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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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Discrepancy between calculated rectified voltage and measured value

I'm experiencing some problems with a simple task. Assuming we have a circuit like this: simulate this circuit – Schematic created using CircuitLab To calculate the rectified voltage I'd use ...
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1answer
27 views

Measuring 24V AC input state with microcontroller

I need to measure the state (on/off) of a 24V AC line that is currently powering a solenoid valve. The microcontroller will take over the control of the solenoid through a solid state relay, but I ...
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63 views

What is a typical reverse recovery time for a zener diode, or is reverse recovery time not applicable to zener diodes?

A little background.. I'm trying to understand how zener diodes respond to high voltage transients. I stumbled across discussions of reverse recovery time and I'm curious how it applies specifically ...
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78 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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52 views

Capacitor in series with diode

Hi, not sure if I'm getting this right. Current flows from the positive side of the AC voltage supply and charges up the capacitor, the capacitor cannot discharge as the diode is reverse biased. So ...
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50 views

SMPS secondary rectifying diode placed on GND instead of Vcc [closed]

I have designed a SMPS (low noise) and diode is placed on GND instead of normal Vcc . Is there a benefit having the diode placed there instead of Vcc from a noise perspective ? Is it possible that I ...
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19 views

Rectifier Design RL load

I have a design problem with the circuit below, in order get the commutation angle u I need a value of Ls, assuming all other values are known in the formula below. As far as I know, Ls & u are ...
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43 views

Rectifiers and cable sizing

I have a rectifier with 12x2000 W (24 kW) modules, used with 8 strings of batteries in paralel (4 batteries per string, 180 Ah batteries capacity). I want to size the main input cable, I did the ...
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2answers
76 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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1answer
73 views

MOSFET - shorting the gate and source

I am currently in the fourth year of my bachelor's degree and my knowledge on this is really really really very limited, but i got a simulation circuit of an isolated dc-dc converter from my senior ...
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3answers
156 views

Is this a selenium rectifier?

The item below is one of two components of an old (c 1950?) electric chisel. (The other part is a reciprocating solenoid.) The name tag on this part says "Electric Converter", with a 6 amp rating. ...
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2answers
61 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
188 views

How does this opamp full-wave rectifier work?

I want to understand how the following circuit works. I understand OpAmps, diodes, and voltage dividers pretty well; but put this circuit together, and I don't know how it affects positive or negative ...
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53 views

Using Opamp as rectifier

Schematic below is a current sensing circuit, Rs is 35u sensing resistor and current I1 is bi-directional. I am confused on why diode D2 makes this circuit a full rectifier. Schematic: Simulation ...
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32 views

How to measure Power Cnversion Efficiency of the rectifier in cadence?

How to measure Power Conversion Efficiency of the rectifier in cadence? I am trying to measure PCE of rectifier using this method: ...
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2answers
460 views

Full wave rectifier with a high DC offset voltage?

For a full wave rectifier, can it rectify an AC wave with a DC offset above the rated voltage of its diodes rated voltage if the peak to peak voltage of the wave is within its rated voltage? Like if ...
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22 views

input impedance of Dickson charge pump

How can I find the equation of input impedance of Dickson charge pump and its relationship with number of stages and the other parameters?
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2answers
55 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
43 views

What are the differences between Greinacher and Bridge voltage doublers?

I was reading a wiki article on Voltage doublers, and wondered - what are principal diffirences between two following schemes: They all share same amount of components, but when and why should be one ...
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2answers
67 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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29 views

How to calculate the output voltage of a full-wave rectifier if the output is connected to a half-wave inverter

I am using PSIM, and I want to connect a single-phase full-wave rectifier to a half-wave inverter, as shown in the image. I know that the output of a rectifier depends on its load type, so what should ...
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1answer
56 views

MagJack for PoE Powered Device

I am adding Power over Ethernet functionality in my Toradex's System-on-module (Colibri iMX6ULL) based carrier-board design. I ...
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103 views

IGBT failure and protection

I have a 3-phase bridge rectifier (shown below). I am using an IGBT (STGE200NB60S) to limit the inrush current from the capacitors at start up. I also added the NTC thermisters to help with the inrush ...
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152 views

What is Maximum Average Forward Rectified Current? (1N4001 Diode)

I am wondering if someone can explain what Maximum Average Forward Rectified Current means for a diode. I see that this is marked as 1 Amp in the datasheet for the 1N4001. I have not been able to find ...
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58 views

Is it possible to use DC-restoration as a half-wave rectifier?

A simple DC-retoration circuit: seems to do the about the same job as a half-wave rectifier, is it standard to use these two circuit instead of each other ? I tried to increase the capacitance of ...
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69 views

how to reduce the rms value for a bridge rectifier?

hello!! can any one help me with this circuit.i need to reduce the rectified dc voltage.is it possible to reduce the R.M.S value after the bridge rectifier i.e before the capacitor? practical value (...
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225 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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221 views

How is the extinction angle for a half wave rectifier with RL load calculated?

I have a couple of notes about the half wave rectifiers with the RL load, but I dont quite undestand how is obtained the extinction angle \$\beta\$ ? simulate this circuit – Schematic created ...
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98 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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6answers
1k 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
69 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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23 views

Derivation of the equivalent model of a resonant converter

I'm trying to understand how a resonant converter works, but one thing confuses me, and this thing is the derivation of the equivalent model using first harmonic approximation (FHA) method. At first ...
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1answer
51 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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ATRU 18pulse winding topology advantages

There are three main winding topology when discussing ATRU's T-delta, Delta and Polygon The question is though... when to use which topology... The general approach I take when dealing with ...
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29 views

How to compute the least overshoot Voltage used by schottky rectifier?

I have a schottky rectifier, it's 11DQ10. I know the Max. Working Peak Reverse Voltage is 100V Vrrm? If i give it a singal which is a Damping pulse, the first peak maybe over 100V, but the second ...
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3answers
91 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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0answers
49 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
150 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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53 views

Transformer identification needed

Would someone please help identify this transformer colour and what is goes to. I managed to pop the fuse few time trying to measure voltage of any sides and wires. Here what i did so far, and wired ...
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3answers
85 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
43 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
55 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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51 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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48 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
255 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
64 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
77 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
36 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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55 views

Sizing capacitor filter for 12-pulse rectifier with bridges in series

I've always used circuits where the load is directly in parallel with the capacitor but what happens when using this topology in order to have a 12-pulse rectifier with bridges in series? Should I ...
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64 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 ...