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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54 views

Capacitive-load derating for bridge rectifier

I'm confused about the precise meaning of the derating info/graph for capacitive loads for the Visahy 2KBPxxM-M4. I get it that the current rating for capacitive loads is less than for resistive/...
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1k views

Importance of series resistor at output of Rectifier

For conversion of AC into pulsating DC we used Rectifiers circuits. But I read somewhere (from a well-known site) that the circuit does not work in ideal condition if I used my first circuit. The ...
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625 views

If you plug in a bridge rectifier directly to a power outlet, and touching one of the outputs, isn't it like touching live wire?

If you touch the output of the Full bridge Rectifier, and the circuit is powered directly from the city power, does it shock you with every positive wave of the 120ac? How about a half bridge ...
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44 views

inverter to rectifier [closed]

I'm putting together an experimental geo resistivity measuring device following vague instructions found on the internet. I was wondering if it is safe to connect a Mastervolt AC MASTER 12/500 ...
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334 views

Elevated voltage after a filtering capacitor

When the secondary coil of a power transformer provides 44V to each side of a bridge rectifier relative to the ground, i.e. 88V total, and I measure +53V and -63V after the rectifier on the filtering ...
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876 views

Average output voltage of single-phase thyristor-controlled bridge converter

This question is highly related to this one but I don't find the answers satisfying. I'm a bit confused about the equation for the DC output voltage of phase-controlled bridge rectifiers. \$V_{o_{...
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1k views

Replacing the selenium rectifier in a vintage car battery charger

My battery just died yesterday (actually left the lights on). Took it out for charging today but my new automatic charger for detect such low voltage to begin the charging process. So, I had to hook ...
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6k views

Bridge rectifier: 4 diodes vs. single chip?

I notice (among the DIY audio enthusiasts at least) that when it comes time to design a power supply for an amplifier, DAC or whatever that the parts list will inevitably include something like "4 x ...
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253 views

Choosing “pull down” resistors for automotive diode logic XOR gate

Thanks to some members on here I finally managed to understand how a bridge rectifier can be used as a diode logic XOR gate in an automotive application. Now I'm trying to figure out how to select the ...
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2k views

Help me understand XOR gate with diode logic [closed]

I'm generally a pretty smart person, but for some reason I can't get my head wrapped around this one. A little background - I have performed this function before using two diodes and two SPDT ...
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2answers
458 views

How do I bypass the ac rectifier in a guitar amp so I can power it directly with DC power source instead of mains?

I have a guitar amp that died recently, the primary coil of the transformer lacks continuity when tested with a multi-meter. I am trying to power it with a 9V power source instead of AC power outlet. ...
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1answer
544 views

Which one is the primary and secondary side of this Transformer

I found it on a old laptop charging adapter. I what to know the primary and secondary side of this transformer. It has total 8 pins. Each side has 4 pins
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220 views

Three Phase rectifier [closed]

I just bought a electric bike BLDC motor that i have to use as a DC generator, in order to charge a 12V battery. I have many questions, all related to this project but seeing it from quite different ...
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What is the name and purpose of the following component?

I'm trying to repair a small electronic door bell. I was wondering what is the name and purpose of the white box component ? It seems to be just a wire with some white body around. Is it a resistor ...
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2answers
369 views

Problem With Power Supply.?

I am using the following circuit to convert 230V AC into 12V and 3.3V DC.Here i am using a X rated capacitor instead of a transformer and i am taking 12V and 3.3V DC output from this circuit to power ...
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What seems to be the issue with this simple diode bridge rectifier with smooth capacitor?

I don't know if it is some limitation on the simulator, or my mistake, but I am trying to build this circuit: But this is what I get: For some reason, the voltage at the marker ...
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1answer
553 views

What is the function of these extra capacitors around the bridge rectifier?

I'm looking at different bridge rectifier circuits and found this one. Capacitors C5-C8 are smoothing capacitors. Both positive DC and negative DC have capacitors C1-C4 linking to both AC lines. What ...
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1answer
88 views

A problem regarding connecting the grounds within two seperate circuits

Figure 1 I am trying to design the above circuit for my project to create zero crossing detector as shown in the above figure. This configuration was proposed originally by the member named "...
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1k views

How to create a zero crossing detector using a full bridge wave rectified circuit

Currently 1) I have a full bridge wave rectified ac waveform of 10Vmax. 2) I also have a potentiometer adjustable DC waveform. 3) My rail voltages are +12V and -12V. 4) I currently supply my full ...
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4answers
2k views

Rectifier for two phases (220 V 50 Hz)

I have a switch circuit which works with two phases. I need a flyback SMPS power supply for my logic circuit. I want my control circuit to be alive if any or both phases are receiving power. This can ...
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5answers
3k views

Center tap transformer with full bridge rectifier, number of rectifiers

I have a center-tapped transformer which outputs 12V-0V-12V. I was wondering what is the differences between using one full bridge rectifier and two to generate a positive and a negative DC rail. ...
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3answers
2k views

Why E = (Vc + Vr) in a circuit with a capacitor and a resistor in series?

I want to understand how to think about a capacitor in an electrical circuit. Note: I'm looking for an explanation of the basics that would help me answer this question, not an advanced discussion of ...
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2answers
306 views

Split AC current from one wire into two wires (+ and - DC wires) using bridge rectifier [closed]

I am new and a novice. I apologize if this is a ridiculous question. I have a ground/bond wire coming from the Cable TV intersystem bonding bus bar that is carrying current and a lot of "noise" on it. ...
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5answers
2k views

capacitor power supply for 1 Amp output current

I'm trying to make a fairly small AC(220V) to DC convertor to power microcontrollers and some actuators. It needs to output a current of 1 amp to the load. I tried looking at using transformers, but ...
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1answer
551 views

Maximum forward voltage drop per bridge element at 4.0A dc

Can someone tell me what is the meaning of "Maximum forward voltage drop per bridge element at 4.0A dc is 1.1v" in 4 diode bridge rectifier? Does it mean that there is a voltage drop of 1.1v per ...
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106 views

Is the circuit a voltage doubler or not?

I'm not able to actually understand how the circuit behaves as a voltage doubler.From my understanding the circuit would behave as a voltage doubler if during the positive half cycle only D1 would ...
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3answers
476 views

What terminals of bridge rectifier to use, if I want it to behave as a high-current diode?

I have a 12V power source that can deliver 25A (DC). I intend to use something around 15A .. 20A on a circuit that includes a diode. However, I can't find a diode that can handle that much current, ...
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1answer
358 views

Problem in understanding bridge rectifier [closed]

Why does electricity not flow from the other two diodes after it has been through the load in a full wave bridge rectifier? I'd asked this question on Physics SE but was told to ask it here.
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1answer
4k views

220V AC to 220V DC rectifier bridge with Zener diode

I've made a rectifier bridge for converting 220V AC (supplied to mains in India) to 220V DC using 1N5408 Zener diode. Can you please tell me whether it will successfully work out? I will attach a ...
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4answers
206 views

Problem in understanding bridge rectifier

In a bridge rectifier (full wave) why do the electrons not flow from the other two diodes during a half cycle? Pls help me in understanding the concept.
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136 views

Given the diagram, where do I add/replace a larger capacitor for continued power while bike is stopped?

Following the circuit diagram, included as an image in this guide, where do I replace/add a larger capacitor for continued power while the bike is stopped? My guess is that it should replace the ...
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432 views

What happens to the load when a bridge rectifier is in over-voltage condition?

Please read carefully, this may or may not be trivial: Your bridge rectifier (Schottky diode based) is rated for 60 Volts Maximum Peak and the AC wave peaks at 65V for a short period of time. What ...
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3answers
545 views

Reverse engineering a power supply characteristics

I have this schematics and the following information: connect the + of the multimeter to test point A and the ...
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0answers
293 views

Bridge rectifier protective resistor selection

I have a device with a supply voltage range requirement 12-24AC. The B80S bridge rectifier I am using recommends a 3.5 Ohm series resistor to limit inrush to acceptable levels. Initially I decided to ...
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1answer
3k views

How to wire a three phase bridge rectifier

I am doing a DIY three phase AC motor power generation project. I can understand the basics of electronics, and also understand how the wires are wired in a single phase rectifier. However, for three ...
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1answer
314 views

Bipolar energy harvesting circuit

I'm planning an energy harvesting circuit using LTC3105 (400mA Step-Up DC/DC Converter with Maximum Power Point Control and 250mV Start-Up). The problem is that my energy source is bipolar, although ...
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1answer
644 views

Rectifier voltage drop under load

I have a bridge rectifier that is converting 240v AC into approx 358V DC The rectifier is smoothed by 2 X 10,000uf capacitors Under full load, I am drawing 3000 watts on the DC side but for some ...
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2answers
3k views

Full-wave rectifier with pi-filter

For a project I'm working on, I've to calculate a function for the output voltage of this filter: The things I calculate: The input voltage: $$\text{U}_{\text{in}}\left(t\right)=\hat{\text{u}}\sin\...
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2answers
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Can I use two bridge rectifiers to rectify 240 VAC split phase?

I have a bunch of bridge rectifiers rated at 25 Amps with a maximum input voltage of 140 VAC RMS. They work for fine for rectify the 120 VAC found from the wall in North America. Is it possible to ...
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2answers
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Full wave diode bridge rectifier troubleshooting

I am trying to make a full wave diode bridge rectifier, as the title suggests. I have a 120-12vac transformer that I'm using to supply the circuit. However, whenever I measure the voltage across the ...
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2answers
409 views

Does building an inexpensive bridge rectifier cheap flickering LED Christmas lights create safety concerns? [closed]

OK, I bit on Home Depot's door buster LED christmas lights... 150 LED lights for under $5 each. How could I resist? (Answer: By remembering that cheap LEDs flicker, AND that I'm sensitive to it. ) ...
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1answer
283 views

How much DC voltage is needed to brake a 3 triphasic motor?

What would the nominal parameters of the bridge rectifier and the transformer be?
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1answer
136 views

Circuit for slow windturbine 3-Phase

I have a little problem over here. Me and my friend wanted to make a low cost windturbine from scratch for our last school project, we have 24 magnets(size 40x10x4 mm) and 9 coils(1.4mm copperwire and ...
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3answers
792 views

What is the Best Way to Reduce High Power Three Phase Rectifier Ripple?

If a three-phase 220V AC @ 50Hz(three lines having 127V RMS voltage if measured to neutral each) mains supply is rectified with a standard 6-diode rectifier looks like this: I believe if 25 amps is ...
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1answer
364 views

240V AC to ~380V DC converter at 3500 continuous watts

I have a single phase 5KW generator connected to a diesel engine capable of producing approx 3500 Watts of power I need to convert the 240V AC to DC in order to send it to my solar charge controller ...
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1answer
218 views

Trigger a full bridge rectifier for pool chlorinator

The pool chlorination PCB controller packed it in. They want $300 for a board which switches a rectifier every day. That seemed steep, so I'm wanting to use an Arduino to do the job. The setup is a ...
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670 views

Why AC supply is rectified first before stepping voltage down?

I have opened one of my phone chargers and was trying to understand how it works.. I found IC MB6F just at AC input which came out to be a bridge rectifier. My question is why AC is first rectified ...
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2answers
806 views

Bridge rectifier & transformer to measure mains

So I am trying to use this circuit to read in voltages from the wall and input it into the Arduino Uno. Would an F-1X transformer work for this application?
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510 views

Separating Phase and Neutral in AC?

I need determine if a cable is connected to a wall-socket (230V) on the other end with a timer in-between. 230VAC---TIMER---CABLE Depending on how the timer is ...
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2answers
558 views

Full Bridge Rectifier with Filter Capacitor circuit

I have a problem where I have a 60 Hz sinusoidal power signal with an amplitude of 14.14 V through a full bridge rectifier with constant voltage modelled diodes (\$V_D = 0.7V\$) The load current is \$...