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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2answers
65 views

How do I calculate the average voltage of this wave?

I need to calculate the average voltage of the wave below, the DC voltage is 120 V , the curve starts at 21.65 degrees and the peak voltage is 325.269 V. The solution is 221.3 V. This is from a ...
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44 views

Schottky diode / Rectifier Diode difference and how to test them?

I have 3 diodes that I would like to test 1x USD935 2x USD2009 USD935 is identified by its datasheets as a "Power Schottky Rectifier Diode". I cannot find the datasheet of the USD2009 but they have ...
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24 views

Three Phase Rectification using by Bi-directional N-MOS Switch

I have been trying to design three phase rectifier using by bi-directional N-Channel Mosfet . However, Non-isolated gate driver is not able to open and close U4, U8 and U12 on image. What kind of gate ...
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1answer
54 views

Centre tap transformer unknown rectifier citcuit

I have an older transformer with a rectifier circuit what I managed to backtrace and looks like this: I could not find a lot of details about this online but it seems the transformer can supply ...
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1answer
58 views

MOSFET rectifier [closed]

I am building a bike light system, powered by a bottle dynamo. Given that the dynamo typically outputs 6VAC and a maximum of 3W, I will try to make the circuit reasonably efficient if possible. In a ...
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71 views

Will this Arc Lighter Circuit Work?

I am attempting to build a really cool thing (at least I think). The goal is to build an arc lighter that I can shake to charge (kinetic power). It's a circuit that combines an arc lighter circuit ...
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38 views

Three Phase Voltage Measurement

I have matrix rectifier.However, I want to measurement phase voltage by ADC during not rectifying matrix rectifier? Can I measurement phase voltage with passive rectifier?
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1answer
55 views

How do I calculate the capacitance in this circuit?

I can't find any source online to how I can calculate the capacitance in this circuit, the previous questions seem solvable, but any help would be appreciated thank you!! Here’s a formula I found, ...
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1answer
588 views

Bridge rectifier outputting 338 volts DC with 120 volts AC input

I am measuring the live voltages right now and am seeing these numbers. I thought 338 volts DC was the result of rectifying 240 volt AC? I understand that 120 volts AC is the Vrms reading and that ...
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53 views

Noise level detector circuit design (AC to DC to PWM)

So I'm building a sound level detector. Design requirements are: Only basic circuit elements No IC's, except for op-amps Sound level will be displayed with a blinking LED Blinking LED will be ...
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4answers
90 views

Why is it that a full bridge rectifier requires input to be derived from a transformer that provides dc isolation from the supply?

Recently I came across this and searched a lot online for an answer but couldn't find one... I found it mentioned in basic electronics book under rectification...It was also mentioned that the ...
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Error % for readings of average-sensing multimeters

Question: What is the error % in reading the voltage of a Square wave (1 Vpp) with an average-sensing multimeter with a half-wave rectifier, compared to a TRms multimeter The answer seems to be 11.1% ...
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Could this resistor be intended to do anything other than inrush limit?

Repaired a little board today that had a simple half wave rectifier on it. The capacitor had a resistor (R1) in series, that was obviously getting hot and wasting a lot of power. I assume the resistor ...
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37 views

What is the output voltage and PIV of the half-wave rectifier?

I was analyzing the following circuit, applied sinusoidal voltage at the secondary is 20 Vrms (DVM measurement). My intention is to calculate the output voltage (Vo) measurement when using the DVM and ...
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1answer
74 views

Rectifier circuit for ACS712 with 3.3V ADC

I'm using an ACS712-5A hall effect current sensor that output a voltage roughly between 1.5V to 3.5V. I'm am measuring a main AC power line at 50Hz. I'm using and ESP32 which has a built-in ADC with a ...
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1answer
71 views

Cascade multiple Full-bridge Rectifiers Connected to Multiple AC Sources

I want to rectify multiple isolated AC signals (Generated from multiple wireless power receiving coils) to a single DC load. For example, consider the following the schematic with two voltage sources \...
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230VAC rectifier capacitor selection: peak vs RMS current

See in attached file the current throug a 47uF after 230VAC bridge rectifier. As you can see, peak current is 1.7A, the RMS value is 609mA. The supplier gives a 680mA ripple current of one of ...
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72 views

Can I create a common ground between a rectifier and USB powered microcontroller?

I am working on firmware to decode the Marklin (MM/MFX) track protocols using a PSOC 5LP micro controller. Is it possible to create a common ground between the track ground, micro controller ground, ...
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3answers
70 views

Full Bridge Rectifier - Voltage Drop Under Load

I am trying to get 5v DC by rectifying the output of a microwave transformer i rewound (the transformer gets approx 4.2V AC on the secondary winding). I managed to get approx 5V open circuit ...
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1answer
50 views

Can a multi-secondary transformer be used with a full wave rectifier?

I got this board and from what I see, it should be used with a center tapped transformer with 0-9-18 as secondary because it uses a full wave rectifier: I have a normal transformer with 4 secondary ...
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Power supply - purpose of the capacitor on the side of the transformer before full bridge rectifier

I was wondering if someone can explain the purpose of the capacitor C1141 from the attached picture. I know that C1142 is a filter cap: that much is obvious to me. However, I can't seem to grasp the ...
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1answer
31 views

Derivation of diode voltage in three phase full wave diode rectifier

Considering ideal diode in 3 phase full wave diode rectifier we can present the system in picture below. I found the final equation for \$v_{D6}\$, but can not figure it out how it was derived. \$v_{...
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1answer
62 views

What's best method to synchronize with main AC voltage?

I'm making an active rectifier, to make it work I need precise information about actual phase of main voltage. What I need: 1) exact moment when the positive section of sine wave starts and ends. ...
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1answer
29 views

Efficiently rectify 18-20V to 12V AC-DC for wireless charging

Connected to terminal J1 is a wireless charging receiving coil (18-20V AC). Is there a more efficient way to produce 12V DC from this with enough power to drive the charging circuit and wifi comms (...
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39 views

Biasing an Enhancement NMOS with Gate-Source Connected

I'm working on a university project wherein a full-wave rectifier is constructed using two enhancement mode NMOS transistors. I'm tasked with designing a biasing circuit for the NMOS', but I don't ...
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2answers
76 views

In a half-wave uncontrolled rectifier with RL load why does the voltage spike when current reaches 0A?

I understand that the inductor creates a negative voltage to oppose the change in current but I don't understand why the voltage spikes up instantly when the current reaches 0A.
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Why are many 9V DC wall adapter power supply measured as 12-14V by a multimeter? [duplicate]

I have tried with many (working) 230V - 9V DC wall adapter power supply (of different brands, some of them coming with an electronic Yamaha device, etc.): they all show a higher voltage when ...
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1answer
156 views

Why isn't this active rectifier circuit working?

I built the following active rectifier schematic on a breadboard, and inputted a 15 KHz 1V peak to peak sine wave from my signal generator. The output looked like a sine wave and I have no idea why. ...
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1answer
56 views

Diode bridge rectifier convert 13.5v ac to 17v dc

i just make a voltage rectifier as shown below Four IN4007S diodes one 15k ohm resistance one 25v 2200uF capacitor I have a 220v->13.5v transformer, and transformer output is supposed to convert ...
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2answers
99 views

Is this the proper way to create a high voltage (low current) straight DC signal from a 9V battery?

My goal is to create a circuit that will take in a 9V DC battery as input and produce a high steady +1500V DC signal. I don't need high current at all. 1 microamp of current will do. The scheme goes ...
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1answer
28 views

How can you work out the internal resistance of a rectified 3 phase generator?

If there is a star topology 3 phase generator such as this- Connected to a full-wave diode rectifier such as this- Can you approximate the circuit to this-? (assuming steady state, DC load) If so, ...
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1answer
49 views

What is the practical limit/best practice for the average rectified output current of a diode in AC applications?

Background: As part of a little project I'm looking to add a diode to a hair dryer to cut the output in half. This is the circuit: The potential diode in question is at the bottom, and the simulated ...
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1answer
45 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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2answers
118 views

Alternative to center tapped transformer [closed]

I would like to replace a center tapped transformer, which is directly connected to a full bridge rectifier, by two DC lab power supplies. Does that make sense at all? The power connector goes ...
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0answers
86 views

3-phase rectification using individual step down transformers for each phase

I'm looking make a simple low-voltage DC power supply from a 3-phase supply. Looking into 3-phase rectifiers I came across the below articles https://www.gprectifier.com/news/rectifier-11261763.html ...
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1answer
294 views

How can I rectify up to 85 kV?

I've recently gotten into eletrochemistry, and I found out that if you break through \$\epsilon_{0}\$ with a high enough voltage you can ionize various gasses. I've already wound a 1:1250 EE core that ...
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1answer
84 views

Why rectification amplifies signal? [closed]

why a thermionic valve can amplify an electric signal (for instance, a radio wave or AC), by removing half of its phase? In other words, how is it possible that half-wave rectification can amplify the ...
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1answer
121 views

What is the purpose of these diodes?

What is the purpose of these didoes? I couldn't find it because I don't know it's name. Thank you. simulate this circuit – Schematic created using CircuitLab
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1answer
49 views

Finding the output of a node with two diodes (kind of full-wave rectifier)

Maybe this question sound stupid, but I really suck at electronics. I have this circuit here: simulate this circuit – Schematic created using CircuitLab and i want to find the values of ...
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1answer
31 views

How does an optimized car battery charging system could be designed?

To start, I saw a scooter electrics. In that implementation, after quite a weak (in my sense) generator it has some shunt linear regulator, that just dissipates overvoltage to heat. Oh god! Weak ...
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1answer
66 views

Rectifying reversible polarity battery with minimal power loss

I'd like to build a battery-powered DC power supply that will accept a single-cell battery in either polarity (i.e. it doesn't matter which way you put the battery in). I'm thinking of using the ...
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2answers
259 views

How to find the right smoothing capacitor for rectification circuit

I am creating a power supply which will need to convert the 24vac to 5vdc. I am thinking of using a rectifier to convert ac to dc, then a capacitor to smooth out the voltage, then an LM2596-5 to drop ...
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1answer
114 views

Schottky Diodes as Full Bride Rectifier

I need to make a 75-100vdc high current power supply. I do not have any high current diodes or bridge rectifier ic’s but I do have a load of scrap switching power supplies. Could I take 4 of the(lack ...
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2answers
65 views

Find instant in which diode starts conducting in transformer full wave rectifier

We have the following circuit V2 = Vs/a; a = 10; Vs = 100sin(wt); w = 200 rad/s; Each of the diodes is modeled by a fixed 0.8 V drop when conducting, and by an open circuit when OFF. Find the ...
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1answer
80 views

Cheapest way of rectifying 60hz -> 30hz 120V AC to halve speed of PSC induction motor

I am trying to slow down a PSC motor. (VFD’s are expensive) I can cheaply rectify AC into the following waveform. 2 positive peaks then 2 negative peaks repeating. It would look like pictured. ...
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2answers
104 views

Double wave precision rectifier frequency response

To perform a didactic experience, I had to design a double wave rectifier by using op-amps (TL081). I choose to use two stages: a single wave precision rectifier (i.e. ideal diode) and an inverting ...
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2answers
83 views

How come rectifier diode current waveform is not distorted?

Shockley equation is non-linear but without any linearisation effort such as in BJT small signal biasing, half wave rectifier passes almost an undistorted half sine wave. In amplifier we bring the ...
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1answer
52 views

Tripping a circuit breaker when using a half wave rectifier

How does a half wave rectifier or phase control dimmer affect the triggering of a circuit breaker? For example, if a 20A resistive load was on a 15A breaker with a half wave rectifier. Now average RMS ...
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1answer
53 views

Limiting maximum voltage

I can't seem to find an answer to this, or the answers available are too advanced for me to understand. I have an AC source 0VAC-40VAC. I also have a buck converter rated at 6VDC-24VDC input, and 5V ...
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2answers
118 views

Diode rectification

Why don't I use this circuit for full wave rectifier instead of Bridge rectifiers or Center tapped transformer type rectifiers?