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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What heat sink should I use for silicon rectifier that is replacing selenium rectifier in a TIG welder?

This is the new rectifier. I could run some tests, I have no idea how much load would be a lot for this or what kind of cooling it would require. Here's the wiring diagram: Not sure what kind of ...
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8 votes
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Why does a full-wave bridge rectifier have noisy output with no load?

Purely academic question: I have a little bridge rectifier made out of four 1N4001 diodes, being fed by a transformer putting out 12VAC. When I run it without anything else attached to it, the ...
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How to get stable current from three-phase alternating? [closed]

I have this generator. How can I convert a three-phase AC voltage into a DC voltage? I know that I can use a diode bridge to rectify the voltage, but how can I use it with a three-phase generator?
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What are the assumptions involved in below rectifier output waveform?

The below waveform shows peak current occurs at the instant when diode starts conduction. Why is the peak current not happening at the max input voltage point? Usually the rectifier output caps are ...
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Bridge Rectifier Problem or something else?

I am designing a 30V 5A power supply and after simulations working fine I decided to make it on actual hardware. But during the first run, something shorted and the power supply didn't even turn on. ...
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Full wave active rectification for lower voltages?

I have been following these youtube tutorials on active rectification to learn more about the topic. https://www.youtube.com/watch?v=VR456CsHYx4 https://www.youtube.com/watch?v=arvNukW-jeo I simulated ...
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How to teach about bridge rectifiers with an oscilloscope and a function generator? [duplicate]

I'm trying, for teaching purpose, to study the behaviour of a bridge rectifier. When I've simulated it with Multisim, all has work as expected: I built a real circuit with a function generator and an ...
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Why aren't smoothing capacitors used in smoothing the output of fully controlled bridge rectifiers?

I was wondering why smoothing capacitors are not used in smoothing the output of fully controlled bridge rectifiers, like it is used in the uncontrolled bridge rectifiers.
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6 answers
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Is full wave rectified AC, without a smoothing capacitor, okay for switching a DC solenoid and a DC relay?

I have a circuit where the 24V AC secondary voltage of a transformer is full wave rectified to DC. The only parts that this circuit is connected are some 24VDC solenoids and a 24VDC relay. The ...
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Rectify 250A using multiple bridge rectifier

Need to rectify 3 phase 120V AC 250A using 3 Phase 200A bridge rectifier. Details: Input Voltage: 120V AC 3 Phase Input Current: 250A Problem: Only 3 Phase 200A bridge rectifier is available. Is this ...
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Which is better, the MB10S or the MB10F?

I am replacing a blown MB10 rectifier IC on a small LED power supply. The letter could not be read anymore so I don't know which one to get. The S or the F variant. In the datasheet the electrical ...
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Which replacement standard recovery diodes do I use for a high voltage full bridge rectifier in a valve guitar amplifier?

The original diodes were four IN4007 (1A 1000V PRRV.) If I replace them with IN5408RGL (STANDARD DIODE, 3A, 1KV PRRV,) basically upping the current to 3A, will this have any detrimental effect on the ...
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3 votes
3 answers
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Not able to figure out the logic behind sense circuitry of a AC/DC converter

In the below circuit, why would there be 2 extra diodes (D3 and D4) to sense AC input voltage? If D3 and D4 act as rectifier, wouldn't it be sufficient to directly sense at the output of bridge ...
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Detect stepper motor rotation - connect bridge rectifier to motor driving wires

As a follow up to my previous question. I want to develop a small circuit, which can detect, if a stepper motor is driven. After checking all options/provided as answers, I decided, that probably the ...
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How to mathematically choose values for a pi filter without knowing the cutoff frequency?

I am trying to design an AC to DC converter. After the rectifier, I have a pi filter. I need to calculate my L and C values, but I don't know what the cutoff frequency is/how to find it! Any help is ...
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What happens if you feed DC into a bridge rectifier?

If I feed DC into a bridge rectifier, it still outputs DC right? Also, it seems like it should provide make the inputs DC polarity agnostic, right? I'm asking because a friend has a programable timer/...
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Transformer is not essential in half wave rectifier

My textbook for basic electronics states that Transformer is not essential in half wave rectifier (advantage of half wave rectifier)... But why? And there's another statement saying that half wave ...
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2 answers
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How is the peak inverse voltage of diodes in a center tapped rectifier twice than the bridge?

I am not able to understand how the PIV becomes twice in case of centre-tapped rectifier. PIV is the maximum inverse voltage that a diode can handle before having a breakdown. For a half wave ...
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4 votes
3 answers
583 views

Double Bridge-Rectifier Circuit Question

I am up to building a NE555 controlled PWM circuit that will power a 220v heater. NE555 will use a typical configuration and will drive a 20N60 Mosfet. The mosfet Vgs(th) is 10v, so NE555 needs to be ...
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3 votes
5 answers
1k views

Can a diode bridge be connected to a high input voltage?

I'm trying to rectify an AC current at 220V. Many written tutorials don't mention any transformer before the diode bridge and many video tutorials use transformers that provide an output of 6V or more....
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How to rectify and smooth a high frequency sinewave

I'm working on an experiment that generates a high frequency sinewave using an air core transformer. How can I rectify and smoothen this high frequency sinewave because most of the high current ...
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Can lithium battery be charged with rectified AC?

If AC is rectified to make it to only positive AC, can it charge batteries without damaging them? If no, then how regenerative braking works in electric vehicles? Does every motor controller have big ...
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2 answers
232 views

Why does placing multiple bridge rectifiers in parallel reduce the voltage drop?

I noticed when you start running these KBP310 bridge rectifiers in parallel the Vf goes down. From 0.998 V for 1 to 0.900 V for X4 bridge rectifiers together. Why would that be? Also, I was thinking ...
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Graetz diode bridge with series LC circuit oscillation problem

I am trying to understand a problem I have encountered. I simulated the voltages on a Graetz diode bridge with a step voltage input of 24 volts. The schematic and the voltage signals are given below. ...
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2 votes
3 answers
153 views

X2 polypropylene capacitor for DC smoothing after AC rectification

Can a X2 polypropylene film capacitor be used for dc smoothing at the output of a bridge rectifier? I want to use this capacitor at the input of a power factor correction circuit with a switching ...
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2 answers
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Bridge rectifier & minimum diode voltage

The varying input voltage to a bridge rectifier spends a certain amount of time between +0.7V and 0V, as well as between -0.7V and 0V, during which there is not enough voltage across any diode to ...
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1 answer
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Matching rectifier with inverter

I'm trying to make a DIY wind turbine generator from a 3ph squirrel-cage induction motor but I'm having trouble matching the generator with the rectifier with the inverter. I'm not sure which ...
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2 votes
2 answers
310 views

How much current can be drawn from 1N4007 based bridge rectifier

I am not an electronics expert. Hence little confused with the current rating of 1N4007 diode. I know it's rated for 1 Amp and 1000 V. But I want to use 4 of them in a bridge rectifier circuit which ...
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1 answer
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Flashing LED String/Christmas lights to steady on [closed]

I want to bypass the 8 function EK-04 controller( pictured below) and keep lights stay on. There is a post similar to this but it has the old design. Bypassing a multi function Christmas light string ...
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1 answer
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Circuit to convert a pulse signal to square wave

How can I convert a pulse signal into a square wave. I have a pulse signal created using a Function Signal Generator, ZK-PP2K Pulse Frequency Generator 8A Driver Module LCD Pulse Frequency Cycle ...
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2 answers
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LTspice diode bridge rectifier input oscillating

I've made a LTspice model of a diode bridge rectifier, but when I simulate my circuit, the input voltage is oscillating. Here is my schematic, along with the simulation result of the voltage at node 3 ...
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1 vote
0 answers
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Diode and capacitor circuit after diode rectifier. Why?

I came across this design. Basically, it's a rectified power supply that is used to power a big coil. The coil is connected beetween B1 and gnd. My concern is about the diode D2 in series with C27. ...
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1 answer
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What is a full-wave bridge rectifier with capacitor filter and voltage divider? [closed]

What is a full-wave bridge rectifier with capacitor filter and voltage divider? Just a simple definition and an example will do.
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1 answer
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Help with Logo identification on bridge rectifier

I am trying to identify this bridge rectifier. It is on a control board for a horizontal saw. It is between the single phase 80 VA step down transformer 26 V output and the logic circuit. There is ...
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3 votes
2 answers
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Why do we use thyristors instead of regular diodes for high voltage direct current?

Usually, power lines over large distances use alternating current (AC). However, in some cases, direct current (DC) is also used, as high voltage direct current (HVDC), where the high voltage is used ...
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1 vote
1 answer
274 views

How to calculate current RMS value for full-wave controlled rectifier in degrees?

I'm trying to find the clear way to calculate the current RMS value for full-wave controlled rectifier. Should I include the pi value if the calculation is in degrees since the trigger angle is in ...
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1 answer
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SCR bridge control circuit

I want to design a single phase 400V 1A power supply using mains (230VAC,50Hz). For which I plan to use a step up transformer which will step up to 400V and then an SCR Bridge rectifier to convert it ...
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2 votes
3 answers
155 views

How do bicolor LEDs switch colors?

I recently purchased a decorative light with two different bicolor LEDs connected in alternating series fashion. It has red/green and red/blue LEDs connected in alternating series On the driver side ...
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-1 votes
2 answers
121 views

How to get +- 400 volt DC from two sources?

I tried two rectifiers in series. From 230V AC I get on each rectifier 207V DC. If I linked them in series + to - it seems to me that the direct current flows into the AC supply. How can I configure ...
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9 votes
4 answers
2k views

Installing heatsink on a bridge rectifier: which side of the rectifier should it be installed on?

I'm going to install a heatsink on a KBU810 bridge rectifier. As the picture shows, the leads are closer the face with markings on it. I wonder if one of the two faces is the preferred site for ...
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Identifying the manufacturer and specifications of W06M bridge rectifier

I've got a PCB containing the below-presented bridge rectifier. I searched for "W06M" however several parts with the same part number, but from different manufacturers, were displayed to me. ...
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1 vote
2 answers
160 views

Determining the RMS current of diode of a 3 phase rectifier bridge with a filter capacitor and a load

I would like to know if it possible to determine the RMS current through a diode of a 3 phase rectifier. Here is the simulation. I was looking if I could neglect the effet of the smoothing capacitor ...
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2 votes
1 answer
146 views

Transformer with 5 secondary taps, is the connections correct?

I have a transformer with five taps on the secondary, one wire (black) is the common to four wires: blue green black green blue 30 15 0 15 30 Is the diagram below correct? simulate this circuit &...
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1 answer
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How to calculate the real output voltage of a rectifier circuit (center tapped rectifier)

In my class, we are using Proteus 8 to simulate simple rectifier circuits. We are not familiar with analog electronics yet. Since the class is all about using engineering software, there are not many ...
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1 answer
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Current flow in full wave bridge rectifier during negative half wave

I was watching a video on full wave bridge rectifiers and was wondering why the current flows in the direction of the green arrow (+ to point C) during the negative half wave, instead of going in the ...
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0 votes
1 answer
138 views

Stop string lights from flickering

I am converting white LED Christmas lights (outdoor rated) into over head outdoor lighting. The box says I can connect up to 45 strings. I will only need about 10. Since they flicker, I made a ...
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0 votes
1 answer
94 views

AC to DC conversion, how to keep the voltage same?

I have an amplifier board. The maximum input voltage is -40V 0 +40V DC. I have a 30V 0 30V 5 amp transformer. When I read the DC voltage after rectification, it shows around -45V 0 +45V. So what is ...
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0 votes
1 answer
58 views

Change DC motor direction with rectified voltage

I'm working with the following circuit: It has a DC motor. The VDC can be changed by controlling the thyristor turn on angle. I would like to add a switch to also change the DC motor direction, but I'...
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Issue with Single Phase to Single Phase Cyclo converter Circuit

I am new at this forum. I am trying to make a circuit for single phase to single-phase cyclo converter. Using Pic Micro Controller for Triggering Gate of Trails. Triac -> BT151 Optocoupler -> ...
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0 votes
3 answers
236 views

Is it normal to have 0 volts between the AC inputs of diode bridge rectifier?

I have some basic knowledge about electronics. I am trying to repair an ATX 250W power supply. In the picture below, I measured 0V with my DMM between points C and D (AC inputs of diode bridge ...
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