1. What is Electric Motor Torque?

Electric 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 motor selection and application design.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (Nm)
• \( P \) — Power (kW)
• \( N \) — Speed (rpm)

Explanation: The constant 9550 is derived from unit conversion factors to calculate torque in Newton-meters from power in kilowatts and speed in revolutions per minute.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for proper motor sizing, ensuring the motor can handle the required load, and preventing motor overload or inefficient operation.

4. Using the Calculator

Tips: Enter power in kilowatts (kW) and 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 9550 used in the formula?
A: The constant 9550 comes from unit conversion: 60,000/(2π) ≈ 9550, which converts power from kW to Nm/rpm.

Q2: What is a typical torque range for electric motors?
A: Torque varies significantly based on motor size and type, ranging from fractional Nm for small motors to thousands of Nm for large industrial motors.

Q3: How does torque relate to motor performance?
A: Torque determines the motor's ability to start under load, accelerate, and maintain operation against resistance. Higher torque means better load-handling capability.

Q4: Are there different types of torque?
A: Yes, including starting torque, breakdown torque, and full-load torque. This calculator provides the full-load torque based on rated power and speed.

Q5: Can this formula be used for all motor types?
A: This formula applies to various AC and DC motors operating at their rated conditions, but specific motor characteristics may affect actual torque output.