Home
Back
Motor Torque Formula:
| From: | To: |
Motor torque calculation determines the rotational force produced by an electric motor based on its power output and rotational speed. It's essential for proper motor selection and mechanical system design.
The calculator uses the torque formula:
Where:
Explanation: The formula converts power and speed into torque, accounting for the relationship between rotational force, power output, and angular velocity.
Details: Accurate torque calculation is crucial for motor selection, mechanical design, ensuring proper system performance, and preventing mechanical failures due to insufficient torque.
Tips: Enter power in kilowatts (kW) and rotational speed in revolutions per minute (rpm). Both values must be positive numbers greater than zero.
Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversions (60 seconds/minute × 1000 watts/kilowatt ÷ 2π radians/revolution) to convert between kW, rpm, and Nm.
Q2: What are typical torque values for electric motors?
A: Torque values vary widely based 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 overcome load resistance. Higher torque allows motors to drive heavier loads or accelerate faster.
Q4: Can this formula be used for all motor types?
A: This formula applies to various motor types (AC, DC, induction) when calculating output torque based on mechanical power and speed.
Q5: How does torque change with motor speed?
A: For constant power applications, torque decreases as speed increases, following the inverse relationship shown in the formula.