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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1answer
35 views

PSRR of buck converter (or boost)

I want to design a power supply based on a line frequency transformer (50 Hz in my case), and provide a stabilized voltage (15 V) after the rectifier (a classic bridge rectifier with tank capacitor). ...
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1answer
22 views

Commutation and Triggering Angle

I have circuit to analyze like that L = 5mH Vs = 230V (RMS) Iload = 10A Constant Vda = 100V I should calculate commutation(u) and triggering angle but not known both. I tried to find both by ...
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44 views

AC to DC signal to drive a MOSFET

I need to intercept a 220V AC line to drive a 3.3v MOSFET that activates (for example) an LED. Looking around, a solution could be to use an AC/DC converter but they are meant for powering (so mostly ...
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1answer
102 views

Rectified 230VAC to 24VDC

I am building a simple motor control application, driving a series wound motor that runs on rectified 230VAC. Originally, it was controlled by a pendant switch connected to a 7 pin connector. The idea ...
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1answer
27 views

Using a dual winding transformer to provide dual winding AC and DC of a single winding

Ok, this feels like a stupid question, but my google-fu is not with me today. I have an application in which I have a need for both 12V DC (or thereabout) and 24V AC. I have a transformer that has two ...
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6answers
2k views

Bridge rectifier: What is the purpose of these two elements?

I found the following circuit in a random video (don't know what it's worth) and have two questions about it. I get that it's a full wave rectifier, and I think I have a decent idea on how it works. ...
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1answer
94 views

Bridge rectifier low voltage

Power supply for headphone tube amp gives me 10-12V lower voltage comparing to the schematic (my measurements are in red for amp under load). Current under load is about 70 mA. Using simple formula : ...
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0answers
86 views

Bridger rectifier producing non-equal voltages

I am making a bi-polar 12V power supply with a centre tapped (12-0-12) AC transformer. On inspecting the voltages after the bridge rectifier (KBU-4B), the negative side produces -26V and the positive ...
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46 views

Bridge rectifier overheating

I bought a cheap LED strip with a power supply unit from Aliexpress. After using it for some time I noticed that PSU is overheating in one spot to the point where the label looks burned. I opened it ...
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1answer
51 views

Full bridge rectifier - in depth explanation

Most explanations of full wave bridge rectifiers start off with a diagram like the one below, and then go on about what will happen on the positive and negative cycle of the AC input voltage. This is ...
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29 views

Will Paralleling Bridge rectifiers reduce heat in each rectifier?

So I'm converting an old AC stick welder that only outputs 30 amps into a DC stick welder. I purchased 1000 volt 50 amp Bridge rectifier to do the job but I got two because I thought I might screw one ...
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2answers
106 views

How to smooth fluctuating DC from transformer?

For an audio amplifier, I designed an AC to DC (220v to 12V 2A) power circuit like this: simulate this circuit – Schematic created using CircuitLab When I powered my amplifier with the circuit ...
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1answer
110 views

Full wave bridge rectifier: Does the capacitor “widen” the input voltage?

I am learning some basic electronics, and I'm trying to wrap my mind around some measurements I made on a full wave bridge rectifier. Using my oscilloscope (grounded) and an isolation transformer to &...
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4answers
129 views

Are there bridge rectifier chips that work at 40 kHz?

As part of a circuit handling signals from a sound receiver, I'm apparently in need of a bridge rectifier that works at a frequency of 40 kHz. I came across this thread talking about how most are only ...
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1answer
49 views

Transforming bike dynamo output to reduce diode bridge loss ratio

I'd like to use a standard 6v/3w bike bottle dynamo to power a 18650 battery charging module TP4056 which also powers some LED's. Diode bridge rectifier steals 1.4v from the generator. In addition to ...
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34 views

General formula for efficiency of bridge rectifier

Is there a general formula for the efficiency of a bridge rectifier ? I have seen a lot of efficiency curve like in the picture attached, but how should I calculate the efficiency of the rectifier ...
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0answers
15 views

Db107s bridge rectifier

I have a circuit from a dehumidifier. It has a db107s bridge on it. I tested the ac voltage in @240v but the output is dc @335v - is this normal or could it have something else connected which is ...
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4answers
233 views

Strange failure on bridge rectifier

I've build this circuit (that will be part of a more complex circuit): All works as expected and on the zener I have exactly 15 V rectified. Later, one day after, I've discovered that even with the ...
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1answer
60 views

Battery charger DIY

Can I use 220-12 V, 1.5 A stepdown transformer along with 12 V 2 A (KBP200) bridge rectifier to build a charger for 12 V, 7.5 Ah battery or should I use transformer with higher output, maybe 15 V?
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1answer
234 views

Converting DC Motor's Tachometer Output to DC Using Bridge Rectifier

I have a DC motor that its specification states that "Electric DC motor manufactured by Buehler. Sinusoidal Encoder Output: 11.5 VAC - 870 Hz @ 12 VDC input. No load speed: 6800 RPM. Runs in either ...
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4answers
128 views

Is it possible to reverse the polarity of DC using diodes?

From my humble understanding of a bridge rectifier, it "flips over" the negative cycles of AC, turning it into DC. Is it possible to modify this circuit so it can be used to reverse the ...
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1answer
59 views

Live only circuit with 3 loads

Please advice how to design one transformer using full-wave bridge rectifier to control separately for 3 loads. This design is Live only circuit,no ground and neutral. Do i need more of bridge ...
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2answers
224 views

How to get rid of floating voltage on Bridge rectifier

I'm trying to implement a rectifier and AC voltage sensor. The rectifier part works just fine. I'm able to power my device without any issues. Please look at C2 in the screenshot (Circuit schematic)....
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3answers
90 views

How do I calculate the real power curve of a PWM resistive load supplied by rectified AC?

When AC is put through a capacitor filtered full wave rectifier, the output voltage is ~1.414 x RMS input voltage for zero load, and nominally equivalent to the RMS voltage when connected to a pure ...
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2answers
54 views

ADS Simulation of Half-Wave Rectifier

I’m trying to simulate a half wave rectifier for a -84dBm 2.4GHz AC signal. The rectifier doesn’t seem to be giving me the correct waveform - the negative half cycle isn’t blocked? Also sort of ...
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1answer
48 views

Which is better for full bridge rectifier circuit? MLCC or Electrolytic? [duplicate]

If I place 100uF multilayer ceramic capacitors at the output of a full-bridge rectifier will there be any problem? Or I need to place electrolytic capacitors? What difference do they make (except size)...
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10 views

Max voltage per thyristor in 3phase thyristor full bridge rectifier when Iout is DC

I was wondering: Suppose we have a circuit as the title states where $$\omega L >>R, (L\rightarrow \infty) $$ ). So the output current $$I_{out}$$,is considered a DC one. My book says that the ...
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2answers
93 views

Universal series motor control using relays

I have a 220AC universal series wound motor I am trying to connect to a RF Remote Switch using relays and full bridge rectifiers. I have come up with the following schematic: The RF Remote Switch ...
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1answer
875 views

Designing MOSFET bridge rectifiers for high voltages

I've been looking into MOSFET bridge rectifiers, also known as "zero IQ" rectifiers, as a replacement for traditional diode-based bridge rectifiers. Here's a simple example: The benefit, of course, ...
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2answers
401 views

230VAC to 230VDC converter for flicker free LED construction lights for use in videography/photography

We use LED construction lights for illuminating a photo or video set. As espected the lights flicker with the mains frequency. While in some cases this can be compensated with the right camerasettings ...
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2answers
785 views

Why does diode keep conducting even after voltage across it is negative

consider single phase two pulse semiconverter asymmetric configuration. simulate this circuit – Schematic created using CircuitLab Note the high value of inductance L1. Let ...
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1answer
85 views

For a full wave bridge rectifier, why does the oscilloscope does not show the rectified voltage in negative cycle?

I was trying to do a simple full bridge rectification. There is a strange problem. The oscilloscope does not show the rectified waveform in the negative cycle. The input is applied from a Keysight ...
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3answers
3k views

Why am I getting a half-wave rectified output when i am using a full-wave rectifier?

I have recently gotten back into electronics and have access to a lab with a signal generator and oscilloscope. I have been trying to teach myself how to use this equipment by building small and ...
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2answers
106 views

Sharing ground between two fully bridge rectified AC signals

I am designing a device which has two AC input signals. The Input signals are as follows. A - AC Signal A B - AC Signal B Com - Shared Neutral for above inputs ...
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1answer
1k views

What can I use to supply 220V DC to this motor?

I have a small 220VDC motor I would like to drive via a speed controller, so I can continuously adjust the speed. I'm in Australia with 240V mains, and I also have an adjustable 0-220V AC controller. ...
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1answer
491 views

Rectifiers in parallel - mosfet

I see the question has been asked a few times about using rectifiers in parallel to get a higher current rating and this is not advisable however I wanted to ask how this would apply to a active ...
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1answer
191 views

What does PA1 do in this schematic?

Original document:http://www.st.com/content/ccc/resource/technical/document/data_brief/group0/95/79/2a/ed/d0/a0/4f/46/DM00263698/files/DM00263698.pdf/jcr:content/translations/en.DM00263698.pdf The ...
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3answers
573 views

Wiring a transformer with two primary windings

I'm building a circuit that involves the use of multiple transformers. I've mainly used transformers that had one primary and one or two secondary windings. However, this time, the transformer I'm ...
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1answer
69 views

Are vias underneath a SMD component without a thermal pad useful for cooling?

I want to cool this bridge rectifier from Diotec in my circuit to minimize radiated heat by placing a small copper area directly underneath it and connect it to a larger copper area on the opposite ...
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1answer
32 views

Common Ground across SCR and Diode Bridge

I am trying to use a common ground to enable a regulated output across the circuit, however as you can see the SCRs and Bridge use the common earth to relay the positive channel in the bus.. Is this ...
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3answers
116 views

What is the reason the output signal I obtained from full-wave bridge rectifier has changing amplitude?

I observed the output signal of full-wave bridge rectifier sending sine wave and square wave for an experiment. In both of the output signals it is clear that each cycle shows one of the two different ...
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2answers
106 views

How to select the best diode for a full-wave diode rectifier which gives the most efficiency and minimal power loss

I want to make a bridge rectifier that can convert 230 VRMS 50Hz AC into fully rectified DC, but I don't know what particular diode to use for my circuit. In particular, I want to use Schottky diodes ...
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0answers
19 views

3ph diode-rectifier with RL load : non - active power

I am studying this circuit. In my book there is an open question about reactive power Q in input in cases 1) L=0 and 2) L=oo Well I do know that Q(Var) occurs when there is phase difference between ...
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0answers
57 views

Weird output voltage from smps

I just completed a half bridge smps and had a test run. The series bulb on input just blink for a second at first and then shut down at it should. But the output voltage is quite weird because my ...
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2answers
44 views

Frequencies of current harmonics 1 phase diode bridge rectifier

I was wondering what would be the frequency of the current harmonics at the input of a 1phase diode bridge rectifier. My believe is that it should be 60Hz for Is1, 180Hz for Is3, essentially every ...
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2answers
208 views

Regulated multi-voltage PSU given a center-tapped transformer and a single regulator/zener

My first post here, sorry in advance if this question has already been covered. Being a computer scientist, my knowledge about electronics is limited, never had a formal education, a couple of courses ...
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7answers
2k views

Bridge Rectifier Fails When AC Inputs are Shorted

I am working on a design that involves powering a 3.3V microcontroller off a doorbell transformer but I am running into an issue with the bridge rectifier failing when the AC inputs to the rectifier ...
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1answer
47 views

Is the voltage on the resistor always low when the zener diode is not in reverse operating region?

I´ve read that the zener diodes are used for voltage regulation, and the resistor in this circuit limits the current through the diode and drops the excess voltage when the diode is conducting. Does ...
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1answer
121 views

Why is there a LC filter in front of the DC/DC converter?

I have to study this circuit. I understand that Graetz's bridge is there to convert the current to positive, but why is there a LC filter at the entrance of the converter?
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96 views

Behavioural Voltage

If I directly connect it to the power stages in a midstage model from an output of a rectifier, the rectification seems off. If I add it to the power stage using a Behavioural Voltage, it seems smooth ...

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