1. What is the Torque Formula?

The torque formula calculates the rotational force produced by an electric motor. It relates horsepower (HP) and rotational speed (RPM) to determine the torque output in pound-feet (lb-ft).

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (lb-ft)
• \( HP \) — Horsepower
• \( RPM \) — Revolutions per minute
• 5252 — Conversion constant

Explanation: The constant 5252 comes from the relationship between horsepower, torque, and RPM, where 1 horsepower is defined as 550 foot-pounds per second.

3. Importance of Torque Calculation

Details: Torque calculation is essential for electric motor selection, performance analysis, and ensuring proper motor sizing for specific applications. It helps determine the motor's ability to overcome load resistance and maintain rotational motion.

4. Using the Calculator

Tips: Enter horsepower (HP) and RPM values. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 used in the torque formula?
A: 5252 is derived from the conversion between horsepower and torque, where 1 HP = 550 ft-lb/sec and there are 60 seconds in a minute (550 × 60 ÷ 2π ≈ 5252).

Q2: What is the relationship between torque and horsepower?
A: Horsepower is a function of torque and RPM. Higher torque at the same RPM results in higher horsepower, and vice versa.

Q3: How does torque affect electric motor performance?
A: Torque determines the motor's ability to start under load and maintain rotation. Higher torque motors can handle heavier loads and accelerate faster.

Q4: What are typical torque values for electric motors?
A: Torque values vary significantly based on motor size and type. Small motors may produce fractions of lb-ft, while large industrial motors can produce thousands of lb-ft.

Q5: Can this formula be used for all types of motors?
A: This formula is generally applicable for electric motors, but specific motor types (AC, DC, servo, etc.) may have additional factors to consider for precise torque calculations.