A 1500 kg electric vehicle travels along an asphalt roadway with a 5° grade at 100 km/h and a rolling resistance coefficient of 0.013. The frontal area is 2.05 m² and a drag coefficient is 0.32. The battery capacity is 85kWh and the battery nominal voltage is 320V. The air density of 1.2 kg/m3. (a) What is the power required to propel this vehicle? (b) The gear ratio is 10.7, the tire radius is 0.23m. Assume 100% efficiency for the gear. (i) What is the torque seen by the ac propulsion motor (ii) What is the power and speed of the motor? (c) What is the range of the vehicle considering 80% Depth of Discharge on a flat road at a speed of 50 km/h?
A 1500 kg electric vehicle travels along an asphalt roadway with a 5° grade at 100 km/h and a rolling resistance coefficient of 0.013. The frontal area is 2.05 m² and a drag coefficient is 0.32. The battery capacity is 85kWh and the battery nominal voltage is 320V. The air density of 1.2 kg/m3. (a) What is the power required to propel this vehicle? (b) The gear ratio is 10.7, the tire radius is 0.23m. Assume 100% efficiency for the gear. (i) What is the torque seen by the ac propulsion motor (ii) What is the power and speed of the motor? (c) What is the range of the vehicle considering 80% Depth of Discharge on a flat road at a speed of 50 km/h?
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.26P
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