Rectifier Efficiency & Power Efficiency

In this theory, the concept of rectifier efficiency and power efficiency in the rectifier is given.

Example of rectifier efficiency and power efficiency

The input of the single phase half wave rectifier is 60 W whereas the output is 24 W. Find out rectifier efficiency and power efficiency.

Solution

Rectifier efficiency

    = ( Output DC Power / Input AC Power ) × 100%

    = ( 24 / 60 ) × 100%

    = 40%

Power efficiency

• The input of the single half wave rectifier is 60 W , it means that 30 W for positive half cycle and remaining 30 W for negative half cycle. 
• As the single phase half wave rectifier conducts only for half cycle therefore only 30 W for positive half cycle is converted into 24 W and remaining 6 watts as loss.

Power efficiency 

     = ( Output DC Power / Half of Input AC Power ) × 100%

     = ( 24 / 30 ) × 100%

     =  80%

Therefore the rectifier efficiency is 40% whereas the power efficiency is 80%.

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