1. What is DC Motor Power?

DC motor power represents the rate at which electrical energy is converted to mechanical energy. It's a crucial parameter for selecting motors and designing electrical systems.

2. How Does the Calculator Work?

The calculator uses the fundamental power equation:

Where:

• \( P \) — Power in watts (W)
• \( V \) — Voltage in volts (V)
• \( I \) — Current in amperes (A)

Explanation: This formula calculates the electrical input power to a DC motor by multiplying the voltage across the motor by the current flowing through it.

3. Importance of Power Calculation

Details: Calculating motor power helps in proper motor selection, circuit design, and ensuring electrical systems operate within safe parameters.

4. Using the Calculator

Tips: Enter voltage in volts and current in amps. Both values must be positive numbers. The calculator will compute the power in watts.

5. Frequently Asked Questions (FAQ)

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

Q2: Does this work for AC motors?
A: No, AC motor power calculation requires considering power factor. This is for pure DC circuits.

Q3: What's typical power for small DC motors?
A: Small hobby motors might be 5-50W, while industrial DC motors can range from hundreds to thousands of watts.

Q4: How does this relate to torque?
A: Mechanical power (torque × RPM) is related but requires knowing the motor's efficiency and speed characteristics.

Q5: Why measure both voltage and current?
A: Voltage alone doesn't indicate power - a high voltage motor drawing minimal current may produce less power than a lower voltage motor with higher current.