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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 represents the motor's ability to perform work and is a crucial parameter in motor selection and application.
The calculator uses the torque formula:
Where:
Explanation: The constant 9550 is derived from unit conversion factors to calculate torque in Newton-meters when power is in kilowatts and speed is in RPM.
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 electric motor power.
Tips: Enter power in kilowatts and speed in RPM. Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversion: 9550 = 60 × 1000 / (2π), which converts power from kW to watts, time from minutes to seconds, and rotational speed to angular velocity.
Q2: What are typical torque values for electric motors?
A: Torque values vary significantly based on motor size and type, ranging from less than 1 Nm for small motors to several thousand Nm for large industrial motors.
Q3: How does torque relate to motor performance?
A: Torque determines a motor's ability to start under load, accelerate, and maintain operation against resistance. Higher torque generally means better performance under heavy loads.
Q4: Can this formula be used for all types of electric motors?
A: This formula provides theoretical torque calculation for most electric motors, but actual torque may vary due to efficiency losses, motor design, and operating conditions.
Q5: How does torque change with motor speed?
A: For constant power applications, torque decreases as speed increases. Different motor types (AC, DC, induction) have different torque-speed characteristics.