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 (N·m)
• \( P \) — Power (W)
• \( N \) — Rotational speed (RPM)
• \( \pi \) — Mathematical constant pi (≈ 3.14159)
• 60 — Conversion factor from minutes to seconds

Explanation: The formula converts power and rotational speed into torque, accounting for unit conversions between watts, RPM, and Newton-meters.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for proper motor sizing, ensuring adequate starting and running torque for specific applications, and preventing motor overload or underutilization.

4. Using the Calculator

Tips: Enter power in watts, rotational speed in RPM. Both values must be positive numbers. The calculator will compute the torque in Newton-meters.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between starting torque and running torque?
A: Starting torque is the torque required to start a motor from standstill, while running torque is the torque needed to maintain rotation under load.

Q2: How does torque relate to motor power?
A: Torque and power are directly related through rotational speed. Higher torque at the same speed means higher power output.

Q3: What factors affect motor torque?
A: Motor design, voltage, current, magnetic field strength, and load characteristics all influence the torque output.

Q4: Can I use this calculator for AC and DC motors?
A: Yes, this formula applies to both AC and DC electric motors when calculating theoretical torque from power and speed.

Q5: What are typical torque values for electric motors?
A: Torque values vary widely depending on motor size and application, ranging from fractional N·m for small motors to thousands of N·m for large industrial motors.