1. What is the Torque Formula?

The torque formula (τ = k × I × B) calculates the rotational force produced by an electric motor, where k is a motor constant, I is current, and B is magnetic field strength. This fundamental equation helps in motor design and performance analysis.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( \tau \) — Torque (N·m)
• \( k \) — Motor constant (unitless)
• \( I \) — Current (A)
• \( B \) — Magnetic field strength (T)

Explanation: The torque produced by an electric motor is directly proportional to both the current through its windings and the strength of the magnetic field.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for motor selection, performance prediction, and ensuring mechanical systems have sufficient rotational force for their intended application.

4. Using the Calculator

Tips: Enter the motor constant (typically provided in specifications), current in amperes, and magnetic field strength in teslas. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the motor constant (k)?
A: The motor constant is a value specific to each motor design that relates current and magnetic field to torque output.

Q2: How do I measure magnetic field strength?
A: Magnetic field strength is typically measured with a gauss meter or teslameter, or can be obtained from motor specifications.

Q3: What are typical torque values for electric motors?
A: Torque values vary widely from milli-newton meters in small motors to thousands of N·m in industrial motors.

Q4: Does this formula work for all motor types?
A: This basic formula applies to DC motors and serves as a foundation, though AC motor calculations may involve additional factors.

Q5: How does temperature affect torque?
A: Higher temperatures can reduce magnetic field strength and increase winding resistance, potentially decreasing torque output.