Questions tagged [bridge-rectifier]

an arrangement of four or more diodes in a bridge circuit configuration which provides the same output polarity for either input polarity. It is used for converting an alternating current (AC) input into a direct current (DC) output.

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266 views

Bridge rectifier peak voltage at load

Assuming the peak voltage at \$V_1\$, \$V_{1p}=9.25V\$ and ideal silicon diodes (\$0.7V\$ drop in forward bias) and the DC output in \$V_0\$ is \$5V\$. I want to find the \$V_{op}\$, peak voltage at \$...
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460 views

Trouble understanding charging capacitor on bridge rectifier

simulate this circuit – Schematic created using CircuitLab Boylestad's book says that with the diodes conducting the effect of the resistor is "removed" so the \$RC\$ constant is so small that ...
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2k views

Bridge rectifier output voltage at no load?

(First posting) I am building a simple PSU with a torroidal transformer and bridge rectifier. I'd like to know the output DC voltage from the rectifier while under load. e.g. charging a battery. I ...
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497 views

Bridge rectifier made of ideal diodes

So I was solving a CIE Physics (9702) past paper and came across this question: [9709/41/O/N/09 // Q.7.B.] The questions were: 7.(b).(i) On the axes of Fig. 7.2, draw a graph to show the variation ...
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128 views

Can I put graetz circuits' outputs in series and parallel?

I will have multiple coils that generate alternate current. Those coils are placed around a wheel which has some magnets on it. My current plan is to make it look like this: I was considering ...
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481 views

SMPS Input Circuit - Formulas resolving diodes, capacitors, voltage, etc

For fun, I made a project from an old PSU and the parts inside it, and ended up with my new HVDC power supply. Consider this diagram: Whenever I plug this in to 120 VAC, I measure 350 VDC on the ...
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442 views

How can I convert 110V AC to 20V DC that pulls around 1.5 Amps without a transformer

I have a DC fan motor that is currently being powered by voltage dropper in the form of a heating coil, and then bridge rectified. I want to separate the heating coil from the fan motor, but I'm not ...
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1k views

Location of diode bridge on transformer circuit?

I'm designing a full bridge rectifier that takes 110vAC to 4-16vDC for input into a 5v switching regulator. I opened a few 5v power supplies and they place the bridge on the high voltage side. Why ...
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1answer
1k views

Selecting rectifiers for a welding machine

I have a welding machine that has a rated output of 230 amps with the AC output. The DC output is 140 amps. I was a bit puzzled as to why this was, but from what I can tell they use a lower voltage ...
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24k views

How to calculate voltage after rectifier?

Well, my question is: "Is this web site wrong?" It calculate the voltage after rectivier as Vdc = Vac * 1.41 The site is a calculator that shows the oltage after rectifier. It seems it forgets ...
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793 views

How to estimate the maximum current provided by a transformer?

I have a transformer that outputs 14.3V (AC of course) and the current in short-circuit is about 13A (made a beautiful spark when I measured it :) ). Can I guesstimate from here what is the 'normal' ...
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473 views

Replacing 75 ohm heating coil with resistors?

I am trying to remove the thermal fuse, thermostat, 75 ohm, and 150 ohm heating elements from this diagram: This is the schematic for a popcorn machine that has two heating coils and a DC fan to blow ...
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155 views

HF transformer fed fed diode rectifier not working

As part of my pure sine wave inverter, I have a DC - DC subsystem in which a signal stepped up through a HF transformer is put through an uncontrolled diode rectifier to get a DC output which I am o ...
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2k views

Power Losses in a 3 phase rectifier

I'm trying to speck out a heat sink for a 3 phase rectifier. The rectifier consists of 3 individual rectifier blocks. I need a heat sink for each block. The rectifier is for a generator and all the ...
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306 views

Problem with AC/DC power supply

I tried to make an AC / DC power supply and it worked perfectly fine,by changing the switch it would either provide DC from the middlle wires or AC from the wires on the sides.Here is a picture of the ...
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5k views

Problem with capacitor after bridge rectifier

I wanted to make a simple power supply so I made a bridge rectifier with 4 diodes rated 6 amps, then I connected the bridge to a transformer (220 volts to 9 volts (measured 9.4 with voltmeter) 50 Hz) ...
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Why bridge rectifiers are used in case of DC power supply.?

I was searching for 12v to 3.3v/5v DC voltage conversion. I found many schematics and the voltage regulators. But in most of the ...
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230 views

LT4320 Ideal Diode Bridge Controller - supply voltage max ratings reference point

The LT4320 and MOSFET bridge was suggested as a low dropout bridge rectifier in another post. I hadn't come across it before so I investigated further. I'm puzzled by the IN1, IN2 maximum ratings. ...
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529 views

Bulk Capacitance and Inrush Current Limiting Diodes burn for PSU first stage

I've been trying to get the first stage of my power supply working for some time so that I can move on to the more interesting Voltage regulation circuitry for my variable bench power supply. After ...
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5answers
342 views

Low-voltage rectification

I have a 19kHz square wave line-level audio signal (~2Vpp) that I hope to rectify in order to drive an infrared LED at 38kHz. So far, I've been using a pair of LEDs, wired in parallel in opposite ...
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615 views

Why Does LTSpice Always Show Negative Voltages in a Rectifier Circuit?

Rather new to electronics, I'm trying to design some of my first circuits. One of them includes a bridge rectifier feeding into an opamp used as a comparator. However, I'm a bit perplexed as to why ...
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2k views

What is the rectifier's role in this AC dimmer circuit?

Here is a typical AC dimmer circuit: http://www.eleccircuit.com/wp-content/uploads/2010/09/light-ac-dimmer-120watt.jpg I just came across another variant which uses a rectifier: http://www....
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bridge rectifier made with 1N5408

Again I Have a question regarding Bridge Rectifier's Made using 4 Diodes if I use 4 pieces of 1N5408 with rating of 3 amp in Bridge mode what will be current rating or handling capacity of rectifier ...
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1answer
65 views

How to calculate resistor needed between generator and bridge rectifier?

I am almost done with constructing my railgun however, I am stuck with this last problem. To charge my 110 V 35 mF capacitors, I am converting 120 V 30 amp AC current from a generator to a 120 V 10 ...
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413 views

Half bridge and full bridge control rectifier [closed]

Why do we use 2 SCRs and 2 diodes in a half bridge control rectifier and 4 SCRs in a full bridge control The image above shows a half bridge control rectifier Full bridge control rectifier replaces ...
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439 views

How to to Use a Nylon Shoulder Washer?

I'm somewhat curious as to how to use a nylon shoulder washer with a bolt. There is an example of this here (https://electronics.stackexchange.com/a/45579/95654), but I can't figure out how it would ...
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81 views

Why might a rectifier circuit not behave as expected?

I'm building a power supply for a guitar amp in order to replace the poor quality PS/amp circuit that it had initially. And after much deliberation and simulation this is what I designed: Output is ...
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2answers
595 views

Tactics for Controlling Heat in a High Current Bridge Rectifier?

I'm having trouble controlling the heat from running a bridge rectifier (Similar to http://www.amazon.com/1200V-Single-Bridge-Rectifier--QL100A1200V/dp/B00EZ8BUMU/ref=sr_1_2?ie=UTF8&qid=1459556648&...
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298 views

Differences Between Smoothed DC & Not Smoothed DC With Respect to Heating

Are there any significant differences with respect to heat generation of a bridge rectified circuit with smoothed DC by use of a capacitor vs one that just uses the raw absolute value of the sine wave?...
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6k views

Schottky barrier diode as a bridge rectifier?

I am building a linear power supply. I need a bridge rectifier and the diodes I currently have can only handle up to a maximum of 1 amp, but I need 4-5 amps. But I have a bunch of YG862C15R Schottky ...
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521 views

Questions about a basic power supply

What is the difference between the peak voltage and the rms voltage? In our country, the standard voltage in houses is 220V AC. Is it peak or rms? In the rectifier (I use full-wave bridge rectifier), ...
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582 views

12VAC to 12VDC Converter Requirements for RGB LED Controller

I have an outdoor lighting transformer (operating at the usual 12VAC) that I want to add a strip of LED lights in a new run. The transformer has two legs, each ...
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147 views

Full-wave rectification for clock signal from wall power

I have built this power supply and clock signal extractor exactly as shown: http://electronics.howstuffworks.com/gadgets/clocks-watches/digital-clock4.htm I have double-checked this and the rest of ...
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646 views

Diode Bridge Rectifier using Dual Schottkey Diode Bridge

I am trying to develop the first stage circuitry of a kinetic energy harvester from that is made using magnets and a coil. I attach a photo of the harvester taken during development. My intention is ...
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1k views

Reactive power in single phase controlled full wave bridge rectifier

How to calculate the reactive power,Q (VAR) in single phase controlled full wave bridge rectifier with only R-load? The sample observations of the experiment are given in the image. But I am wondering ...
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117 views

Full wave bridge rectifier

Where should the ground be placed in a full wave bridge rectifier ? I mean if the ground was placed at one end of the load resistor, then won't the other diode (which would be forward biased in one ...
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325 views

Is the Current of A Full Wave Bridge Rectifier Roughly Constant?

If I have a full wave bridge rectifier that produces pulsed DC output (without any type of filtering) is the current constant from the AC side to the DC side? In other words: if the input is .5A AC ...
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4answers
8k views

What size bridge rectifier do I need to convert 12V AC to 12V DC with 200watt load?

I have a 12V AC power supply that I want to convert to 12V DC using a bridge rectifier. I have LED lights that will draw up to 200 watts. By my calculations, that should be about 17 amps (200W/12V = ...
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118 views

PSU First stage with IRCL Voltage rails swapped

The image below shows the first stage of a power supply I am trying to design and build. The transformer is a toroidal type with two 18V coils on the secondary and a 230V winding on the primary. The ...
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246 views

Cascade voltage multiplier ground

I built a driver for a pulsed laser. This required a low voltage DC source to provide a bias current through the laser and also a high voltage DC source to drive an avalanche transistor to make the ...
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223 views

Where from the second half-wave of rectified voltage comes in full-wave rectification?

I know it may be sounds silly! But I can not figure out where from it comes - the second half-wave (let's say positive) in full-wave rectification. Is there any key to understand it? I mean: there is ...
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372 views

Bridge rectifier - min. required protective resistor

Looking at the datasheet for a MYS80 bridge rectifier, at the bottom it states Min. required protective resistor is 8 ohm. I could not find much information about a protective resistor in regard to ...
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2k views

Suitable Schottky (Dual) Bridge Rectifier ICs to protect stepper motor drivers

I need to protect a number of 24V stepper motor drivers from cable disconnects as described in "Adding diodes to easy driver stepper motor driver". This means using eight Schottky diodes with a ...
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1answer
274 views

Powering an LED with a 170VDC Full Bridge Rectifier

I am currently in the process of designing a Tesla Coil and am stuck at the Full Bridge Rectifier and have some reservations about what I propose to do. Currently, the circuit looks like this: I ...
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1answer
399 views

Small circuit board issue

Background of issue: I have a LED lamp with 2 different modes and an on/off switch for each of these. There is a fan that's supposed to be cooling off the LEDs but is not functioning in 1 of the modes,...
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diodes blow with no load on full wave bridge rectifier

I have built what I thought is a simple first stage for a power supply consisting of only the full wave bridge rectifier (made up of individual 3A SMD diodes) and bulk capacitance. The moment I apply ...
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565 views

impedance match with rectifier

I have a AC source with some serial resistance. To maximize power transfer, the load connect in series should be 40 ohms (its a voltage regulator). However it need to take a DC voltage rather then AC, ...
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3k views

Storing the charge from a MOSFET Bridge Rectifier

I am using the following MOSFET Bridge to harvest AC bursts, that come from an electromagnetic transducer. In front of this circuit is a supercapacitor I have added. I read the following on a ...
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1answer
3k views

Why is the ripple frequency in dc side of 3 phase full wave converter is considered to be 6 times that of ac side?

I can't find why is the ripple frequency in dc side of 3 phase full wave converter is considered to be 6 times that of ac side?
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411 views

In a simulator, outputing +/-5V peak AC through bridge rectifier then opamp buffer gives 5V DC output… software error or does this really happen?

In a circuit simulator I'm using it shows that if I run an AC voltage through a bridge rectifier and output that to a op amp buffer, the voltage at the input of the opamp (and hence the output) is the ...