1. What is AC Motor Torque?

Torque is the rotational force produced by an AC motor. It represents the motor's ability to perform work and is a critical 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 when power is in kilowatts and speed is in revolutions per minute.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required load without stalling or overheating.

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.

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: The constant 9550 comes from the conversion factors: 60,000/(2π) ≈ 9550, which converts units from kW and rpm to Nm.

Q2: What is typical torque range for AC motors?
A: Torque varies significantly by motor size and type, ranging from less than 1 Nm for small motors to thousands of Nm for large industrial motors.

Q3: How does torque relate to motor performance?
A: Torque determines a motor's ability to start under load, accelerate, and maintain operation against resisting forces.

Q4: What affects motor torque output?
A: Voltage, frequency, motor design, and load characteristics all influence the actual torque produced by an AC motor.

Q5: Can this formula be used for DC motors?
A: While the basic relationship is similar, DC motor torque calculation uses different constants and considerations.