Home
Back
Torque Formula:
| From: | To: |
The torque formula T = (P × 9550) / N calculates the torque of an electric motor, where P is power in kilowatts (kW) and N is rotational speed in revolutions per minute (rpm). The constant 9550 is derived from unit conversion factors.
The calculator uses the torque formula:
Where:
Explanation: This formula relates the mechanical power output of a motor to its rotational speed and torque production.
Details: Accurate torque calculation is essential for motor selection, mechanical design, power transmission system design, and ensuring proper operation of machinery.
Tips: Enter power in kilowatts (kW) and rotational speed in rpm. Both values must be positive numbers greater than zero.
Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversions: 1 kW = 1000 W, 1 minute = 60 seconds, and the relationship between power, torque, and angular velocity.
Q2: Can I use horsepower instead of kilowatts?
A: Yes, but you'll need to convert horsepower to kilowatts first (1 hp = 0.7457 kW) or use a different formula specifically for horsepower.
Q3: What is a typical torque range for electric motors?
A: Torque varies greatly by motor type and size, from less than 1 Nm for small motors to thousands of Nm for large industrial motors.
Q4: How does torque relate to motor performance?
A: Torque determines a motor's ability to overcome resistance and perform work. Higher torque allows a motor to handle heavier loads or accelerate faster.
Q5: Does this formula work for all types of motors?
A: This formula applies to all rotating machinery, but specific motor types may have additional considerations for peak torque, starting torque, or efficiency factors.