1. What is Motor Wattage?

Motor wattage represents the electrical power consumed by a DC motor, calculated as the product of voltage and current. It indicates the rate at which electrical energy is converted into mechanical energy.

2. How Does the Calculator Work?

The calculator uses the fundamental power formula:

Where:

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

Explanation: This formula represents the basic relationship in electrical circuits where power equals voltage multiplied by current.

3. Importance of Power Calculation

Details: Calculating motor wattage is essential for proper motor selection, circuit design, energy efficiency analysis, and ensuring electrical safety by preventing overload conditions.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Is this formula only for DC motors?
A: This formula works for DC circuits and resistive AC loads. For AC motors with inductive loads, power factor must be considered.

Q2: What is the difference between input power and output power?
A: Input power is the electrical power consumed (calculated here), while output power is the mechanical power delivered, which is lower due to efficiency losses.

Q3: How does motor efficiency affect power calculation?
A: Motor efficiency represents the ratio of output mechanical power to input electrical power. Typical DC motor efficiencies range from 70% to 90%.

Q4: Why is power calculation important for circuit design?
A: Proper power calculation ensures correct wire sizing, fuse selection, and prevents overheating in electrical circuits.

Q5: Can this calculator be used for AC motors?
A: For AC motors, use P = V × I × PF (power factor) for accurate power calculation, as AC circuits involve reactive power components.