1. What is Motor Input Power?

Input power is the electrical power consumed by a motor to produce mechanical output power. It accounts for energy losses in the system due to inefficiencies.

2. How Does the Calculator Work?

The calculator uses the input power formula:

Where:

• \( P_{in} \) — Input power (watts)
• \( P_{out} \) — Output mechanical power (watts)
• \( \eta \) — Efficiency (decimal between 0 and 1)

Explanation: The formula shows that input power equals output power divided by the motor's efficiency. Lower efficiency means more input power is needed for the same output.

3. Importance of Input Power Calculation

Details: Calculating input power helps in sizing electrical systems, estimating energy consumption, and determining operating costs for electric vehicles.

4. Using the Calculator

Tips: Enter output power in watts and efficiency as a decimal (e.g., 0.85 for 85%). Efficiency must be between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What's typical efficiency for car motors?
A: Modern electric car motors typically have 85-95% efficiency under normal operating conditions.

Q2: How does this relate to battery capacity?
A: Input power helps estimate how much energy will be drawn from the battery to achieve desired mechanical output.

Q3: Why is efficiency less than 100%?
A: Energy is lost to heat, friction, and other factors in the motor and drivetrain.

Q4: How does this affect range in electric cars?
A: Higher input power requirements (due to lower efficiency) reduce the vehicle's range per charge.

Q5: Can I use this for other motors?
A: Yes, the formula applies to any electric motor, though efficiency values may vary.