1. What is Motor Output Power?

Motor output power is the mechanical power delivered by a motor, calculated as the product of torque and angular speed. It represents the actual work the motor can perform and is typically measured in watts (W).

2. How Does the Calculator Work?

The calculator uses the motor power equation:

Where:

• \( P_{out} \) — Output power (W)
• \( T \) — Torque (Nm)
• \( \omega \) — Angular speed (rad/s)

Explanation: This fundamental equation shows that power increases linearly with both torque and rotational speed. The relationship is direct - doubling either torque or speed doubles the power output.

3. Importance of Motor Power Calculation

Details: Calculating motor output power is essential for:

• Selecting the right motor for an application
• Determining system efficiency
• Sizing power supplies and controllers
• Predicting performance under load
• Comparing different motor options

4. Using the Calculator

Tips:

• Enter torque in newton-meters (Nm)
• Enter angular speed in radians per second (rad/s)
• For RPM to rad/s conversion: multiply RPM by 0.10472
• All values must be positive numbers

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between input and output power?
A: Input power is electrical power consumed (voltage × current), while output power is mechanical power delivered. The ratio is the motor's efficiency.

Q2: How do I convert RPM to rad/s?
A: Multiply RPM by π/30 (≈0.10472). Example: 1000 RPM = 1000 × 0.10472 = 104.72 rad/s.

Q3: What are typical torque values for small motors?
A: Small DC motors might produce 0.01-0.1 Nm, while larger industrial motors can produce hundreds of Nm.

Q4: Why is power sometimes given in horsepower?
A: In some industries, horsepower (1 hp ≈ 746 W) is still commonly used, especially for larger motors.

Q5: How does power relate to motor size?
A: Generally, higher power requires larger motors, but advanced materials and designs can increase power density.