1. What is Motor Output Power?

Motor output power is the mechanical power delivered by a car's motor, calculated as the product of torque and angular speed. It represents the actual usable power available to move the vehicle.

2. How Does the Calculator Work?

The calculator uses the fundamental power equation:

Where:

• \( P_{out} \) — Output power in watts (W)
• \( T \) — Torque in newton-meters (Nm)
• \( \omega \) — Angular speed in radians per second (rad/s)

Explanation: This equation shows that power increases linearly with both torque and rotational speed. For car motors, this relationship helps determine the engine's performance characteristics.

3. Importance of Power Calculation

Details: Calculating motor output power is essential for understanding vehicle performance, comparing different engines, and designing powertrain systems. It directly relates to acceleration capability and top speed.

4. Using the Calculator

Tips: Enter torque in Nm (typically available in car specifications) and angular speed in rad/s. For RPM values, convert to rad/s by multiplying by π/30.

5. Frequently Asked Questions (FAQ)

Q1: How does this relate to horsepower?
A: 1 horsepower ≈ 745.7 watts. To convert the result to hp, divide the power in watts by 745.7.

Q2: What's typical torque for car engines?
A: Passenger cars typically range from 100-400 Nm, while performance cars can exceed 500 Nm.

Q3: How do I find angular speed?
A: If you know RPM, multiply by 2π/60 (or π/30) to get rad/s. For example, 3000 RPM = 3000 × π/30 ≈ 314 rad/s.

Q4: Why is power not constant across RPM?
A: Torque typically varies with RPM due to engine characteristics, causing power to peak at certain RPMs.

Q5: Does this account for transmission losses?
A: No, this calculates theoretical power at the motor. Actual wheel power is typically 10-20% less due to drivetrain losses.