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
411 views

Smoothing cap vs filter for full wave bridge rectifier circuit

I am designing a circuit which requires high-voltage DC. My plan is to step-up my mains (120VAC) with a transformer and then pass that through a FWB. After the FWB, I want to smooth the signal into a ...
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3answers
153 views

Is a bigger resistor different from a smaller resistor with same color stripes?

I changed a resistor with same color stripes Yellow, Purple, Gold, Gold on a Pioneer surround system but the only difference was that the I put was a bit bigger. The problem is the system went into ...
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2answers
1k views

How do you calculate RC snubber values for a discrete bridge rectifier

I'm working on a small linear power supply for an audio amplifier (home/hobby use) and I want to add an RC snubber on the rectifier diodes. I know this might be overkill, but I'm looking at it as an ...
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1answer
183 views

Trying to understand floating voltage

I'm trying to understand the concept of a floated voltage, and why it is needed in some cases. For my own case, I am using a variac connected to a rectifier to provide a DC voltage for a circuit, (...
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2answers
394 views

How to solve a a full wave rectifier with two diodes and a ground in the middle?

This is the problem I am trying to follow along with the solution but I don't understand what is happening, how do I handle the random ground in the middle?? is the node between d1 and d2 40Vpeek and ...
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2answers
891 views

What is the purpose of grounding rectifiers?

In the centre tapped rectifier: It seems as if the highlighted ground line would provide a short circuit for any current developed between the top/bottom wires and the centre tap, eliminating any ...
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2answers
927 views

Output voltage of a rectifier

Is the output DC voltage of any rectifier (Halfwave, Fullwave or bridge) simply equal to \$\sqrt{2}\$ times Phase to neutral AC input voltage? Or does every rectifier circuit have its own formula to ...
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1answer
101 views

Why is waveform of the voltage across the DC-link capacitor alternating?

So I am connecting a full-wave rectifier to a half-bridge inverter as shown in the circuit below. I added a smoothing capacitor of 0.47 Farad to get a smooth DC output voltage (see the first graph), ...
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2answers
209 views

Diode Array for Full-Wave Rectifier for PoE

I was looking for SCHOTTKY diode for designing Full-Wave Rectifier for PoE. I was searching for the diode but came across the ...
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1answer
391 views

How is the voltage regulator functioning in this vintage charging circuit?

Attached is a simplified diagram of my motorcycle's charging circuit. It has a standard 3-phase bridge rectifier circuit--simple enough. I'm confused about two things: (1) How is the voltage ...
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2answers
100 views

Bridge rectifier filter capacitor remove

My question is very simple. What components should be removed from the following circuit diagram for this circuit to work only on DC voltage? I'm sure that the bridge rectifier should be removed ...
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2answers
57 views

how can accsess gnd in full wave rectifier? [closed]

in full wave rectifier without transformer how can access to gnd for regulator or gnd of microcontroller? (assume we dont have trouble with amplitude of voltage) I think in full wave rectifier in ...
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3answers
351 views

What is generic formula for min and max levels of rectified AC voltage?

For example, if i have 1 phase AC voltage with 1 volt peak level and rectify it., i would get some pulsating voltage V = abs(sin(t+0*pi)). Its minimum is 0 volts ...
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6answers
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
101 views

Building a High Voltage Rectifier with a continuous negative output

simulate this circuit – Schematic created using CircuitLab In the past, I have worked with high voltage projects, but seldom with HV rectifiers. Thus, I was curious how I could build a ...
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2answers
743 views

Full wave rectifier math analysis

I read some about a full wave rectifier on this website and when it got to the section of smoothing capacitor, and showed this graph and schematics: It was also said that: Here the 5uF capacitor ...
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1answer
77 views

Examine rectified voltage before and after

I built a simple bridge rectifier. simulate this circuit – Schematic created using CircuitLab I connected the output of the function generator with CH1 of my oscilloscope and with the input ...
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0answers
83 views

Output impedance function generator, limiting the current

I've the following schematic: simulate this circuit – Schematic created using CircuitLab Now the R of 50 ohm does limit the current that be supplied to the load. Is there a way to be ...
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1answer
49 views

Is it possible to charge/discharge this cap fast enough?

What I have, is a common 12-pulse rectifier with its bridges in series and I included a snubber between DC-link and rectifier output. Is important to note that all inductances before the rectifier are ...
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2answers
351 views

Converting 8-24 V AC into 3.3v DC

I have a circuit running an ESP-12 at 3.3v DC that I would like to power with a doorbell transformer that will deliver between 8 and 24v AC. I was wondering what would be the best way to do that. I'm ...
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1answer
531 views

RC snubber on bridge rectifier (capacitor rating)

I am using a bridge rectifier on the mains and across each diode I have placed a RC snubber for EMI mitigation. (C is rated at 1Kv) My question is...on the C (from the RC snubber) should I use Y or X ...
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1answer
37 views

What would be involved in rectifying electricity from a faulty car alternator?

Disclaimer: Newbe As I understand things: a car "alternator" generates a/c current the alternator contains diodes that rectify the current to d/c current if one or more diodes fail then the ...
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1answer
193 views

IGBT Rectifier Gate Voltage

I have a 3-phase bridge rectifier which uses IGBT's shown in the image below. The circuit works perfectly and the voltage on the output (unfiltered) is exactly as expected. However the gates are ...
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3answers
906 views

Why Does DC Load Draw Twice As Much AC Current Through Transformer?

I have designed the following circuit, comprised of 4 loads, 1 of 4.2ohms and 3 of 21ohms, drawing a total of 2.4Arms (1.5A, 300mA, 300mA and 300mA respectively) of AC current through the secondary of ...
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2answers
215 views

Why should I specify a 'pulse width' when firing a thyristor rectifier/inverter?

If I'm correct, the controller will send a gate signal to this bridge (6-pulse or 12-pulse) and even if it sends them with 1 degree of width, the thyristors must close until the current through it ...
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1answer
424 views

Measuring an AC-voltage at the ouput of a full bridge rectifier

I've a full bridge rectifier and I put the following function into it: $$5\sin(100\pi t)\tag1$$ So, at the output I get: $$\left|(5-2V_d)\sin(100\pi t)\right|\tag2$$ Where \$V_d\$ is the voltage ...
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1answer
56 views

Need help with high voltage rectification

I have a necessity to implement a bridge rectifier, the bridge will be fed from residential power, stepped up with a transformer at 409Vac rms @ 8amps. The power will be used continually and not in a ...
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3answers
1k 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
239 views

Is there any relation between the input and output of bridge rectifier that can explain this sentence?

Energy can be extracted independently of the excitation type and frequency, as long as \$V_p\$ exceeds the output buffer voltage \$V_{buf}\$,I am not understand what does this sentence mean,it seems ...
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2answers
346 views

Smoothing capacitor for scooter regulator - High constant current drawn

I've researched the forum before posting, but it seems my question is a bit specific and not answered before. Please excuse me if I'm wrong. So what we have here is a chinese scooter alternator, ...
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1answer
400 views

LTSpice arbitrary voltage block (bv) simulating full wave bridge rectifier

I'm creating a LTSpice simulation. I need a voltage source that looks like the output of a full wave bridge rectifier. The simulation includes a sine voltage source (voltage block) line to generate ...
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1answer
110 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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1answer
81 views

Does using electronics with poor power factor affect the pulse power capability of a generator rated for a certain KVA?

The situation is such: There is a multi-pole, three-phase, permanent magnet generator (rated for 100 KVA, let's say) that feeds into a simple diode rectifier with a capacitive/DC Voltage load (...
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2answers
287 views

Tesla free energy collector

I'm trying to see how this circuit works: This is taken from http://www.instructables.com/id/TESLA-FREE-ENERGY-COLLECTOR/. I tried the circuit with 1n4148 diode and I can see a voltage on the ...
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1answer
1k views

3-phase 200Vac rectifier output voltage

I was studying about 3-phase power supplies. After going through several searches, i found this formula of three phase bridge rectifier's output voltage: Vdc = ( 3 x sqrt(2)/pi ) x Vrms Vdc = 1.35 x ...
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1answer
173 views

Bridge rectifier simulation problem

I use virtuoso cadence to make two bridge rectifier,one of them use NMOS to replace the diode,and the other use DION_MM directly,like the picture shown But their simulation are wrong,like the picture ...
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1answer
183 views

How the voltage stable mechanism work in Bridge rectifier?

We all know that the purpose of Bridge rectifier is to change the AC to DC,and the picture below is my assumption,and as i know ,the Q1, Q2, D2 and the first level RC circuit are the filter and ...
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1answer
2k views

Bridge rectifier output higher than input

I have an electromagnetic dc brake rated at 110 Vdc. When voltage is applied, the brake is on. The main power source is 380Vac which is connected to a step down transformer with 110 Vac output. The ...
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3answers
1k views

Full Wave Bridge Rectifier vs.centre tap rectifier

Why does the DC output in bridge rectifier higher than centre tap rectifier.
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1answer
117 views

Understanding 1N5400 series datasheet [closed]

I am using 1N5408 diode in a rectifier circuit. The datasheet can be found here. I find myself in a very bad state while understanding symbols and meanings while reading datasheets. Can anyone have a ...
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0answers
278 views

What's wrong with my input circuit? LTspice

I am designing my first power electronics board in LTspice to convert single phase AC to DC. This DC is fed to asymmetric bridge to drive an SR motor which is connected to a flywheel. This flywheel ...
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1answer
1k views

How to calculate Fundamental Input Power Factor

I am really confused with the concept of fundamental input factor. What was taught to me in class was the below formula IPF(Input Power Factor) = IDF(Input Displacement Factor) x CDF (Current ...
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1answer
844 views

Bridge rectifier with no load draws too much current

I have a circuit that includes a bridge rectifier and a transformer. Values are, Transformer secondary 4.7v x 2 9.4v AC Diodes 1n5408 (3A Rectified Output Current) Rectifier connections are right ...
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2answers
345 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
184 views

Uncontrolled Bridge Rectifier

I am getting wrong answer for the above problem. My book says R should be 23ohms. Please guide me where I am doing the mistake.
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2answers
598 views

what should be the reverse voltage of diode

In AC/DC converter using 240V/12V step down transformer,the diode used for rectification should have reverse voltage of more than 12v. what should be the diode reverse voltage,if it should rectify ...
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3answers
602 views

Can anybody explain the heat produced in the circuit during operating and non-operating state

I have designed motor monitoring circuit(Agricultural Purpose) with Stepdown transformer, Rectifier, Relay Module, and processor.I planned to run the module to run 24*7 but I afride that heat will ...
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2answers
2k views

Can somebody explain why normal diode(1N4001 or 1N4007) is used in rectifier bridge insteed of schottky diode

I have 9v AC(1A, 50Hz) as input to 5v DC(500mA) as output rectifier circuit to power up the development board. But I had a doubt if I use Schottky diode instead of normal diode what happens to the ...
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0answers
314 views

RC snubber on mains connected bridge rectifier

I am designing a SMPS (90-230V) that has a bridge rectifier connected to the mains (of course after x2 capacitor and common mode choke). We need this SMPS not to pollute with noise the mains , so we ...
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1answer
926 views

Use RMS or peak value of current for transformer selection

I'm going to make 12V DC power source for my project, using a transformer (230V AC to 15V AC) and full wave bridge rectifier, followed by LM7812. The load will be 200mA DC. This is the simulation ...