1. What is the DC Motor Power Formula?

The DC Motor Power Formula calculates the electrical power input to a DC motor using the fundamental relationship between voltage and current. This formula is essential for determining the energy consumption and electrical requirements of DC motors in various applications.

2. How Does the Calculator Work?

The calculator uses the DC motor power formula:

Where:

• \( P \) — Electrical power (Watts)
• \( V \) — Voltage (Volts)
• \( I \) — Current (Amperes)

Explanation: This formula represents the basic electrical power calculation where power equals the product of voltage and current flowing through the DC motor.

3. Importance of Power Calculation

Details: Accurate power calculation is crucial for proper motor selection, circuit design, energy efficiency analysis, and ensuring electrical systems operate within safe parameters without overload.

4. Using the Calculator

Tips: Enter voltage in volts (V) and current in amperes (A). Both values must be positive numbers greater than zero for accurate power calculation.

5. Frequently Asked Questions (FAQ)

Q1: Is this formula for input or output power?
A: This formula calculates the electrical input power to the motor. Mechanical output power would be lower due to efficiency losses.

Q2: Does this work for AC motors?
A: No, AC motor power calculation requires consideration of power factor: P = V × I × PF for single-phase, and P = √3 × V × I × PF for three-phase.

Q3: What is typical voltage range for DC motors?
A: DC motors commonly operate from 12V to 240V, with 12V, 24V, and 48V being most common in industrial and automotive applications.

Q4: How does motor efficiency affect power calculation?
A: Efficiency (η) affects mechanical output power: P_output = P_input × η. Typical DC motor efficiencies range from 70% to 90%.

Q5: Can I use this for battery sizing?
A: Yes, this calculation helps determine power requirements for proper battery selection and runtime estimation in DC systems.