1. What is Motor Rated Power?

Motor rated power is the mechanical output power that a motor can produce continuously without exceeding its thermal limits. It's a crucial parameter for motor selection and system design.

2. How Does the Calculator Work?

The calculator uses the motor power formula:

Where:

• \( P \) — Power in kilowatts (kW)
• \( T \) — Torque in Newton-meters (Nm)
• \( \omega \) — Rotational speed in revolutions per minute (RPM)
• 9550 — Conversion factor (derived from 60,000/2π)

Explanation: The formula converts the product of torque and speed into power units, accounting for the conversion between radians and revolutions.

3. Importance of Power Calculation

Details: Proper motor sizing ensures efficient operation, prevents overheating, and matches the mechanical load requirements. Undersized motors may fail prematurely, while oversized motors are inefficient and costly.

4. Using the Calculator

Tips: Enter torque in Nm and rotational speed in RPM. Both values must be positive numbers. The result will be the mechanical power output in kilowatts (kW).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between input and output power?
A: Output power is mechanical power at the shaft. Input power is electrical power consumed, which is higher due to efficiency losses.

Q2: How does speed affect motor power?
A: For constant torque applications, power increases linearly with speed. However, motors often have a constant power range at higher speeds.

Q3: What are typical torque values for motors?
A: Torque varies greatly by motor size. Small motors may produce 1-10 Nm, while large industrial motors can produce thousands of Nm.

Q4: Can I use this for AC and DC motors?
A: Yes, the formula applies to all motor types as it calculates mechanical power output regardless of electrical design.

Q5: How do I account for motor efficiency?
A: Divide the calculated mechanical power by the motor's efficiency (typically 0.8-0.95) to determine required electrical input power.