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Motor Power Formula:
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Motor power calculation determines the electrical power consumed by a three-phase electric motor. This is essential for proper motor sizing, energy efficiency analysis, and electrical system design.
The calculator uses the three-phase motor power formula:
Where:
Explanation: This formula calculates the real power consumed by a three-phase AC motor, accounting for the phase relationship between voltage and current.
Details: Accurate motor power calculation is crucial for selecting appropriate motor sizes, designing electrical systems, calculating energy consumption, and ensuring efficient operation of industrial equipment.
Tips: Enter voltage in volts, current in amps, and power factor as a decimal between 0 and 1. All values must be positive, with power factor typically ranging from 0.7 to 0.95 for most industrial motors.
Q1: What is power factor and why is it important?
A: Power factor represents the ratio of real power to apparent power. It indicates how effectively electrical power is being used, with higher values (closer to 1) indicating better efficiency.
Q2: Can this calculator be used for single-phase motors?
A: No, this calculator is specifically for three-phase motors. For single-phase motors, use the formula: P = V × I × PF.
Q3: What is the typical power factor range for electric motors?
A: Most three-phase induction motors have power factors between 0.85 and 0.95 at full load, which decreases at lighter loads.
Q4: How does motor power relate to horsepower?
A: To convert watts to horsepower, divide by 746 (1 HP = 746 watts). This calculator provides power in watts for direct electrical analysis.
Q5: Why is √3 used in three-phase calculations?
A: √3 accounts for the 120-degree phase separation between the three phases in a balanced three-phase system, representing the relationship between line and phase quantities.