1. What is Torque?

Torque is a measure of the rotational force produced by a motor. It represents how much force the motor can apply to rotate an object around an axis. Torque is typically measured in Newton-meters (N·m) in the metric system.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( P \) — Power in kilowatts (kW)
• \( RPM \) — Rotational speed in revolutions per minute
• 9550 — Conversion factor (derived from unit conversions)

Explanation: The formula relates power and rotational speed to torque. The constant 9550 comes from converting units (60 seconds/minute × 1000 watts/kilowatt) divided by 2π radians/revolution.

3. Importance of Torque Calculation

Details: Calculating torque is essential for motor selection, mechanical design, and ensuring proper operation of machinery. It helps determine if a motor can handle the required load.

4. Using the Calculator

Tips: Enter power in kilowatts and rotational speed in RPM. Both values must be positive numbers. The calculator will compute the torque in Newton-meters.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between torque and power?
A: Power is the rate of doing work, while torque is the rotational force. Power = Torque × Angular Velocity.

Q2: Why is 9550 used in the formula?
A: It's a conversion factor that comes from 60,000 (seconds to minutes and watts to kW) divided by 2π (radians in a revolution).

Q3: How does torque relate to motor size?
A: Generally, larger motors produce more torque, but gearing can also increase torque at the expense of speed.

Q4: What affects a motor's torque output?
A: Voltage, current, motor design, temperature, and load conditions all affect torque output.

Q5: What's the difference between starting torque and running torque?
A: Starting torque is the torque when the motor begins turning from rest, often higher than running torque at full speed.