Calculate Torque Electric Motor

Torque Formula:

\[ T = \frac{HP \times 5252}{RPM} \]

Torque (T):

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1. What is the Torque Calculation Formula?

The torque calculation formula T = (HP × 5252) / RPM is used to calculate the torque output of electric motors and engines. This formula provides the relationship between horsepower, rotational speed, and torque output.

2. How Does the Calculator Work?

The calculator uses the torque formula:

\[ T = \frac{HP \times 5252}{RPM} \]

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.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for electric motor selection, performance analysis, mechanical design, and ensuring proper operation of motor-driven systems.

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 5252 used in the torque formula?
A: 5252 is derived from the conversion between horsepower (550 ft-lb/sec) and RPM (revolutions per minute) with unit conversions.

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 a motor's ability to overcome resistance and perform work. Higher torque allows motors to handle heavier loads and accelerate faster.

Q4: Can this formula be used for all types of motors?
A: This formula works for any rotating machinery where horsepower and RPM are known, including electric motors, internal combustion engines, and turbines.

Q5: How does torque change with RPM in electric motors?
A: Different motor types have different torque characteristics. AC induction motors typically have high starting torque, while DC motors often provide constant torque across their speed range.