Experiment No.: 3
Construction of full-wave rectifier circuit & draw input, output waveforms – with filters and
- To construct full-wave rectifier circuit.
- To draw input, output waveforms – with filters and without filters.
The conversion of AC into DC is called Rectification. Electronic devices can convert AC power into DC power with high efficiency.
Full Wave Rectifier:
The full-wave rectifier consists of a center-tap transformer, which results in equal voltages above and below the center-tap. During the positive half cycle, a positive voltage appears at the anode of D1 while a negative voltage appears at the anode of D2. Due to this diode D1 is forward biased it results in a current Id1 through the load R. During the negative half cycle, a positive voltage appears at the anode of D2 and hence it is forward biased. Resulting in a current Id2 through the load at the same instant a negative voltage appears at the anode of D1 thus reverse biasing it and hence it doesn’t conduct.
- Make connections as per the Circuit Diagram.
- Note down the AC and DC Voltages and Currents without Filter and with Load.
- And again observe the AC and DC Voltages and Currents with Filter and with load.
- Observe the Voltage across the secondary of the Transformer (i.e. Vrms).
Observation Table: Vac = 9.25 V (Voltage across the secondary of the transformer)
|Without Filter||9.25 V||7.36 V||13.12 V||1 kOhm|
|With C-Filter||9.27||8.56 V||13.42 V||100 µF||1 kOhm|
|Parameter||Without Filter||With C-Filter|
|Efficiency ((dc power/ac power)x100 %)||63.3 %||85.26 %|
|Sl No.||Name of Apparatus||Quantity||Specification||Makers name|
|1.||Half wave & full wave rectifier trainer kit||1||230 V, 50 Hz input, 1N4007 Diodes||M.E.W.|
|2.||Digital Multimeter||1||0-750 V AC, 0-1000 V DC, 0-10 A||Akademika|
|3.||Digital Storage Oscilloscope||1||100 MHz||Akademika|
Remarks: The input and output waveforms are visulalised in CRO perfectly.