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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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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319 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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0answers
89 views

Full bridge rectifier forward voltage definition

I am looking for an efficient way to rectify a 3–20V AC voltage (at ≤2A) and am therefore looking at integrated full bridge rectifiers and discrete Schkottky diodes. In a datasheet of a full bridge ...
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1answer
867 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
396 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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0answers
1k views

What could have caused bridge rectifiers to fail?

Ok, so I have a pioneer surround sound that I was trying to fix because of one speaker had very low volume. What I changed was a resistor, its the exact same color stripes, but the size is a bit ...
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0answers
430 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 ...
2
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1answer
345 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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50 views

Advantages and disadvantages of using igbt module with integrated rectifier bridge

What would be the main problems of using an igbt module with a rectifier bridge in an ac-ac converter project? Noise? Temperature? Does separating the rectifier bridge from the full bridge really ...
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0answers
64 views

How to confirm if diode bridge is faulty

How could I confirm if the faulty component in my circuit is the diode bridge (marked as B) in the attached image? If I set my polimeter to AC and measure LN in point A I get the correct 220v, but ...
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1answer
82 views

Tap into stepper motor signal

I was wondering if it is possible to tap into the signal either on the low power side (between motion controller and the stepper motor driver) or on the high power side (between the stepper motor ...
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0answers
43 views

How to choose high frequency inductors for high voltage line filtering?

I saw these inductors 680 uH (RL-1294-680) in each power line like shown below. The line to line voltage is 480 VAC. The inductor used has a saturation current of 280 mA. So I suppose I shouldn't ...
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1answer
190 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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863 views

12VAC to 12VDC Converter Requirements for RGB LED Controller

I have an outdoor lighting transformer (operating at the usual 12VAC) that I want to add a strip of LED lights in a new run. The transformer has two legs, each ...
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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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15 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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1answer
41 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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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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0answers
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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28 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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33 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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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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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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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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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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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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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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23 views

Do same current formulas apply if a capacitor is added, and vice versa for inductor

Ok so the title question is a bit misleading but its hard to explain in that small space. My questions concern themselves with the analyzing of the circuit observed below, however fundamentally ...
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1answer
55 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 ...
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66 views

Calculation vs. simulation of DC output voltage from full wave bridge rectifier, through voltage divider, with no transformer

I'm designing a circuit using an Arduino to measure / monitor US line voltage; single phase 120VAC (170v peak) @ 60Hz. The circuit itself is a simple full wave bridge rectifier using 1N4007s. The ...
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1answer
39 views

How do I caluclate which capacitor to use as a filter after the brdige rectifier using the 18Vpk A.C. 50 Hz as a source?

Like how would I go about on it? From calcualating the ripple voltage, to knowing which value of farads to use.
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51 views

Peak Inverse Voltage of full wave rectifier in case of different diodes

Does the peak inverse voltage remain the same for all the diodes in a full wave rectifier, when we are using both germanium and silicon diodes in the rectifier circuit?
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42 views

Simple power supply troubleshoot

I have a very simple power supply circuit, consisting of a 220V:22V transformer, full bridge rectifier (1n4007 diodes) and a smoothing capacitor (electrolytic, 4700uF). The output voltage should sit ...
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105 views

Measuring technique for bridge rectifier driven by function generator

I am confused about a problem I am having measuring the output of a full wave diode bridge rectifier driven by a function generator. I am only getting half of the output as if it where a half wave ...
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43 views

Problems related to Zener Diodes to determine the ratio of transformer

I am having a problem which is related to a circuit as shown below: simulate this circuit – Schematic created using CircuitLab I will give you more information about this circuit. V1 in this ...
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17 views

Separate FB rectifiers for each phase, outputs in series…bad idea?

Newbie here. So I have made myself a mini hobby 3 phase wind turbine that rarely outputs enough usable voltage from a 3- phase rectifier. Didn't find any adequate info on it online but made sense in ...
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78 views

PI Filter After Bridge Rectifier - Inductor at Positive Line or Negative Line

I was reading the InnoSwitch-CE Family Datasheet for a design I'm currently working on. At the Circuit Board Layout Recommendations section, it's stated that the inductor should be placed between the ...
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2answers
222 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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318 views

What happens when you put two rectifiers in series to get DC from a stepper motor?

For a project a stepper motor is used as a generator because of the decent amount of power at low RPM. Now have found that one rectifier is sufficient when placing the coils in series. First however, ...
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0answers
58 views

How do you design a bridge rectifier circuit?

I am trying to design a bridge rectifier circuit (without capacitor). When I try measuring and graphing the output and input, the input looks fine but the output is just a straight line. Did I design ...
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0answers
14 views

Calculate 3 phases VA apparent power from DC load after bridge rectifier

In a tomatoes greehouse I try to power some high bay led light with 3 phases (400V between each phase: 230VAC*SQRT(3)). After 3 phases rectifier bridge i use the average DC line about 540V. All the ...
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0answers
30 views

Rectifier and EMI filter for multiple led drivers

I try to make a power supply stage for 2 offline led drivers insted of making 2 different boards. Find in atteched file the design A and B. Could you explain and suggest me what is the best design to ...
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85 views

Control of battery charging

I have been developing a control software for charging and discharging battery in a dc grid. The system consists of: 01) Three phase alternator with three phase diode bridge rectifier at its output ...
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1answer
48 views

Deliberating shorting PTC to toggle between FBR and HBR

We're designing a board that needs to interface with a variety of different furnace control boards, some of which have full-bridge rectifiers and some of which have half-bridge rectifiers. Depending ...
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0answers
54 views

SiC rectifier Q value vs capacitance

I am choosing between schottky for a bridge rectifiers. But I can understand how to choose a SiC based on the parameters for a rectifier application. I want the fastest 2A SiC diode (for lowest noise)...
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121 views

LTspice DB207 Bridge Rectifier Model

I have breadboarded a 6/12VAC to variable DC power supply that I want to analyze before hard wiring. It uses the DB207 bridge rectifier chip and I cannot find a LTspice model for it. Does anyone have ...
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216 views

220 volt ac to 12 v dc converter without voltage regulator

I want to design Additional RC Filter. My input is 220V AC and I want to observe 12 V DC output. I am designing 100 Hz with a full-wave bridge rectifier. My question how can I find the output of ...
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1answer
59 views

How can I create a moped DC source from the alternator using the chassis as common GND for both AC and DC?

I need to convert from AC to DC the output of the red wire coming from the right stator coil (marked with R) which is the one that feeds the lamps. The idea is to convert to DC then regulate the ...
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1answer
233 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 ...