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Electric Motor Torque Formula:
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Electric motor torque is the rotational force produced by an electric motor. It determines the motor's ability to perform work and overcome resistance. Torque is a crucial parameter in motor selection for various applications.
The calculator uses the torque formula:
Where:
Explanation: The formula calculates the torque output based on the motor's power and rotational speed, with 9550 being the conversion factor that accounts for unit transformations.
Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required load, prevent stalling, and operate efficiently in various industrial and mechanical applications.
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.
Q1: Why is 9550 used in the formula?
A: 9550 is a conversion constant derived from unit conversions (60 seconds/minute × 1000 watts/kilowatt ÷ 2π radians/revolution).
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 the motor's ability to start under load, accelerate, and maintain operation against resistance. Higher torque means better load-handling capability.
Q4: Can this formula be used for all motor types?
A: This formula provides theoretical torque calculation for various AC and DC motors, but actual torque may vary due to efficiency losses and motor characteristics.
Q5: How does speed affect torque in electric motors?
A: For a given power, torque decreases as speed increases. This inverse relationship is fundamental to electric motor operation.