1. What is Torque Calculation?

Torque calculation is essential for proper motor selection in mechanical systems. It determines the rotational force a motor needs to produce to drive a load at a specified speed.

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 factor combining unit conversions and constants

Explanation: The formula converts power and speed into rotational force (torque) needed for proper motor sizing.

3. Importance of Torque Calculation

Details: Accurate torque calculation ensures the selected motor can handle the load requirements without being oversized (wasting energy) or undersized (causing failure).

4. Using the Calculator

Tips: Enter power in kW and RPM in revolutions per minute. All values must be valid (power > 0, RPM > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: 9550 combines the conversion factors between kW, N·m, and RPM (60,000/2π ≈ 9550).

Q2: What are typical torque values for motors?
A: Torque varies greatly by motor size and application, from fractional N·m for small motors to thousands of N·m for large industrial motors.

Q3: How does torque relate to motor power?
A: Power is the product of torque and speed (P = T × ω). At constant power, torque increases as speed decreases.

Q4: What if my motor has variable speed?
A: Calculate torque at the minimum operating speed, as this is when torque demand is highest.

Q5: Should I add a safety factor?
A: Yes, typically 15-25% additional torque capacity is recommended to account for startup conditions and load variations.