1. What Is Electric Motor Torque?

Electric motor torque is the rotational force produced by an electric motor. It's a crucial parameter that determines the motor's ability to perform work and overcome resistance. Torque is measured in Newton-meters (Nm) and varies with motor speed and power.

2. How Does The Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (Nm)
• \( P \) — Power (kW)
• \( N \) — Rotational speed (rpm)

Explanation: The constant 9550 is derived from unit conversions that relate power in kilowatts, torque in Newton-meters, and rotational speed in revolutions per minute.

3. Importance Of Torque Calculation

Details: Accurate torque calculation is essential for selecting appropriate motors for specific applications, ensuring proper performance, preventing overload conditions, and optimizing energy efficiency in mechanical systems.

4. Using The Calculator

Tips: Enter power in kilowatts (kW) and rotational speed in revolutions per minute (rpm). Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversion factors that relate power (kW), torque (Nm), and rotational speed (rpm). It's derived from 60,000/(2π) rounded to 9550 for practical calculations.

Q2: What is the relationship between torque and motor speed?
A: For a given power, torque is inversely proportional to speed. As motor speed increases, torque decreases, and vice versa, when power remains constant.

Q3: How does torque affect motor selection?
A: Different applications require different torque characteristics. High-torque motors are needed for applications requiring high starting force or operation under heavy loads, while constant-torque applications require motors that maintain torque across speed ranges.

Q4: Can this formula be used for all types of electric motors?
A: This formula provides theoretical torque values for electric motors generally, but actual torque may vary based on motor type (AC, DC, induction, synchronous), efficiency, and operating conditions.

Q5: What are typical torque values for industrial motors?
A: Torque values vary widely based on motor size and application. Small motors might produce less than 1 Nm, while large industrial motors can produce thousands of Nm. Always consult motor specifications for accurate values.