1. What is the Motor Torque Equation?

The motor torque equation T = Kt × I calculates the torque produced by a DC motor, where T is torque in Newton-meters (Nm), Kt is the torque constant in Nm/A, and I is the current in amperes (A).

2. How Does the Calculator Work?

The calculator uses the motor torque equation:

Where:

• \( T \) — Torque (Nm)
• \( Kt \) — Torque constant (Nm/A)
• \( I \) — Current (A)

Explanation: The equation shows the direct proportional relationship between motor current and output torque, with the torque constant as the proportionality factor.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for motor selection, system design, performance analysis, and ensuring proper operation of mechanical systems driven by DC motors.

4. Using the Calculator

Tips: Enter torque constant in Nm/A and current in amperes. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the torque constant (Kt)?
A: The torque constant is a motor-specific parameter that relates the current input to the torque output. It's typically provided in the motor's datasheet.

Q2: How does this relate to motor voltage?
A: While this equation calculates torque from current, motor voltage relates to speed through the back EMF constant (Ke), which is numerically equal to Kt in SI units.

Q3: Does this equation work for all motor types?
A: This equation is specifically for DC motors. AC motors and brushless DC motors have different torque characteristics and equations.

Q4: What affects the torque constant value?
A: The torque constant is determined by the motor's physical design, including the number of windings, magnetic field strength, and motor geometry.

Q5: Can I use this for motor sizing?
A: Yes, this equation is fundamental for motor sizing calculations, helping determine the current requirements for a specific torque output.