1. What is Motor Torque?

Torque is a rotational force produced by an engine or motor. It represents how much twisting force is available at the motor shaft and is a crucial parameter in mechanical and electrical engineering applications.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

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

Explanation: The formula shows that torque is inversely proportional to speed when power is constant. Higher RPM means lower torque, and vice versa.

3. Importance of Torque Calculation

Details: Calculating torque is essential for selecting appropriate motors, designing mechanical systems, ensuring proper power transmission, and preventing mechanical failures.

4. Using the Calculator

Tips: Enter motor power in kW and rotational speed in RPM. Both values must be positive numbers (power > 0, RPM > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: 9550 is a conversion factor derived from unit conversions (1 kW = 1000 W, 1 minute = 60 seconds, and 2π radians per revolution).

Q2: What are typical torque values for electric motors?
A: Torque varies greatly by motor size and type. Small motors might produce 1-10 Nm, while large industrial motors can produce thousands of Nm.

Q3: How does torque relate to horsepower?
A: Horsepower is another measure of power (1 HP ≈ 0.746 kW). Torque and horsepower are related through RPM: HP = (Torque × RPM) / 5252.

Q4: What affects motor torque output?
A: Torque depends on motor design, power supply, load conditions, and temperature. Many motors have different torque characteristics at different speeds.

Q5: Can this formula be used for engines too?
A: Yes, the formula applies to any rotational power source including internal combustion engines, electric motors, and turbines.