Define PIV, TUF, ripple factor, efficiency of rectifier.

Define PIV, TUF, ripple factor, efficiency of rectifier.
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2 Answers

Answer :

Peak Inverse Voltage (PIV): The maximum value of reverse voltage (for the diode in a rectifier) occurring at the peak of the negative cycle of the input cycle is called Peak Inverse Voltage.

Transformer Utilization Factor (TUF): It is the ratio of dc power delivered to the load and the ac rating of the transformer secondary. 

Ripple factor: The factor which represents ac component present in the rectifier output, with respect to dc component is called Ripple Factor. OR The ratio of r.m.s. value of a.c. component to the d.c. component in the rectifier output is known as ripple factor.

Efficiency of rectifier : This is defined as the ratio of dc power delivered to the load to the ac input power from the secondary winding of the transformer. 
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Answer :

PIV: Peak Inverse Voltage (PIV) is defined as the maximum negative voltage which appears across non-conducting reverse biased diode.

TUF : Transformer Utilization Factor (TUF) is defined as the ratio of DC output power to the AC power ratings of the transformer. Mathematically it is expressed as,

image

Ripple Factor: Ripple Factor is defined as the ratio of RMS value of the AC component of output to the DC or average value of the output. Mathematically it is expressed as,

image

Efficiency of rectifier:

η = DC output power/ AC input power = PLdc / Pac


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