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Electric Motor Torque Formula:
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The electric motor torque formula calculates the rotational force produced by an electric motor based on its power output and rotational speed. This is essential for understanding motor performance and selecting appropriate motors for specific applications.
The calculator uses the torque formula:
Where:
Explanation: The constant 9550 is derived from unit conversions between kilowatts, Newton-meters, and revolutions per minute, providing accurate torque calculations for electric motors.
Details: Accurate torque calculation is crucial for motor selection, mechanical design, and ensuring proper operation of motor-driven systems across various industrial applications.
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 conversion factors (60 seconds/minute × 1000 watts/kilowatt) divided by (2π radians/revolution) to convert between power, speed, and torque units.
Q2: What are typical torque values for electric motors?
A: Torque values vary significantly 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 a motor's ability to overcome load resistance and accelerate rotating masses, directly affecting the motor's operational capabilities.
Q4: Are there limitations to this formula?
A: This formula provides theoretical maximum torque and assumes 100% efficiency. Actual torque may vary due to efficiency losses, power factor, and motor design characteristics.
Q5: Can this formula be used for all types of electric motors?
A: While the basic relationship applies to all rotary motors, specific motor types (AC, DC, synchronous, asynchronous) may have additional torque characteristics that affect performance.