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 specific 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 constant (derived from unit conversions)

Explanation: The formula relates power, speed and torque, showing that for a given power, torque decreases as speed increases.

3. Importance of Torque Calculation

Details: Accurate torque calculation ensures proper motor sizing, prevents overloading, optimizes energy efficiency, and extends equipment life.

4. Using the Calculator

Tips: Enter power in kW and RPM. Both values must be positive (power > 0, RPM ≥ 1). The calculator will compute the torque in Newton-meters (Nm).

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: It's a conversion constant derived from unit conversions (60,000/2π) to convert kW to W and minutes to seconds.

Q2: What if my power is in horsepower (HP)?
A: First convert HP to kW (1 HP = 0.7457 kW) before using the calculator.

Q3: How does torque relate to motor selection?
A: The motor must produce enough torque to overcome the load's resistance while maintaining the required speed.

Q4: What's typical torque range for industrial motors?
A: Varies widely - small motors might produce 1-10 Nm, while large industrial motors can produce thousands of Nm.

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