Home
Back
Single Phase Motor Power Formula:
| From: | To: |
The Single Phase Motor Power Formula calculates the electrical power consumed by a single-phase motor. It considers voltage, current, and power factor to determine the actual power in watts.
The calculator uses the single phase motor power formula:
Where:
Explanation: The formula calculates real power by multiplying voltage and current, then adjusting for the power factor which represents the phase difference between voltage and current waveforms.
Details: Accurate power calculation is essential for motor sizing, electrical system design, energy consumption analysis, and determining operational costs of single-phase motors.
Tips: Enter voltage in volts, current in amperes, and power factor as a decimal between 0 and 1. All values must be valid (voltage > 0, current > 0, power factor between 0-1).
Q1: What is power factor and why is it important?
A: Power factor represents the efficiency of power usage. A lower power factor means more current is required to deliver the same amount of real power, leading to higher energy losses.
Q2: What are typical power factor values for single-phase motors?
A: Typical power factors range from 0.7 to 0.95, depending on motor design, load conditions, and efficiency.
Q3: How does this differ from three-phase power calculation?
A: Three-phase power calculation includes an additional factor of √3 and may use line-to-line or line-to-neutral voltage measurements.
Q4: Can this formula be used for all single-phase motors?
A: Yes, this formula applies to all single-phase AC motors including split-phase, capacitor-start, and permanent split capacitor motors.
Q5: Why is the calculated power different from motor nameplate rating?
A: Nameplate ratings typically show mechanical output power, while this calculation gives electrical input power. The difference accounts for motor efficiency losses.