1. What is the Torque Formula?

The torque formula calculates rotational force from power and RPM. It provides a fundamental relationship between these mechanical properties, essential for motor and engine design.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( P \) — Power in kilowatts (kW)
• \( RPM \) — Rotational speed in revolutions per minute
• 9550 — Conversion constant (derived from unit conversions)

Explanation: The formula converts power and rotational speed into torque, representing the rotational force produced by a motor or engine.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for motor selection, mechanical design, power transmission systems, and understanding motor performance characteristics.

4. Using the Calculator

Tips: Enter power in kilowatts (kW) and RPM in revolutions per minute. All values must be valid (power > 0, RPM > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between Kv and torque?
A: Kv (RPM per volt) is inversely related to torque. Higher Kv motors typically produce less torque but higher RPM, while lower Kv motors produce more torque at lower RPM.

Q2: What are typical torque values for electric motors?
A: Torque values vary significantly based on motor size and type, ranging from fractional Nm for small motors to hundreds of Nm for large industrial motors.

Q3: How does voltage affect torque?
A: For DC motors, torque is proportional to current, while RPM is proportional to voltage. Higher voltage typically allows higher RPM but doesn't directly increase torque.

Q4: Can this formula be used for all motor types?
A: This formula provides a general relationship between power, RPM and torque, but specific motor characteristics and efficiency should be considered for precise calculations.

Q5: What is the significance of the 9550 constant?
A: The constant 9550 comes from unit conversions: 60,000/(2π) ≈ 9550, converting between different units of power, rotational speed, and torque.