1. What is Motor Torque?

Torque is a rotational force produced by an electric motor. It's a crucial parameter that determines the motor's ability to perform work and overcome resistance. The torque output affects how quickly a motor can accelerate a load.

2. How Does the Calculator Work?

The calculator uses the motor torque equation:

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 equation shows that torque is inversely proportional to speed when power is constant. The constant 9550 comes from the conversion of units (kW to W, minutes to seconds) and the relationship between rotational speed and angular velocity.

3. Importance of Torque Calculation

Details: Calculating motor torque is essential for selecting the right motor for an application, ensuring it can provide enough force to move the load without stalling or overheating. It's also important for system design and safety considerations.

4. Using the Calculator

Tips: Enter the motor power in kilowatts and the rotational speed in RPM. Both values must be positive numbers. The calculator will compute the torque in Newton-meters.

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: 9550 is a conversion factor derived from unit conversions (1 kW = 1000 W, 1 minute = 60 seconds) and the relationship between rotational speed and angular velocity (ω = 2πN/60).

Q2: What's the difference between torque and power?
A: Torque is a rotational force, while power is the rate at which work is done. Power takes into account both torque and speed (Power = Torque × Angular Velocity).

Q3: How does torque relate to motor performance?
A: Torque determines a motor's ability to start and accelerate a load. High torque at low speeds is important for applications requiring high starting forces.

Q4: What affects motor torque output?
A: Torque depends on motor design, electrical characteristics, supply voltage, and in AC motors, the frequency of the power supply.

Q5: Can this formula be used for all motor types?
A: This formula gives theoretical torque based on power and speed. Actual torque may vary due to efficiency losses, motor type (DC, AC induction, etc.), and operating conditions.