1. What is Electric Motor Torque?

Torque is the rotational force produced by an electric motor. It's a crucial parameter in motor selection and mechanical system design, determining the motor's ability to perform work and overcome load resistance.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( Power \) — Motor power in kilowatts (kW)
• \( RPM \) — Rotational speed in revolutions per minute
• \( 9550 \) — Conversion factor combining various unit conversions

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

3. Importance of Torque Calculation

Details: Proper torque calculation ensures the motor can handle the required mechanical load without stalling or overheating. It's essential for selecting appropriate motors for applications like pumps, conveyors, or machine tools.

4. Using the Calculator

Tips: Enter motor power in kW and rotational speed in RPM. Both values must be positive numbers (power > 0, RPM > 0).

5. Frequently Asked Questions (FAQ)

Q1: What if my power is in horsepower (HP)?
A: First convert HP to kW (1 HP ≈ 0.746 kW) before using the calculator.

Q2: Why is the conversion factor 9550?
A: It combines unit conversions: 60 (seconds/minute) / 2π (radians/revolution) × 1000 (W/kW) ≈ 9550.

Q3: Does this work for all motor types?
A: The formula works for any rotating machinery, but actual motor torque varies with type (induction, DC, etc.) and operating conditions.

Q4: What's typical torque for standard motors?
A: Small motors (1 kW) might produce 3-10 Nm, while large industrial motors can produce thousands of Nm.

Q5: How does torque relate to motor size?
A: Generally, higher torque requires larger motors, but gearboxes can increase torque while reducing speed.