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Motor Torque Formula (Metric):
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Motor torque calculation determines the rotational force produced by an electric motor. It's a critical parameter in mechanical engineering for sizing motors, designing drive systems, and ensuring proper operation of machinery.
The calculator uses the metric torque formula:
Where:
Explanation: The constant 9550 is derived from unit conversion factors that relate power, rotational speed, and torque in the metric system.
Details: Accurate torque calculation is essential for selecting appropriate motors, designing mechanical systems, preventing overload conditions, and ensuring efficient operation of industrial equipment.
Tips: Enter power in kilowatts (kW) and rotational 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 the conversion between different units: 9550 = 60/(2π) × 1000, which converts from watts to kilowatts and from rad/s to rpm.
Q2: What is a typical torque range for industrial motors?
A: Torque values vary greatly depending on motor size and application, 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 perform work. Higher torque allows a motor to overcome greater resistance and drive heavier loads.
Q4: Can this formula be used for all types of motors?
A: This formula provides theoretical torque output for electric motors at a given speed and power. Actual torque may vary due to efficiency losses and motor characteristics.
Q5: How does torque change with motor speed?
A: For AC induction motors, torque typically decreases as speed increases beyond the base speed. DC motors can maintain constant torque across a range of speeds.