1. What is the Brushless Motor Torque Equation?

The torque equation \( T = \frac{P \times 9550}{N} \) is used to calculate the torque produced by brushless motors in automotive applications, where P is power in kilowatts (kW) and N is rotational speed in revolutions per minute (RPM).

2. How Does the Calculator Work?

The calculator uses the torque equation:

Where:

• \( T \) — Torque in Newton-meters (Nm)
• \( P \) — Power in kilowatts (kW)
• \( N \) — Rotational speed in revolutions per minute (RPM)
• 9550 — Conversion factor combining unit conversions and constants

Explanation: The equation relates the mechanical power output of a motor to its rotational speed, with the constant 9550 derived from unit conversions (1 kW = 1000 W, 1 RPM = 2π/60 rad/s).

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for selecting appropriate motors, designing transmission systems, and ensuring optimal performance in automotive applications.

4. Using the Calculator

Tips: Enter power in kW and speed in RPM. All values must be positive numbers (power > 0, speed > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: 9550 combines the conversion factors between kW to W (1000) and RPM to rad/s (60/2π), simplifying the calculation.

Q2: What are typical torque values for automotive brushless motors?
A: Values vary widely but typically range from 50-500 Nm for passenger vehicles, with higher values for commercial vehicles.

Q3: How does temperature affect torque calculations?
A: Brushless motor torque may decrease at high temperatures due to increased resistance and potential demagnetization.

Q4: Can this formula be used for other motor types?
A: While the basic relationship holds for all motors, efficiency factors may differ for brushed, induction, or other motor types.

Q5: How does voltage affect torque in brushless motors?
A: In general, higher voltage allows for higher possible torque, but the actual torque depends on current and motor design.