1. What is Motor Torque?

Torque is a rotational force that causes an object to rotate about an axis. In motors, it's the twisting force that the motor generates to turn its shaft. Torque is a crucial parameter in motor selection and mechanical design.

2. How Does the Calculator Work?

The calculator uses the motor torque formula:

Where:

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

Explanation: The formula shows that torque is inversely proportional to speed when power is constant. Higher RPM means lower torque for the same power output.

3. Importance of Torque Calculation

Details: Knowing the torque is essential for selecting the right motor for an application, designing mechanical systems, and ensuring proper operation under load conditions.

4. Using the Calculator

Tips: Enter motor power in kW and rotational speed in 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 combines several conversion factors (60,000/2π) to convert between kW, RPM, and Nm while accounting for units and radians.

Q2: What is 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 or gear reduction systems to multiply torque at the expense of speed.

Q4: What affects motor torque output?
A: Voltage, current, motor design, temperature, and load conditions all affect actual torque output.

Q5: Can I use this for electric and combustion engines?
A: Yes, the formula applies to any rotating machine, though combustion engines typically have torque curves that vary with RPM.