Home
Back
Output Power Formula:
| From: | To: |
Output power refers to the actual power delivered by an electrical or mechanical system after accounting for losses. It represents the useful power available for performing work, calculated by multiplying input power by the system's efficiency.
The calculator uses the output power formula:
Where:
Explanation: The formula calculates the actual power output by considering the electrical input power (V × I) and multiplying it by the system's efficiency factor to account for energy losses.
Details: Calculating output power is essential for designing electrical systems, selecting appropriate components, determining system performance, and ensuring energy efficiency in various applications from power supplies to motor drives.
Tips: Enter voltage in volts, current in amperes, and efficiency as a percentage (0-100%). All values must be positive numbers with voltage and current greater than zero.
Q1: What's the difference between input and output power?
A: Input power is the total power supplied to a system, while output power is the useful power delivered after accounting for losses due to inefficiency.
Q2: How is efficiency expressed in the formula?
A: Efficiency is entered as a percentage but converted to decimal form in the calculation (e.g., 85% becomes 0.85).
Q3: What are typical efficiency values for electrical systems?
A: Efficiency varies by system type: switching power supplies (80-95%), linear regulators (30-60%), motors (70-95%), transformers (95-99%).
Q4: Can this formula be used for AC systems?
A: For AC systems, use RMS values for voltage and current, and include power factor if calculating apparent vs. real power.
Q5: Why is output power important in system design?
A: It determines the actual work capacity of a system, helps in thermal management planning, and ensures proper component sizing for reliable operation.