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Motor Torque Formula:
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Motor torque is the rotational force produced by an electric motor. It determines the motor's ability to perform work and is a critical parameter in motor selection for various applications.
The calculator uses the torque formula:
Where:
Explanation: The constant 9550 is derived from unit conversions between power (kW), torque (Nm), and rotational speed (rpm).
Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required load without stalling or overheating.
Tips: Enter power in kilowatts (kW) and rotational speed in revolutions per minute (rpm). Both values must be positive numbers.
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 power from kW to W, time from minutes to seconds, and rotational speed from rpm to rad/s.
Q2: What is a typical torque range for electric motors?
A: Torque varies significantly based on motor size and type. Small motors might produce less than 1 Nm, while large industrial motors can produce thousands of Nm.
Q3: How does torque relate to motor performance?
A: Torque determines a motor's ability to overcome resistance and accelerate loads. Higher torque allows a motor to handle heavier loads or accelerate faster.
Q4: Can this formula be used for all types of motors?
A: This formula provides theoretical torque for ideal conditions. Actual torque may vary based on motor efficiency, type (AC, DC, servo), and operating conditions.
Q5: How does torque change with speed in different motor types?
A: In induction motors, torque typically decreases as speed increases. In DC motors, torque remains relatively constant across speeds. Servo motors maintain high torque even at low speeds.