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Motor Capacity Formula:
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Motor capacity refers to the power output capability of an electric motor, typically measured in watts (W) or horsepower (HP). It represents the motor's ability to perform work and is a crucial parameter in motor selection and application design.
The calculator uses the motor capacity formula:
Where:
Explanation: The formula calculates the actual power output by accounting for electrical input power (V × I) and the motor's efficiency factor.
Details: Accurate motor capacity calculation is essential for proper motor selection, ensuring the motor can handle the required load without overheating or damage. It helps in energy efficiency optimization and system design.
Tips: Enter voltage in volts, current in amps, and efficiency as a decimal between 0 and 1 (e.g., 0.85 for 85% efficiency). All values must be positive numbers.
Q1: What is motor efficiency?
A: Motor efficiency is the ratio of mechanical power output to electrical power input, expressed as a percentage or decimal. It indicates how effectively the motor converts electrical energy to mechanical energy.
Q2: How does motor capacity relate to horsepower?
A: 1 horsepower (HP) equals approximately 746 watts. To convert watts to HP, divide the wattage by 746.
Q3: Why is efficiency important in motor calculations?
A: Efficiency accounts for energy losses due to heat, friction, and other factors. Without considering efficiency, the calculation would show input power rather than actual usable output power.
Q4: What are typical efficiency values for electric motors?
A: Standard efficiency motors range from 80-90%, high-efficiency motors from 90-95%, and premium efficiency motors can reach 95-97%.
Q5: Can this formula be used for all motor types?
A: This formula works for DC motors and single-phase AC motors. For three-phase AC motors, the formula includes an additional power factor component.