1. What is the Torque Calculation Formula?

The torque calculation formula estimates the rotational force produced by an electric motor based on its power output and rotational speed (RPM). This is essential for motor selection and mechanical system design.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

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

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

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for selecting appropriate motors, designing mechanical systems, and ensuring proper operation of machinery without overloading components.

4. Using the Calculator

Tips: Enter power in kW and RPM in revolutions per minute. Both values must be positive numbers (RPM must be greater than 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: 9550 is a conversion factor that accounts for the units (kW to watts and minutes to seconds) in the calculation.

Q2: Can I use horsepower instead of kW?
A: Yes, but you'll need to use a different conversion factor (5252 instead of 9550) if using horsepower.

Q3: What is the relationship between torque and RPM?
A: For a given power, torque decreases as RPM increases. This is why high-torque applications often use gear reducers.

Q4: Does this formula work for all motor types?
A: This formula works for electric motors in general, but actual torque may vary slightly due to efficiency factors and motor design.

Q5: How does torque affect motor selection?
A: The required torque determines the motor size and type needed to overcome starting and running loads in your application.