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Electric Vehicle Design Online Course Power requirement Calculation
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S.NOProcessRemarks Power is required to overcome forces opposing the motion
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1Power requirement Calculation 1.Inertia
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2Electric Motor Selection 2. Friction at wheels
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3Battery Pack Capacity Calculation 3.Air Drag
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4Motor Controller Selection 4. Gradient
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5Wire Harness Selection
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6Accessories Selection Information of vehicle to design
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Gross Weight including driver 150 kg
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Acceleration required 6m/s^2
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Wheel diameter
279.4 mm
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Gradient 0%
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Air DragNone
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| Calculations | Formulas | Values |
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| Rolling Resistance | = Gravitational_Force * Cr * Gross_Vehicle_Weight
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| Aerodynamic Drag | =0.5 * Cd * Vehicle_Front_Area * Density_of_Air * Velocity^2
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| Total Force | =Rolling_Resistance + Aerodynamic_Drag
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| Grading Force | =Gravitational_Force * Gross_Vehicle_Weight * sin(Gradient_Angle)
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| Torque at Wheels | =Total_Force * Wheel_Radius
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| Torque at Motor Shaft | =Torque_at_Wheels / Gear_Ratio
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| Power Requirement | =Torque_at_Motor_Shaft * Angular_Velocity
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