1. What is the Power Formula in HP?

Definition: This calculator computes the mechanical power output in horsepower (HP) based on electrical input parameters.

Purpose: It helps electrical engineers and technicians determine the mechanical power output of motors based on their electrical characteristics.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( HP \) — Horsepower output
• \( V \) — Voltage (volts)
• \( I \) — Current (amps)
• \( \eta \) — Efficiency factor (0-1)
• \( PF \) — Power factor (0-1)
• 746 — Conversion factor (watts to HP)

Explanation: The electrical power (V×I) is adjusted for motor efficiency and power factor, then converted to mechanical horsepower.

3. Importance of Power Calculation

Details: Accurate HP calculation ensures proper motor sizing, energy efficiency, and system performance in industrial and commercial applications.

4. Using the Calculator

Tips: Enter the voltage in volts, current in amps, efficiency (default 0.9), and power factor (default 0.85). Efficiency and power factor must be between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 746?
A: 746 watts equals 1 horsepower, so we divide by this number to convert from watts to HP.

Q2: What's a typical efficiency value?
A: Most electric motors have efficiencies between 0.8 and 0.95 (80-95%).

Q3: What affects power factor?
A: Power factor depends on motor type and load conditions, typically ranging from 0.7 to 0.95.

Q4: Can I use this for three-phase motors?
A: For three-phase, you'd need to multiply by √3 (1.732) and use line-to-line voltage.

Q5: How accurate is this calculation?
A: It provides theoretical values; actual performance may vary due to operating conditions and motor design.