What is the difference between full wave rectifier and half wave rectifier?

Answer 1

Alternating current (AC) consits of positive half cycles interspersed by negative half cycles.

A half-wave rectifier uses only one of these; during the other part of the cycle the output is zero. Only one diode is needed.

A simple full-wave rectifier is fed from a center-tapped transformer. It outputs each half cycle in turn; since they are taken from opposite ends of the transformer they all have the same polarity. Two diodes are needed, but it is much easier to get a smooth continuous output from this rectifier.

The best of the systems is a full-wave bridge rectifier. Difficult to describe in words, it uses four diodes and doesn't need a center-tapped transformer.

Answer 2

Half wave rectifier , which is use only rectify(convert) the one set of half cycle either positive cycle or negative cycle of AC to DC. It gives 50% of AC & 50% of DC.

Full wave rectifier convert from AC to DC of both half cycles so it gives 100% of DC.

Bhavanisankar.s

Maint. Er

Answer 3

A full wave uses two diodes and a center tapped transformer. Requires heavier filtering than a bridge

A bridge uses four diodes, and no center tap is required. smoother output waveform requires less filtering.

ANSWER: The bridge circuit will provide twice the available voltage to the output but not twice the power, and the filtering is the same of both.

Answer 4

Half-wave rectification is achieved using a single diode in a one phase supply, or by using three diodes in a three phase supply.

In half wave rectification, either the positive or negative half of the AC wave is passed and the other half is blocked. Since only one half of the input waveform reaches the output, it is very inefficient if used for power transfer.

A full-wave rectifier converts the whole of the input waveform to one of constant polarity (positive or negative) at its output. Full-wave rectification converts both polarities of the input waveform to DC (direct current), and is more efficient.

Answer 5

A half wave rectifier will only rectify the positive portion of the sine wave. A full wave rectifier will rectify the positive portion then it inverts the negative portion so that you have a continuous positive wave.

Answer 6

fullwave rectifier has two diodes.one diode conduct in +ve half cycle and another conduct in -ve half cycle.

bridge rectifier has four diodes.two diodes conducts in +ve half cycle and another two conducts in -ve half cycle.

Answer 7

Those terms are different names for the same thing. When properly connected,

a bridge rectifier is always a full-wave rectifier.

ANSWER: The difference is that twice the input voltage will be available to the output, That does not means twice the power.

Answer 8

• A full wave bridge rectifier requires 4 diodes but does not use a center tap on the transformer secondary. The diode bridge has 2 AC terminals (connected to the transformer secondary), 1 negative terminal (usually grounded), and 1 positive terminal (usually the unfiltered DC output).
• A full wave center tapped rectifier requires 2 diodes and requires a center tap on the transformer secondary which is usually grounded. The 2 diodes are connected in the same polarity from each of the ends of the transformer secondary to the unfiltered DC output.
• A balanced full wave center tapped bridge rectifier requires 4 diodes and requires a center tap on the transformer secondary which is grounded. The diode bridge has 2 AC terminals (connected to the ends of the transformer secondary), 1 negative terminal (the unfiltered negative DC output), and 1 positive terminal (the unfiltered positive DC output).

The bridge may be a preassembled encapsulated 4 terminal device or may be constructed from 4 discrete diodes.

Answer 9

The half-wave rectifier gives one pulse every cycle, while a full-wave rectifier gives two pulses per cycle. With two pulses per cycle instead of one, the peak current is less so that the resistance of the transformer is less important and the output from the reservoir capacitor is better regulated (the voltages changes less with changes in the load current).

Answer 10

Both are full wave rectifiers. But in bridge rectifier we don't need centre tap at the secondary of step down transformer. Of course we need four diodes in number against full wave where we could use just two diodes