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Electric Motor Torque Formula:
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The electric motor torque formula calculates the torque 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 formula converts power in kilowatts and speed in revolutions per minute to torque in Newton-meters, accounting for the relationship between rotational power and torque.
Details: Accurate torque calculation is crucial for motor selection, mechanical design, and ensuring proper operation of machinery. It helps determine if a motor can provide sufficient rotational force for a specific application.
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 the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversions: 60,000/(2π) ≈ 9550, which converts power in kW and speed in rpm to torque in Nm.
Q2: What is a typical torque range for electric motors?
A: Torque varies greatly by motor size and type, ranging from less than 1 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 resistance and perform work. Higher torque means the motor can handle heavier loads or accelerate faster.
Q4: Can this formula be used for all types of electric motors?
A: This formula provides theoretical torque for most AC and DC motors at a given speed, but actual torque may vary due to efficiency losses and motor characteristics.
Q5: How does voltage affect motor torque?
A: For many motor types, torque is proportional to the square of the voltage. Higher voltage typically results in higher torque, within the motor's design limits.