1. What is 3-Phase Motor Torque?

Three-phase motor torque represents the rotational force produced by the motor. It is a crucial parameter in determining the motor's ability to perform work and drive mechanical loads.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( \tau \) — Torque (N·m)
• \( P \) — Power (kW)
• \( n \) — Speed (rpm)
• 9550 — Conversion constant

Explanation: The formula calculates the torque output of a three-phase AC motor based on its power rating and rotational speed.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required mechanical 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.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the constant 9550?
A: The constant 9550 is derived from unit conversion factors (60 seconds/minute ÷ 2π radians) and conversion from watts to kilowatts.

Q2: Can this formula be used for single-phase motors?
A: While the basic principle is similar, single-phase motors have different performance characteristics and may require additional factors for accurate torque calculation.

Q3: What affects motor torque output?
A: Torque output is affected by voltage, frequency, motor design, and load conditions. The calculated value represents theoretical maximum torque at rated conditions.

Q4: How does torque relate to motor performance?
A: Torque determines the motor's ability to start under load (starting torque) and maintain operation (full-load torque). Different applications require different torque characteristics.

Q5: What is the difference between rated torque and maximum torque?
A: Rated torque is the continuous torque the motor can produce without overheating, while maximum torque is the peak torque the motor can deliver for short periods without stalling.