Wattage Formula:
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Electric motor wattage represents the power consumption of an electric motor, calculated from its horsepower rating. It helps determine the electrical requirements and energy consumption of motor-driven equipment.
The calculator uses the wattage formula:
Where:
Explanation: The formula converts mechanical horsepower to electrical wattage using the standard conversion factor of 746 watts per horsepower.
Details: Accurate wattage calculation is crucial for proper electrical system design, circuit sizing, energy consumption estimation, and ensuring motor compatibility with power sources.
Tips: Enter the horsepower rating of the electric motor. The value must be greater than zero. The calculator will provide the equivalent wattage.
Q1: Why is the conversion factor 746?
A: 746 watts equals 1 mechanical horsepower, which is the standard conversion factor established by James Watt's experiments with horses.
Q2: Is this calculation accurate for all motor types?
A: This provides the theoretical power conversion. Actual power consumption may vary due to motor efficiency, power factor, and operating conditions.
Q3: How does motor efficiency affect actual power consumption?
A: Less efficient motors will draw more electrical power than calculated to produce the same mechanical output.
Q4: Can this calculator be used for three-phase motors?
A: Yes, the horsepower to watts conversion is the same, but three-phase power calculations require additional factors like voltage and power factor.
Q5: What's the difference between input and output power?
A: This calculation gives output power. Input power would be higher due to efficiency losses in the motor.