1. What is the Torque Calculation Formula?

The torque calculation formula T = (HP × 5252) / RPM is used to determine the torque output of an electric motor based on its horsepower and rotational speed. This formula provides a direct relationship between power, speed, and torque in mechanical systems.

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 rotational power and torque, where 1 horsepower equals 550 foot-pounds per second, and there are 60 seconds in a minute (550 × 60 ÷ 2π ≈ 5252).

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for motor selection, mechanical design, and ensuring proper system performance. Torque determines the rotational force a motor can produce, which is essential for applications requiring specific force outputs.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 5252 used in the formula?
A: The constant 5252 comes from the conversion between horsepower (550 ft-lb/sec) and rotational speed (RPM), accounting for the relationship between linear and rotational motion.

Q2: What are typical torque values for electric motors?
A: Torque values vary significantly based on motor size and type, ranging from fractional lb-ft for small motors to thousands of lb-ft for large industrial motors.

Q3: How does torque relate to motor performance?
A: Torque determines the motor's ability to overcome resistance and perform work. Higher torque means better ability to handle heavy loads and accelerate quickly.

Q4: Can this formula be used for all types of motors?
A: This formula applies to any rotating mechanical system where horsepower and RPM are known, including electric motors, internal combustion engines, and other power transmission systems.

Q5: How does torque change with RPM in electric motors?
A: Different motor types have different torque-speed characteristics. Some motors provide constant torque across a speed range, while others may have torque that varies with speed.