Home
Back
Efficiency Formula:
| From: | To: |
Transformer efficiency is a measure of how effectively a transformer converts input power to output power. It is expressed as a percentage and indicates the ratio of output power to input power, accounting for losses in the transformer.
The calculator uses the efficiency formula:
Where:
Explanation: The formula calculates the percentage of input power that is successfully delivered as output power, with the difference representing energy losses in the transformer.
Details: Calculating transformer efficiency is crucial for evaluating energy performance, determining operational costs, and selecting appropriate transformers for specific applications. Higher efficiency transformers reduce energy waste and operating expenses.
Tips: Enter both secondary and primary power values in watts. Ensure secondary power is less than or equal to primary power. All values must be positive numbers.
Q1: What is a good efficiency rating for transformers?
A: Modern transformers typically have efficiency ratings between 95-99%, with higher values indicating better performance.
Q2: Why can't efficiency be 100%?
A: Transformers always have some energy losses due to core losses (hysteresis and eddy currents) and copper losses (resistance in windings).
Q3: How does load affect transformer efficiency?
A: Transformers are typically most efficient at 70-80% of their rated load. Efficiency decreases at very light or very heavy loads.
Q4: What factors influence transformer efficiency?
A: Key factors include core material, winding design, operating temperature, load characteristics, and transformer age.
Q5: How often should transformer efficiency be measured?
A: Efficiency should be checked during initial commissioning, after major repairs, and periodically during routine maintenance.