1. What is the Voltage Formula?

The voltage formula (V = P/I) calculates the electrical potential difference (voltage) by dividing power (P) by current (I). This is fundamental in electrical engineering and motor calculations.

2. How Does the Calculator Work?

The calculator uses the voltage formula:

Where:

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

Explanation: The formula shows the direct relationship between power and voltage, and the inverse relationship between current and voltage.

3. Importance of Voltage Calculation

Details: Accurate voltage calculation is crucial for proper motor selection, circuit design, and ensuring electrical systems operate within safe parameters.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What if my motor has three phases?
A: For three-phase motors, you'll need to include the power factor in your calculations (V = P/(I × PF × √3)).

Q2: What are typical voltage values for motors?
A: Common voltages include 120V, 240V, 480V (AC) or 12V, 24V, 48V (DC), but always check motor specifications.

Q3: Why is voltage important for motors?
A: Voltage determines the motor's speed and torque characteristics. Incorrect voltage can damage the motor or reduce efficiency.

Q4: Can I use this for AC and DC motors?
A: This simple formula works for DC motors. For AC motors, power factor and phase must be considered.

Q5: How does voltage relate to motor power?
A: Power (watts) = Voltage × Current × Power Factor (for AC). Higher voltage typically allows for more power with less current.