CHARACTERISTICS OF RECTIFIERS BY K.JAYASRI (221710303019)

CHARACTERISTICS OF RECTIFIERS:

There are some characteristics to the half wave rectifier. They are:

1. Efficiency: The efficiency is defined as the ratio output DC power to input AC power.   η=Pdc/Pac

It is present in terms of ripples in the output which is fluctuating component present in the output.

NOTE: More the rectifier efficiency, less is the ripple content in the output.

      2. Ripple Factor: The ripple factor is defined as the amount of AC content in the output DC. Less the ripple factor, performance of the rectifier is more. Ideally, there should not be any ripples in the rectifier output. The measure of such ripples in the output is found out with the help of a factor called ripple factor.

      𝜸=Iac/Idc

NOTE: Smaller the ripple factor, closer is the output to a pure DC. 

      3. Peak Inverse Voltage(PIV): It is defined as the maximum voltage that a diode can withstand in reverse bias. During the reverse bias, as the diode does not conduct, total voltage drops across the diode. Thus, peak inverse voltage is equal to the input voltage Vs.

NOTE: A diode must be selected based on the PIV rating and circuit specifications. 

      4. Transformer Utilization Factor(TUF): The TUF is defined as the ratio of DC power delivered to the load and the AC rating of the secondary transformer.