1. What is Motor Torque?

Torque is a rotational force produced by an electric motor. It represents the motor's ability to perform work and is typically measured in Newton-meters (Nm). Understanding torque is essential for proper motor selection and application.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (Nm)
• \( P \) — Power (kW)
• \( N \) — Speed (RPM)
• 9550 — Conversion factor (derived from unit conversions)

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

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for selecting the right motor for an application, ensuring proper performance, and preventing mechanical failures or inefficiencies.

4. Using the Calculator

Tips: Enter power in kilowatts (kW) and speed in revolutions per minute (RPM). Both values must be positive numbers. The calculator will compute the torque in Newton-meters (Nm).

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: 9550 is the conversion factor derived from unit conversions (1 kW = 1000 W, 1 RPM = 2π/60 rad/s).

Q2: 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.

Q3: How does torque relate to motor size?
A: Generally, higher torque requires larger motors, but gearboxes can increase torque while reducing speed.

Q4: What affects motor torque?
A: Voltage, current, motor design, and magnetic field strength all influence torque output.

Q5: Can I use this for hydraulic motors?
A: The same formula applies, but ensure units are consistent (power in kW, speed in RPM).