1. What Is The Torque Formula?

The torque formula calculates the rotational force produced by an electric motor. Torque is a crucial parameter in determining a motor's ability to perform work and is measured in pound-feet (lb-ft) in the imperial system.

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 (derived from the relationship between horsepower, torque, and RPM)

Explanation: This formula shows the inverse relationship between torque and RPM for a given horsepower. The constant 5252 comes from the fact that 1 horsepower is defined as 550 foot-pounds per second, and there are 2π radians in a revolution.

3. Importance Of Torque Calculation

Details: Accurate torque calculation is essential for motor selection, mechanical system design, and ensuring proper performance in applications ranging from industrial machinery to automotive systems.

4. Using The Calculator

Tips: Enter horsepower and RPM values. Both values must be positive numbers. The calculator will compute the torque in pound-feet (lb-ft).

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 used in the torque formula?
A: 5252 is a conversion constant derived from the definition of horsepower (1 HP = 550 ft-lb/s) and the relationship between rotational speed and linear measurement (1 revolution = 2π radians).

Q2: What's the difference between torque and horsepower?
A: Torque is a measure of rotational force, while horsepower is a measure of power (work done over time). Horsepower = (Torque × RPM) / 5252.

Q3: How does torque affect motor performance?
A: Torque determines a motor's ability to overcome resistance and accelerate loads. Higher torque means better starting capability and ability to handle heavy loads.

Q4: Do electric motors have constant torque?
A: AC induction motors typically have variable torque characteristics, while DC motors can maintain more constant torque across speed ranges, depending on their design.

Q5: How is torque measured in practice?
A: Torque can be measured directly using torque sensors or dynamometers, or calculated indirectly using electrical measurements and motor efficiency data.