1. What is Electric Motor Torque?

Torque is the rotational force produced by an electric motor. It's a crucial parameter that determines the motor's ability to perform work and overcome resistance to rotation.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque in Newton-meters (Nm)
• \( P \) — Power in kilowatts (kW)
• \( N \) — Rotational speed in revolutions per minute (RPM)
• 9550 — Conversion factor combining unit conversions and constants

Explanation: The formula relates the motor's power output to its rotational speed, showing that torque decreases as speed increases for a given power.

3. Importance of Torque Calculation

Details: Calculating torque is essential for selecting the right motor for an application, ensuring it can provide enough rotational force to drive the load without stalling or overheating.

4. Using the Calculator

Tips: Enter power in kW and speed in RPM. Both values must be positive numbers. The calculator will compute the torque in Nm.

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: 9550 combines the conversion factors from kW to W (1000), minutes to seconds (60), and radians to revolutions (2π) into one constant (60000/2π ≈ 9550).

Q2: What's the difference between starting torque and running torque?
A: Starting torque is the torque when the motor begins rotating from standstill, typically higher than running torque which is the torque during normal operation.

Q3: How does voltage affect torque?
A: For AC induction motors, torque is proportional to the square of the voltage. Lower voltage results in significantly reduced torque.

Q4: What is the relationship between torque and horsepower?
A: Horsepower is a measure of power that combines torque and speed (HP = Torque × RPM / 5252 for lb-ft units).

Q5: How can I increase motor torque?
A: Options include using a gear reducer, selecting a motor with higher torque characteristics, or increasing power input (within motor ratings).