A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The reverse operation is performed by the inverter.
The process is known as rectification, since it "straightens" the direction of current. Physically, rectifiers take a number of forms, including vacuum tube diodes, wet chemical cells, mercury-arc valves, stacks of copper and selenium oxide plates, semiconductor diodes, silicon-controlled rectifiers and other silicon-based semiconductor switches. Historically, even synchronous electromechanical switches and motors have been used. Early radio receivers, called crystal radios, used a "cat's whisker" of fine wire pressing on a crystal of galena (lead sulfide) to serve as a point-contact rectifier or "crystal detector".
Rectifiers have many uses, but are often found serving as components of DC power supplies and high-voltage direct current power transmission systems. Rectification may serve in roles other than to generate direct current for use as a source of power. As noted, detectors of radio signals serve as rectifiers. In gas heating systems flame rectification is used to detect presence of a flame.
Depending on the type of alternating current supply and the arrangement of the rectifier circuit, the output voltage may require additional smoothing to produce a uniform steady voltage. Many applications of rectifiers, such as power supplies for radio, television and computer equipment, require a steady constant DC voltage (as would be produced by a battery). In these applications the output of the rectifier is smoothed by an electronic filter, which may be a capacitor, choke, or set of capacitors, chokes and resistors, possibly followed by a voltage regulator to produce a steady voltage.
More complex circuitry that performs the opposite function, that is converting DC to AC, is called an inverter.
Hi I'm new here. I'm trying to obtain the max power possible from a standard 120VAC 15A outlet, but the wave must be rectified so it is always positive. I always see a bridge rectifier circuit paired with a transformer, but if I'm going for max power, and not trying to achive a specific...
in my textbook, they've said that a capacitor is used to filter an input from a full wave rectifier.. So that the output does not fluctuate (much) and hence convert an a/c current to d/c current. But, the textbook isn't clear about how this happens.
It just says that the time constant for the...
I wanted to make a negativer full bridge rectifier circuit and filter it, so that after it went past the bridge, the output voltage would be full wave but negative. Tried reversing the diodes on the actual full bridge rectifier but doesn't work.
Refer to the diagram on the left,is it...
Hi, I'm having a problem while running a simulation of a Bridge Rectifier on PSpice.
This is my circuit schematic:
http://img521.imageshack.us/img521/276/q1tasks2schematicsxp3.jpg
Vs is at 15sin(100*pi*t).
And this is the input and output waveforms plotted by PSpice...
I want to make a bridge rectifier circuit to give me 6v or 9v DC power from 220v 50-60 Hz AC supply.
I know the circuit, but don't know which diodes and capacitors to buy for it.
This would be the first time I'm doing something like this, so any suggestions/tips would be appreciated.
1. i have a transformor 12 v rms i want to do a full wave rectifier bridge with a capacitor and get a 12v dc
2. i need to know how i can calculat the capacitor needed and the resistor and wat to know how many voltage should the capacitor be (NB: i don't know wat is the current of the...
Homework Statement
A half wave rectifier is supplying a load current of 100 mA. The input frequency is 60 Hz. Find the capacitor value required to limit the ripple ot 160 mVpp.
Really... I can solve this I'm sure... But I'm wondering what formula I need to use... I've never been shown one...
Could anyone suggest what size and best type of bridge rectifier to use with this motor,Thrige Titan 10 HP, 7.5 KW,240V DC- 36.3 Amp,Excitation 150/300 V- 1.4/0.7 A.
Also would I be able to run this motor off my house current of 240 V, This motor will be used to power a winch for pulling logs...
Hello I'm a beginner (Second Semester) at Electronics Engineering.
In the attachment is the image of the filter rectifier circuit that I am analyzing. My professor has given us questions and their solutions but for my full wave filter rectifier analysis the numbers are not the same.
The...
I made a (bridge) rectifier for a simple circuit that would make several LEDs light up. When it was finished, I used a multimeter to measure the voltages between several points and got the readings you can see in http://users.pandora.be/k-a-d/rectifier.jpg". Why is there still an AC voltage...
[SOLVED] Thevenin equivalent of a half-wave rectifier
Hello folks,
I'm trying to wrap my head around the process of reducing a half-wave rectifier (w/ filter) with an AC input into a simple Thevenin circuit with a DC equivalent voltage. My brain seems to be stuck in "but the input is not...
I, in fact, know the correct Fourier representation
for the following (it was given to me):
f(t)=0 \text { if } -\pi \leq \omega t \leq 0
and
f(t)=sin(\omega t) \text { if } 0 \leq \omega t \leq \pi
\hrule
I'm curious about the derivation that led to it -- specifically...
I've got a query on rectifiers, pls take a look at this diagram.
If I switch the diode at the bottom around to face the opposite direction.
Will I still get the same output wave?
Or will I get a half-wave rectifier that looks like this? :confused:
I am putting together a control circuit for a DC motor. This motor requires 110 volts DC. It must be variable speed.
I happen to have a nice continuously variable transformer box that goes smoothly from 0 to 130 volts. This should take care of the speed variations.
I hooked this up to a...