1. What is Motor Torque?

Torque is a measure of the rotational force produced by a motor. It represents how much load the motor can handle and is crucial for determining a motor's performance characteristics.

2. How Does the Calculator Work?

The calculator uses the standard torque formula:

Where:

• \( Power \) — Motor power in kilowatts (kW)
• \( RPM \) — Rotational speed in revolutions per minute
• \( 9550 \) — Conversion constant (derived from unit conversions)

Explanation: The formula shows that torque is inversely proportional to RPM when power is constant. Higher RPM means lower torque, and vice versa.

3. Importance of Torque Calculation

Details: Knowing a motor's torque is essential for proper motor selection, ensuring it can handle the required mechanical load and operate efficiently.

4. Using the Calculator

Tips: Enter the motor's rated power in kW and its operating RPM. Both values must be positive numbers (RPM must be greater than 0).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between torque and power?
A: Power is the rate of doing work, while torque is the rotational force. Power = Torque × Angular Velocity.

Q2: Why is 9550 used in the formula?
A: It's a conversion constant derived from unit conversions: (60 sec/min × 1000 W/kW) / (2π rad/rev) ≈ 9550.

Q3: How does torque relate to motor size?
A: Generally, higher torque motors are physically larger as they need more magnetic material to generate greater forces.

Q4: What affects a motor's torque output?
A: Voltage, current, motor design, magnetic materials, and cooling all affect torque capability.

Q5: What's the difference between starting and running torque?
A: Starting torque is the torque when the motor begins turning from rest, often higher than running torque.