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 motor selection and system design.

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 simple formula calculates the electrical power input to a DC motor based on the voltage applied and current drawn.

3. Importance of Power Calculation

Details: Knowing the power requirements helps in proper motor selection, circuit design, and ensuring the power supply can handle the load.

4. Using the Calculator

Tips: Enter the operating voltage and current draw of your DC motor. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

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

Q2: How does this relate to motor torque?
A: Mechanical power (P) relates to torque (τ) and angular velocity (ω) by P = τ × ω. The electrical power calculated here is the input to the motor.

Q3: What about AC motors?
A: AC motor power calculation is more complex, involving power factor. This calculator is for DC motors only.

Q4: What's typical power range for small DC motors?
A: Small hobby motors might be 1-100W, while industrial DC motors can range up to several kilowatts.

Q5: How accurate is this calculation?
A: It gives precise electrical power input, but actual mechanical power depends on motor efficiency which varies with load.