining a requested torque for the electric motor with the control torque set by the vibration damper torque setting device.
1 Assignment
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Accused Products
Abstract
A drive control system for an electric motor includes a slippage determination device, a tentative vibration damper torque calculator, a vibration damper torque limit value setting device, a vibration damper torque setting device, and a control device. The vibration damper torque setting device is configured to set a control torque obtained by limiting a tentative vibration damper torque using a limit value set by the vibration damper torque limit value setting device. The control device is configured to control driving of the electric motor in accordance with a command value of a torque obtained by combining a requested torque for the electric motor with the control torque set by the vibration damper torque setting device.
25 Citations
7 Claims
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1. A drive control system for an electric motor, comprising:
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a slippage determination device configured to determine whether a drive wheel of a vehicle slips; a tentative vibration damper torque calculator configured to calculate a tentative vibration damper torque to reduce a variation component of a rotational speed of one of a drive axle mechanically connected to the drive wheel, and the electric motor mounted in the vehicle as a drive source; a vibration damper torque limit value setting device configured to set, for a predetermined period of time after the slippage determination device determines that the drive wheel slips, a limit value to limit a vibration damper torque that increases an absolute value of the rotational speed of the electric motor or the drive axle; a vibration damper torque setting device configured to set a control torque obtained by limiting the tentative vibration damper torque using the limit value set by the vibration damper torque limit value setting device; and a control device configured to control driving of the electric motor in accordance with a command value of a torque obtained by combining a requested torque for the electric motor with the control torque set by the vibration damper torque setting device. - View Dependent Claims (2, 3, 4, 5)
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6. A drive control system for an electric motor, comprising:
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slippage determination means for determining whether a drive wheel of a vehicle slips; tentative vibration damper torque calculating means for calculating a tentative vibration damper torque to reduce a variation component of a rotational speed of one of a drive axle mechanically connected to the drive wheel, and the electric motor mounted in the vehicle as a drive source; vibration damper torque limit value setting means for setting, for a predetermined period of time after the slippage determination means determines that the drive wheel slips, a limit value to limit a vibration damper torque that increases an absolute value of the rotational speed of the electric motor or the drive axle; vibration damper torque setting means for setting a control torque obtained by limiting the tentative vibration damper torque using the limit value set by the vibration damper torque limit value setting means; and control means for controlling driving of the electric motor in accordance with a command value of a torque obtained by combining a requested torque for the electric motor with the control torque set by the vibration damper torque setting means.
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7. A method of controlling an electric motor, the method comprising:
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determining whether a drive wheel of a vehicle slips; calculating a tentative vibration damper torque to reduce a variation component of a rotational speed of one of a drive axle mechanically connected to the drive wheel, and the electric motor mounted in the vehicle as a drive source; setting, for a predetermined period of time after it is determined that the drive wheel slips, a limit value to limit a vibration damper torque that increases an absolute value of the rotational speed of the electric motor or the drive axle; setting a control torque obtained by limiting the tentative vibration damper torque using the limit value; and controlling driving of the electric motor in accordance with a command value of a torque obtained by combining a requested torque for the electric motor with the control torque.
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Specification