1. What is DC Motor Power?

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

2. How Does the Calculator Work?

The calculator uses the basic power equation:

Where:

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

Explanation: This fundamental equation shows that power is directly proportional to both voltage and current in a DC circuit.

3. Importance of Power Calculation

Details: Calculating motor power helps in selecting appropriate power supplies, determining energy consumption, estimating operating costs, and ensuring safe operation within design limits.

4. Using the Calculator

Tips: Enter voltage in volts and current in amps. Both values must be positive numbers. For accurate results, measure voltage under load conditions.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation valid for AC motors?
A: No, this simple formula is only for DC motors. AC motor power calculations require considering power factor and phase angle.

Q2: What's the difference between input and output power?
A: This calculator gives input power (electrical). Output power (mechanical) would be less due to efficiency losses.

Q3: How does power relate to torque?
A: Mechanical power = torque × angular velocity. The electrical power calculated here is converted to mechanical power minus losses.

Q4: What are typical voltage ranges for DC motors?
A: Common voltages include 6V, 12V, 24V, 48V for small motors, up to hundreds of volts for industrial motors.

Q5: How can I measure motor current safely?
A: Use a multimeter in series with the motor, or a clamp meter around one power lead, with motor under typical load.