what is the purpose of a rectifier?

Answer 1

-The purpose of the rectifier section is to convert the incoming ac from a transformer or other ac power source to some form of pulsating dc. That is, it takes current that flows alternately in both directions and modifies it so that the output current flows only in one direction.

The circuit required to do this may be nothing more than a single diode, or it may be considerably more complex. However, all rectifier circuits may be classified into one of two categories:
-half wave and full wave

[The purpose of a rectifier is to convert an AC waveform into a DC waveform. There are two different rectification circuits, known as 'half-wave' and 'full-wave' rectifiers. Both use components called diodes to convert AC into DC.

A diode is a device which only allows current to flow through it in one direction. In this direction, the diode is said to be 'forward-biased' and the only effect on the signal is that there will be a voltage loss of around 0.7V. In the opposite direction, the diode is said to be 'reverse-biased' and no current will flow though it.]

Answer 2

A rectifier allows current to pass easily in one direction but not the other

So it can be used to block
or to clamp (if power as applied with the wrong polarity)

or to convert AC to uni directional half wave

rectifiers in a bridge convert AC to full wave raw DC

capacitors then reduce the ripple to give DC

Silicon diodes are the most common
But you can have Cu/Cu oxide stacks
or Thermionic valves

(the terms Cathode and Anode came from the thermionic valve rectifiers)

Current flows into the Anode and out of the Cathode
so the Cathode is marked with a bar on silicon diodes

they have a logarithmic voltage current relationship
and at normal temperature and current drop about
0.6 to 1 volt

Answer 3

Rectifiers are used in electrical circuits to covert alternating current to direct current. They employ diodes, electrical devices that permit the flow of current in one direction only, to accomplish this conversion.There are two types of AC/DC rectifiers: half-wave and full-wave units. Generally speaking, full-wave rectifiers offer a cleaner, more consistent signal conversion from alternating current to direct current than their half-wave counterparts. This comes at the cost of increased voltage drop across the rectifier connection, as full-wave rectifiers use four diodes for the conversion process, with two diodes active at one time, while half-wave rectifiers only have one diode.

https://www.electrikals.com/

Answer 4

It is generally the first stage in an AC/DC conversion. If you were to use a full wave rectifier, you would see only a positive half cycle every 180 degrees, this would look like |sin x|. from this you would take this function as ripple. .. using a cap, you could then smooth out this ripple, resulting in an approximately DC signal.

Answer 5

In electronics, a rectifier changes Alternating Current (AC) into pulsating Direct Current (DC). For example, many devices require an "adapter" that you plug into a wall socket (AC)...what comes out is usually low voltage DC.

Answer 6

It converts AC signal to DC signal

Answer 7

It can be used for AC/DC conversion or as a frequency doubler.

Answer 8

broadly to co0nvert AC to DC

Answer 9

It changes a/c current to d/c current.

Answer 10

it converts ac to dc