1. What is Torque Calculation for Motor?

Definition: This calculator determines the torque produced by an electric motor based on its horsepower and rotational speed (RPM).

Purpose: It helps engineers and technicians understand motor performance characteristics for proper equipment selection and mechanical design.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Torque (pound-feet)
• \( HP \) — Horsepower
• \( RPM \) — Revolutions per minute
• 5252 — Conversion constant (derived from the relationship between rotational speed and torque)

Explanation: The formula shows that torque is inversely proportional to speed when power is constant.

3. Importance of Torque Calculation

Details: Knowing motor torque is essential for sizing couplings, gearboxes, and other mechanical components in power transmission systems.

4. Using the Calculator

Tips: Enter the motor's horsepower rating and operating RPM. Both values must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 5252 used?
A: 5252 is the RPM at which horsepower and torque values are equal (when using lb-ft units), derived from the conversion between rotational and linear power.

Q2: What's typical torque for standard motors?
A: Torque varies greatly by motor size and type, but common industrial motors might produce 50-500 lb-ft depending on HP and RPM.

Q3: How does torque relate to motor performance?
A: Torque determines a motor's ability to do work (overcome resistance) at a given speed. Higher torque means greater force output.

Q4: What if my motor has variable RPM?
A: For variable speed motors, calculate torque at different operating points as torque changes with speed.

Q5: Can I use this for electric vehicles?
A: Yes, the formula applies to any rotational power system, though EV motors often specify torque directly.