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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How can I connect multiple 8V AC inputs into one earthed probe?

I am trying to design circuitry to connect 4 separate float-less water level controllers into one probe. Each unit needs to confirm that there is water in the tank and if not, will shut down. Not all ...
-2 votes
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capacitance value formula for 3 phase rectified output [closed]

input line to line voltage=55V ac rectified output=74V dc allowable ripple voltage=2 V(2%)
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Question about n channel mosfet as a switch(simulink/ simscape electrical)

i have to implement the following circuit which is an energy harvester circuit using simscape electrical. The description of the circuit is this one found on page 7 of the pdf at Finite element-based ...
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1 answer
83 views

An upgrade of a simple welder

I've been needing to get some welding projects done, but am reluctant to cough up $800 or more for a TIG & stick combo welder. However, I have an old simple buzz box welder (basically an oversized ...
1 vote
3 answers
451 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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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 ...
1 vote
2 answers
545 views

Converting DC motor's tachometer output to DC using bridge rectifier

I have a DC motor, its specification states: "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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2 answers
356 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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Isolated digital input for large variable input voltage (12-240)

In industrial applications, relays are used to send the signal to other parts and machinery. They switch 24 DC and 220 AC on, off signal. Although there are plenty of circuits to read input signals, I ...
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1 answer
253 views

How to use measured values to obtain an experimental ripple factor for a full wave bridge rectifier with no filter

Hello this is my first post. This is my thought process: I can use the following equations to calculate the theoretical ripple factor for a full wave rectifier: Through simplifying, it can be ...
2 votes
2 answers
1k views

Function of capacitor on the output of a bridge rectifier

What is the function of capacitor C in this diagram?
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1 answer
487 views

Commutation and triggering angle

I have circuit to analyze like this: L = 5 mH Vs = 230 V (RMS) Iload = 10 A constant Vda = 100 V I should calculate commutation (u) and the triggering angle but both are unknown. I tried to find ...
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1 answer
55 views

Ground connections around bridge rectifier in flyback converter

I am designing a flyback converter and I am being told to make the ground net connections as shown in the image below. I think this is colossally dumb because it eliminates PRI and SEC isolation. I ...
2 votes
2 answers
130 views

What is a bridge rectifier doing in this TRIAC regulator?

Recently I purchased a TRIAC-based mains regulator and took a look inside. It's a very typical TRIAC regulator, except it contains a bridge rectifier (DB207S), the purpose of which is not clear to me ...
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3 answers
416 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 ...
9 votes
4 answers
3k 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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Are Bridge AC to DC Rectifiers using thyristors still considered Linear Rectifiers considering their switching mechanism of action?

While I tried not to make the title confusing, Whether if the question is about Non-Linear/Linear PSUs or just the Rectifier circuits, I believe This one covers both matters. Considering that the ...
1 vote
1 answer
481 views

Switching from full to half wave rectification

The Context: Multiple manufacturers of electro-magnetic brakes offer rectifier modules to switch their DC brakes with an AC feed. This can often be tied to the same phases turning the motor, so that ...
4 votes
3 answers
893 views

How does this negative voltage rail work?

Rod Elliot has a dual bench power supply project on his web site (project 223, see schematic below). I'm trying to understand his method for adding a low voltage negative rail without using an ...
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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 ...
-1 votes
3 answers
176 views

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. ...
1 vote
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Forward biasing of diode bridge in a discontinuous mode operation of a three phase buck-boost derived power factor corrected converter

In this paper, they said that during mode 1 the diode bridge is forward biased because the output capacitor voltage is greater than peak line to line voltage but during mode 2 they are forward biased. ...
9 votes
1 answer
1k views

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 ...
4 votes
3 answers
1k views

Parallel diodes in a single package - is it really double current rating?

As an example: https://www.onsemi.com/pdf/datasheet/mbrb20100ct-d.pdf I've seen discussion where it says diodes in parallel may not increase the current capacity. BUT the datasheet clearly says it's ...
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Choosing filter capacitor and inductor for AC to DC rectifier

I am designing a three phase AC to DC rectifier. This DC output will be connected to a 6 IGBT bridge. That IGBT will be controlled using SVPWM technique to control a PMSM motor. What factors do I need ...
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2 answers
131 views

Ways to charge a VERY LARGE capacitor in a 3-phase bridge rectifier circuit

I need to charge two 1500uF-450V capacitors off of a 3-phase 220Vrms-60Hz line using a very robust bridge rectifier (datasheet) as well as both capacitors datasheet (datasheet). Here's the simulation ...
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112 views

Diodes bridge rectifier with center tapped transformer

I need help with this homework question I have trouble solving it. the thing I don't understand is that when the voltage is positive the only diodes that are active are D1 and D3 and I'm not able to ...
3 votes
2 answers
444 views

How can I calculate the peak to peak ripple voltage of a rectifier circuit with an LC filter?

What is the formula for finding the peak to peak AC ripple voltage across the load resistor for this LC full wave bridge rectifier circuit? The rectifier output is a pulsating DC voltage which has ...
1 vote
1 answer
316 views

PIV in full wave bridge rectifier vs. full wave rectifier

I know that in a full wave rectifier the PIV of the diodes is 2*VP, whilst in a full wave bridge rectifier we have just Vp. It is also said that the bridge configuration is more suitable in ...
1 vote
1 answer
152 views

Why connect a 3-phase alternator's star-point to a rectifier bridge?

I noticed while troubleshooting a Denso alternator that the stator's star point was connected to the rectifier bridge. While probing with a multimeter, I think the schematic looks something like the ...
5 votes
3 answers
6k 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 ...
4 votes
1 answer
135 views

Is this supposed to be the output of this circuit?

I used LTspice to simulate a oscillator circuit to convert DC to AC. The oscillator is then connected to a class AB power amplifier to increase the circuit current. The load of the Class AB amplifier ...
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39 views

Are there any extra steps I can take to prevent noise on the output of this circuit?

I made a rectifier/boost converter PCB board in order to power a USB type-C charge module. The USB charge module will solder into the output posts on top of my board. And, since the charge module ...
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2 answers
108 views

Phase on full wave bridge rectifier

I have a seemingly simple question: I have a full wave bridge rectifier that is connected to 220 VAC. When I stick a phase probe on it's (-) negative pole, I see it's light: And that's something I ...
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1 answer
51 views

Could I use a bridge rectifier with a capacitor to make a measurable DC voltage to measure the output of the detector coil in an NMR?

I'm making an nuclear magnetic resonance (NMR) detector. I'm wondering if I could use an bridge rectifier along with an capacitor to smooth out the output to DC. Then I could measure it with an ...
1 vote
1 answer
101 views

Issues with a full bridge rectifier, receiving output approximately half of the expected output

I have receiver circuit for a wireless power transfer circuit. I have connected the circuit as shown in the image below. The circuit has a full bridge rectifier (DBS103S-T) which is then followed by a ...
5 votes
2 answers
1k views

Why is this voltage tripler actually quintupling?

Today I was experimenting with voltage doublers and tripler for a hobby project demanding a voltage I can't directly pull from the transformer I have. The following measurements confuse me: I was ...
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2 answers
162 views

150 VDC power supply for motor

I am looking to design a power supply but confused on specifics. I have a mechanical engineering background, but do not have much experience working with electronics. This is for a personal project I ...
12 votes
5 answers
2k views

Why is this rectifier bridge using double diodes? [duplicate]

While reading some old (paper) books, I found this as an example but without further explanation: Why does it use double diodes? I don't see anything about this elsewhere. Does this increase the ...
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545 views

Thyristor Voltage Waveform in a Full Wave Bridge Controlled Rectifier at Discontinuous Mode

I'm having some trouble to understand the thyristor voltage waveform for the full wave bridge controlled rectifier. I plotted the Voltage at the secondary, the current at the load, the voltage at the ...
2 votes
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Charging an 18650 Li-Ion cell via a bicycle hub dynamo

I'm interested in building a buffer battery for a 12V GPS tracker using a single 18650 Li-Ion cell. It will be mounted on a bicycle and unfortunately I haven't found a design for a tracker including ...
0 votes
1 answer
216 views

ZVS circuit to generate high DC voltage

I'm trying to design a high DC voltage generator to create a voltage differential between the upper and the lower part of a cloud chamber I'm building. I'm trying to use a ZVS circuit to amplify an ...
5 votes
3 answers
437 views

Bridge rectifier circuit with a step-up transformer

I have been experimenting with a full-wave bridge rectifier in LTspice. I am trying to step up 120 V AC/60 Hz to 1 kV DC for a load of around 2 kΩ. The step-up transformer has a ratio of 25:9. The ...
1 vote
3 answers
470 views

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 ...
26 votes
5 answers
2k views

Can two BJT transistors work as a full bridge rectifier?

It is known that a BJT transistor looks like two diodes back to back (or head to head). With this in mind, theoretically we should be able to build a full bridge rectifier with 2 BJT transistors, one ...
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1 answer
365 views

How can I properly measure the output of a full wave rectifier using an oscilloscope and a function generator?

I would like to measure the output signal from a full wave rectifier in a proper way using an oscilloscope. The sine wave comes from the function generator and is 10 Vpp. Both devices are mains ...
3 votes
1 answer
484 views

MOSFET TO-220 heat sink pad is electrically connected to drain. Can I solder wire or trace directly onto heat pad, instead of drain pin?

I have a board-layout where a lot of things would be easier if I could solder to the metal-pad of the TO-220 N-channel MOSFET, instead of the drain pin. Apart from: "Metal pad was intended for ...
1 vote
1 answer
168 views

Maximum load capacitance and rating for fusing for bridge rectifier

I'm looking for a replacement for an old bridge rectifier and I've found one (Vishay B80C1500G), but I'm curious about two parameters of the bridge rectifier: Maximum load capacitance Rating for ...
1 vote
1 answer
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Full-bridge rectifier is not working

I tried to copy the full-bridge rectifier circuit diagram but for some reason it's not working. I think the current is not flowing from the high-voltage circuit device because I tried to hook up a ...
5 votes
4 answers
804 views

Is the RMS value the same after you pass it through a full wave bridge rectifer?

Is the RMS value the same after you pass it through a full wave bridge rectifier? That is if the value was 230VAC (RMS) before the rectifier will it still be so after the rectifier? (ignoring any loss ...

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