Questions tagged [rectifier]

These are part of AC to DC conversion. A half-wave rectifier keeps only the positive part of the signal. A full-wave rectifier also keeps the negative part, but flips it to make it positive too.

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148 views

Could the extra power not used through a regulator or buck converter be used in another load without taking away power from the regulator? [closed]

I’m making a design for a crank generator which will charge my phone and a battery at the same time. The generator will be connected to a bridge rectifier, then a buck (step down) converter, which ...
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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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3answers
1k views

Full wave rectifier

In a full wave rectifier (consisting of 2 diodes), ac is converted into DC. Confusing part is I know how the rectification is done, but still how the input ac current (consisting of both negative and ...
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1answer
157 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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3answers
178 views

“Active Low” SCR

Background: I'm working on a circuit that uses an ATmega 328 processor, and a hall effect sensor. We're creating a small wireless sensor, so what we're focusing on now is power consumption. We want ...
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53 views

Rectified X2 circuit gives 2 voltages depending on how the powerplug is connected to the wall (EU)

simulate this circuit – Schematic created using CircuitLab I'm trying to control a mosfet directly from a phase shifted 50Hz sine wave. But when I was trying to understand the voltage drop with ...
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4answers
3k views

Question regarding ripple factor

For the pictures above, I am confused as how to how they got/derived the formulas for the peak to peak ripple voltage (VrPP) and Vdc. So far, I got the output voltage, which is 14.9 volts. However, I ...
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176 views

LM833N OP AMP Configuration Help [closed]

I am using this Chip: LM833N to essentially trying to Half Wave rectify my low AC signal input ~1.36Vp. Using it in this configuration for now to get things started (Ignore the part number). CH1 ...
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1answer
136 views

Calculation of 3-phase power in Electric Vehicle Charging

I have a doubt regarding calculation of 3-phase power in EV charging. On the last page of the pdf in the link given below, the power calculation is done as 3 x 230V x 16A = 22kW. http://www3.fronius....
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1answer
71 views

In a 3 phase rectifier, why is the output always the highest voltage?

Consider following circuit At t=0 I can wrap my mind around the fact that Vout equals whatever value the highest phase has since the others are negative or zero. But after that only one of the three ...
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2answers
176 views

Y/Y/Δ or Δ/Y/Δ transformer for a series connected 12-pulse rectifier?

I'm aware that 30° shift is needed in order to obtain a 12-pulse rectification, however, I'm a bit confused about the configuration of these transformer. In most HVDC systems that appear in Alstom - ...
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404 views

Help understanding smoothing chokes

Assume the input voltage is a sinewave. How does the voltage/current across the resistor R change with variance of inductivity L? If I we assume L -> inf, what kind of waveform would we get at the ...
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1answer
5k views

Frequency response of a parallel RC filter (smoothing capacitor in rectifier circuit)

I understand qualitatively and electrically how a smoothing capacitor works in the case of a diode-based full-bridge rectifier but what I am not too certain of is how to describe it in terms of its ...
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3answers
266 views

Three diodes in series rectifier

So, I want to make AC 220V to DC 220v rectifier. Can I use two or three diodes in series, because the reverse voltage maximum of one diode is about 60 volts?
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1answer
245 views

Clipped input sine with 1N4148 signal diode

in my electronics lab at university we were studying diodes and I stumbled upon a behaviour that I cannot understand nor explain (I'm I physics undergrad, not and EE). The circuit we were analysing ...
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1answer
38 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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119 views

explain 12 pulse rectifier output and filter circuit?

Parameter 3 phase 115/200 volts AC Input 200-amp output Input Frequency is 400 DC output is 28 volts Output ripple is 1.5-volt maximum Question : on transformer secondary side it is star and ...
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61 views

What's wrong with this modified 12-pulse rectifier topology?

I added two capacitors downstream in order to absorb AC component from rectifier current. Both Subsystem blocks are meant to form "triangular" currents in order to have these currents at both HV ...
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1answer
90 views

unsigned op amp output?

edit: OK, I am making it simpler. Currently, the input varies from -1 to +1V, and the output is (obviously) -1 to +1V. I want the output to vary from 0 to +1V. Not just shifted up with a dc bias and ...
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2answers
216 views

Why does my LM317 give lesser output than with LM337?

How can I maximize the ouputs?
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1answer
646 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
59 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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1answer
63 views

Resistor network in half bridge rectifier

I have come across the following half bridge rectifier circuit connected across phase R and T. I'm wondering about the large resistor network in parallel with the source. What is the point of this ...
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2answers
2k views

How is the voltage supply and peak-to-peak voltage of a rectifier found in this example?

I'm struggling with rectifier calculations, and below is an example my teacher uploaded in my blackboard. How did he find the frequency of the voltage supply and what is the calculation of the peak ...
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2answers
270 views

ac current measured in a 3 phase dc rectifier

Hi have a 3 phase DC rectifier: input 400V AC; output up to 10V/2000A DC I'm aware that it's normal to have some AC current in the output of the rectifier and in this particular case it is acceptable ...
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2answers
317 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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1answer
71 views

Waveshaper: Amplitude changing as frequency changes

I have designed a Sawtooth to triangular waveshaper using a precision full wave rectifier.I added C1 to stop clipping and the parallel resistors R7 and R5 to get the triangle's ampitude the same as ...
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1answer
351 views

AC ammeter for battery charger

I am having a bit of confusion regarding the use of AC ammeters in a battery charger circuit. The electronics shop guys told that they have been using it successfully in their chargers. Can this be ...
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2answers
166 views

How to solve this differential equation corresponding to the RL circuit?

When VT is under on-state, this function is set up: $$L\frac{di_d}{dt} + Ri_d = \sqrt{2}U_2\sin(\omega t) \quad\quad\quad\quad (1-1)$$ I can't solve this function :( The instantaneous ...
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2answers
362 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
181 views

Low cost power supply redundancy

I'm looking at coupling the output of two computer PSUs, driving a fairly stable high power project (around 300-400W peak) most likely using all output rails (12V, 5V, 3.3V) all well within the rated ...
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2answers
860 views

center tap transformer full wave rectifier current rating

for a 24V output, I have the option to purchase a 0-24V 5A transformer, or a 24-0-24V 5A transformer. Can I draw 24V 7A from the 24-0-24V transformer (full wave rectification with 2 diodes)? Assuming ...
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1answer
250 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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2answers
439 views

Op Amp peak detector not working

I'm using the following circuit for a half wave rectifier. I have the following values: R1 and R2 = 1K, Vin: 400mv peak to peak, 60 Hz (it's a sine plus noise) D1 and D2: 1N4007 Op amp: LM 741. ...
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2answers
813 views

How does a Schottky diode rectify RF signals

In low frequencies, the diode rectifies the input signal depending of the bias polarity. This is because (the simples case) the diode is consider either an open or closed circuit. In high frequencies ...
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1answer
237 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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2answers
644 views

half bridge smps with synchronous rectification basic working principle

I am trying to understand the basic working principles of a Half Bridge SMPS with synchronous rectification. Whilst I understand the workings of a Half Bridge SMPS with diode rectification, I fail to ...
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1answer
96 views

LC diode rectifier

In an article I read, I stumbled across a circuit which seemed quite unfamiliar: simulate this circuit – Schematic created using CircuitLab According to the article I found this circuit in, a ...
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2answers
2k views

Designing a full wave bridge rectifier [closed]

I am making a bridge rectifier using 1n4001 diode and a step down transformer 0-12 my question is: a) What value of smoothing/filter capacitor should i use? b) I tried two different capacitor one of ...
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3answers
669 views

Smoothing capacitor burns out while I am trying full wave rectifier

I am new to Electronics. I am trying the Full wave rectifier. I use a transformer and 4 1n5408 diodes (Vdrop is 1.2V) and try to get 24VDC output from 220VAC 50Hz. I measure the AC output (of the ...
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0answers
150 views

2-phases connected to single rectifier

I have come across an unusual part of a circuit that I hope someone could shed some light on and I have redrawn in LTSPICE. The circuit is to measure voltage of a 3-phase generator. Two of the phases ...
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2answers
119 views

Why does current associated with a rectifier said to have both ac and dc components?

Why does current associated with a rectifier said to have both ac and dc components. Also how are they combined?
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1answer
2k views

Conduction Period;Half wave rectifier;Battery

How can we calculate the conduction period of the diode when a half-wave rectifier is used to charge a 12 Volts Battery through a resistance 'R'? Given the input is fed by 34 Volts AC with turns ...
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1answer
7k views

How does a capacitor work as a filter in rectifier circuits (with equations)?

I've looked at many places and everyone seems to give a qualitative explanation of the filtering process, which does explain some part but I think fully understanding the stuff needs some equations ...
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1answer
3k 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
122 views

Mistake in reading a rms voltage

I got a really strange result. I've build a full-bridge rectifier with a capacitor filter. And I used the following values \$\text{C}=500\cdot10^{-6}\$ and as a load \$\text{R}=1000\$. The maximum ...
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1answer
2k 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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2answers
88 views

Position of capacitor in a full wave rectifier circuit? [closed]

Can a capacitor be connected after the load resistance in the following circuit: Why or why not?
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1answer
444 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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