Electric Motor Torque Calculator

Electric Motor Torque Formula:

\[ T = \frac{P \times 9550}{N} \]

Torque (T):

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1. What is Electric Motor Torque?

Electric motor torque is the rotational force produced by an electric motor. It represents the motor's ability to perform work and is a crucial parameter in motor selection and application design.

2. How Does the Calculator Work?

The calculator uses the torque formula:

\[ T = \frac{P \times 9550}{N} \]

Where:

\( T \) — Torque (Newton-meters)
\( P \) — Power (kilowatts)
\( N \) — Rotational speed (revolutions per minute)
9550 — Conversion constant (derived from unit conversions)

Explanation: The formula calculates the torque output of an electric motor based on its power rating and rotational speed.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required load, and for designing mechanical systems that rely on motor performance.

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.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversion factors (60 seconds/minute ÷ 2π radians/revolution × 1000 watts/kilowatt).

Q2: What are typical torque values for electric motors?
A: Torque values vary widely depending on motor size and type, ranging from fractional Nm for small motors to thousands of Nm for large industrial motors.

Q3: How does torque relate to motor performance?
A: Torque determines the motor's ability to accelerate loads and overcome resistance. Higher torque means better starting and overload capability.

Q4: Can this formula be used for all types of electric motors?
A: This formula provides theoretical torque based on power and speed, but actual torque may vary due to motor efficiency, design, and operating conditions.

Q5: What's the difference between rated torque and maximum torque?
A: Rated torque is the continuous torque the motor can produce without overheating, while maximum torque is the peak torque the motor can deliver for short periods.