1. What is Torque in Electric Motors?

Torque is the rotational force produced by an electric motor. It determines the motor's ability to perform work and is crucial for applications requiring rotational motion under load.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( Torque \) — Rotational force (N·m)
• \( P \) — Power (kW)
• \( RPM \) — Revolutions per minute
• 9550 — Conversion factor combining unit conversions and constants

Explanation: The formula relates the motor's power output to its rotational speed, showing that torque decreases as RPM increases for a given power.

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 without stalling or overheating.

4. Using the Calculator

Tips: Enter power in kilowatts (kW) and RPM (revolutions per minute). Both values must be positive numbers (power > 0, RPM ≥ 1).

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: It's a conversion factor that combines 60 (seconds to minutes), 1000 (watts to kW), and 2π (radians conversion), simplified to 9550.

Q2: What's the difference between starting torque and running torque?
A: Starting torque is the torque when the motor begins rotating (often higher), while running torque is during normal operation.

Q3: How does voltage affect torque?
A: For AC induction motors, torque is proportional to voltage squared. Lower voltage significantly reduces available torque.

Q4: What is the relationship between torque and horsepower?
A: Horsepower = (Torque × RPM)/5252 (in US units). They're related through rotational speed.

Q5: How do I increase motor torque?
A: Options include using a gear reducer, selecting a motor with higher torque characteristics, or increasing power input (within motor limits).