1. What is Motor Shaft Torque?

Torque is a rotational force that causes an object to rotate about an axis. In motors, it represents the twisting force that the motor shaft can generate to drive a load.

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 for a given power. Higher RPM means lower torque, and vice versa.

3. Importance of Torque Calculation

Details: Knowing the torque is essential for selecting motors, designing mechanical systems, and ensuring proper operation of machinery without overloading components.

4. Using the Calculator

Tips: Enter power in kW and RPM (must be greater than 0). 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 that comes from unit conversions (1 kW = 1000 W, 1 minute = 60 seconds, and 1 Nm/s = 1 W).

Q2: What are typical torque values for motors?
A: Torque varies greatly by motor size and application. Small motors might produce fractions of a Nm, while large industrial motors can produce thousands of Nm.

Q3: How does torque relate to horsepower?
A: Horsepower is another measure of power. The formula can be adapted for horsepower (HP) by using 5252 instead of 9550.

Q4: What if I have power in horsepower instead of kW?
A: First convert horsepower to kW (1 HP ≈ 0.7457 kW) or use the formula: Torque = (HP × 5252) / RPM.

Q5: Does this formula work for all types of motors?
A: The formula is generally valid for all rotating machinery, but actual torque may vary with motor type, efficiency, and operating conditions.