Electric-vehicle testing device and method
First Claim
1. An electric-vehicle testing apparatus comprising:
- processing circuitry configured to;
generate a first signal corresponding to accelerator operation amount by a driver and a second signal corresponding to brake operation amount by the driver in accordance with test conditions that include a target vehicle speed pattern indicating a variation in target vehicle speed along a time series;
control torque of a test motor included in a test object based on a first command value corresponding to the first signal;
compute running resistance to be assumed when a vehicle runs using a rotation speed of the test motor;
compute braking force using the second signal and an actual vehicle speed obtained from the rotation speed of the test motor; and
control torque of a load motor coupled to the test motor, based on a second command value corresponding to the running resistance and the braking force,wherein the processing circuitry determines, as the braking force, a smaller one of a first braking force candidate corresponding to the second signal and a sum of a second braking force candidate corresponding to the actual vehicle speed and a first command value corresponding to creep torque of the vehicle.
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Accused Products
Abstract
According to one embodiment, an electric-vehicle testing apparatus includes processing circuitry. The circuitry generates a first signal corresponding to accelerator operation amount and a second signal corresponding to brake operation amount in accordance with test conditions. The circuitry controls torque of a test motor included in a test object. The circuitry computes running resistance to be assumed using a rotation speed of the test motor. The circuitry computes braking force using the second signal and an actual vehicle speed obtained from the rotation speed of the test motor. The circuitry controls torque of a load motor coupled to the test motor, based on a second command value corresponding to the running resistance and the braking force.
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Citations
18 Claims
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1. An electric-vehicle testing apparatus comprising:
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processing circuitry configured to; generate a first signal corresponding to accelerator operation amount by a driver and a second signal corresponding to brake operation amount by the driver in accordance with test conditions that include a target vehicle speed pattern indicating a variation in target vehicle speed along a time series; control torque of a test motor included in a test object based on a first command value corresponding to the first signal; compute running resistance to be assumed when a vehicle runs using a rotation speed of the test motor; compute braking force using the second signal and an actual vehicle speed obtained from the rotation speed of the test motor; and control torque of a load motor coupled to the test motor, based on a second command value corresponding to the running resistance and the braking force, wherein the processing circuitry determines, as the braking force, a smaller one of a first braking force candidate corresponding to the second signal and a sum of a second braking force candidate corresponding to the actual vehicle speed and a first command value corresponding to creep torque of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electric-vehicle testing method comprising:
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generating a first signal corresponding to accelerator operation amount by a driver and a second signal corresponding to brake operation amount by the driver in accordance with test conditions that include a target vehicle speed pattern indicating a variation in target vehicle speed along time series; controlling torque of a test motor included in a test object based on a first command value corresponding to the first signal; computing running resistance to be assumed when a vehicle runs using a rotation speed of the test motor; computing braking force using the second signal and an actual vehicle speed obtained from the rotation speed of the test motor; and controlling torque of a load motor coupled to the test motor, based on a second command value corresponding to the running resistance and the braking force, wherein the computing the braking force determines, as the braking force, a smaller one of a first braking force candidate corresponding to the second signal and a sum of a second braking force candidate corresponding to the actual, vehicle speed and a first command value corresponding to creep torque of the vehicle. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification