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    Motor Torque Calculator: Calculate Torque from Power & Speed

    Created by Md jony islam

    torque calculation from power and rpm

    Compute motor torque simply by entering power and rotation speed. Allows you to use metric and imperial scale units in order to provide proper mechanical and electrical torque calculations. It is a fast calculator to compute motor torque based on its power and speed in RPM. Using typical formulas, it gives correct torque values in Newton-meters (Nm) or pound-feet (lb-ft) according to the units used. The overall torque level plays an essential role in the design and usage of motor components, which affects how the machine loads and the efficiency of the machine. The calculator is necessary to make sure that motors are properly sized according to what people want to achieve through automation, HVAC, manufacturing, and electric vehicles.

    torque calculation in Nm

    Motor Torque Calculator
    Nm

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    What do you need to know to calculate Motor Torque?

    Motor Torque Calculator assists you in figuring out the torque that a motor generates with respect to the power and the rotational speed (RPM). This plays a critical role among the engineers, technicians, as well as students of the mechanical or electrical disciplines. Torque: The amount of force to rotate an object is referred to as torque, and this plays an important role in the design of systems that operate using motors, including conveyors, pumps, fans, etc.

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    Conversion using the electric motor torque Calculation Formula

    This calculator operates with both the metric units (Watts, Nm) and the imperial ones (HP, lb-ft). All you do is the power rating and RPM, and the value of torque comes out immediately using the standard formulas:

    01. For metric units:

    Torque (Nm) = (Power (W) × 60) / (2 × π × RPM)

    02. For imperial units:

    Torque (lb-ft) = (HP × 5252) / RPM

    Suggested Reading

    Frequently Asked Questions - AC Motor Torque Conversion FAQs:

    How do you calculate torque in an AC motor?

    Mark is derived by torque in an AC motor, which is calculated from the formula: Torque (Nm) = (9550 × Power in KiloWatt) divided by RPM. This equation relates mechanical power output and rotational speed, and 9550 is a constant that we acquire from unit conversion. The correct value is obtained if you always ensure the motor is running at rated RPM.

    What is the torque of a 1.5 kW AC motor?

    And, the torque of a 1.5 kW AC motor turning at 1440 RPM (normal for a 4-pole motor) is: (9550 × 1.5) ÷ 1440 ≈ 9.95 Nm. The Torque, while not exact, is predictable to a degree for a given motor load and efficiency, but this is a good nominal value.

    Why does motor RPM affect torque?

    Motor RPM is also inversely proportional to torque for a particular power. As speed increases, torque decreases. Because torque is a rotational force, slower motors can provide greater torque at the same power level, which is critical for applications that need force over speed.

    What factors impact AC motor torque output?

    Torque in an AC motor is dependent on power, RPM, efficiency, voltage supply, and load. Dirty lubrication or low voltage, or high load can reduce effective torque. Also, motor design concerning several poles, rotor type, and control method in terms of direct-on-line vs. VFD can affect stability and characteristics of torque.

    What is the unit of torque in AC motors?

    The technical term for measures of turning force is Newton-meter (Nm). It measures the motor shaft twist force that is delivered. Imperial systems make use of pound-feet (lb-ft), but Nm is most common in electrical motor specifications.

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    About the Author

    Md Jony Islam

    Md Jony Islam: Multidisciplinary Engineer & Financial Expert:

    Md. Jony Islam is a highly skilled professional with expertise in electronics, electrical, mechanical, and civil engineering, as well as finance. Specializing in transformer service and maintenance for 33/11kV substations, he ensures reliable and efficient electrical systems. His mechanical engineering skills drive innovative designs, while his financial acumen supports effective project budgeting. With a strong foundation in civil engineering, he contributes to robust infrastructure development. Md. Jony Islam's multidisciplinary approach ensures efficiency, quality, and reliability across all projects.