1. What is Motor Torque?

Motor torque is the rotational force produced by an electric motor. It represents the motor's ability to perform work and is a crucial parameter in mechanical engineering and motor selection.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (Newton-meters)
• \( P \) — Power (kilowatts)
• \( N \) — Rotational speed (revolutions per minute)
• 9550 — Conversion constant (derived from unit conversions)

Explanation: The formula calculates the torque output of a motor based on its power rating and rotational speed, with the constant 9550 accounting for unit conversions between kW, rpm, and Nm.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required load, preventing overload conditions, and optimizing energy efficiency in mechanical systems.

4. Using the Calculator

Tips: Enter power in kilowatts (kW) and rotational speed in revolutions per minute (rpm). Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversions: 1 kW = 1000 W, 1 minute = 60 seconds, and the relationship between power, torque, and angular velocity (P = T × ω).

Q2: What are typical torque values for electric motors?
A: Torque values vary widely depending on motor size and type. Small motors may produce 1-10 Nm, while large industrial motors can produce thousands of Nm.

Q3: How does torque relate to motor performance?
A: Torque determines a motor's ability to start under load, accelerate, and maintain operation. Higher torque allows motors to handle heavier loads and overcome resistance.

Q4: Can this formula be used for all types of motors?
A: This formula applies to most electric motors when operating at constant speed. For variable speed applications or special motor types, additional factors may need consideration.

Q5: How does torque affect motor selection?
A: The required torque determines the motor size and type. Applications with high starting torque needs (like conveyors or crushers) require motors designed for high torque output.