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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103 views

Why are all the phases connected together on this old alternator

I got my hand on an old car alternator. I can't figure out how it works. What bugs me is that it look like all the phases (and neutral) are connected together right at the output of the stator coils. ...
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LTspice - Inaccurate Center-tapped Full Wave Rectifier Results

this is my first post so I apologize if I do not follow any sort of convention. I have researched how Center-Tapped Full Wave Rectifiers should work and from what I found, when the turns ratio is 1:2, ...
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40 views

Determine the switching mode PS/adapter 12 or 24 V

How, by looking up components inside, to determine the switching mode PS/adapter is max 12 V or 24 V?
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What could be burning the schottky diode in this synchronous rectifier?

I have this TV PSU which has one supply circuit for the TV motherboard, which it calls "standby" in the scheme (AO3). Here's a portion of the AO3 circuit where most of the components I'll ...
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75 views

how this equation is obtained for calculating input capacitor of a fly back presented in UC3842 datasheet?

i know that it refers to stored energy formula for a capacitor according to voltage variations. but i dont have any idea about the specified part. where did this part come from? https://www.ti.com/lit/...
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Understanding the characteristics of a LED driver

I would like to understand the characteristics of a LED driver I have at home. Here is a photo of the label: I never studied LED drivers before. This post, this article, and this document helped a ...
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1answer
39 views

Vienna rectifier Matlab simulation

I am trying to simulate the following case: A three-phase source in a Matlab is connected to a Vienna Rectifier which is supposed to supply power to a resistive load of 50KW. Output DC voltage to be ...
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39 views

Center tap transformer. Voltages 180 out of phase but what about direction of current in 2 parts?

In the center tap transformer (attached picture), my understanding is that volatges in 2 parts in secondary coil would be 180 out of phase. I want to understand the direction of current in both the ...
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Capacitor as a ripple filter in the rectifier circuit - difference in charging and discharging time

Most of the times attached picture is used to depict the use of Capacitor as filter in the rectifier circuit. I guess, i understand the broad concept but I am struggling with the fact that charging ...
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54 views

Why are Switching Signals Used for DC-AC converter

I have noticed that oftentimes an NE555 timer circuit is used to generate AC switching signals, which allow a DC to AC rectifier to convert a DC voltage to AC voltage. This AC voltage can be used for ...
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Replacing some old SKE 1/04 diodes for newer and quieter ones

I´m working as a hobby on a early 80´s amplifier and it has SKE 1/04 diodes at the rectifier. I pretend to make some upgrades, such as nichicon muse caps and I would also like to replace this 40 years ...
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Full-wave rectifier circuit with non-grounded center tap

I'm troubleshooting a full-wave rectifier power supply circuit and have come across something I've not seen before and I'm not quite sure how it works. The center tap of the transformer is grounded ...
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Calculating the capacitance for a voltage multiplier circuit

Recently, I've been asked to create a voltage multiplier, with an output voltage \$Vo = 5*Vi\$, where \$Vi\$ is the peak input voltage. This was accomplished without much issues through the schematic ...
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average calculation vs rms calculation in rectifiers

In rectifier \$R_{load}\$ we calculate \$P_{load}=V_{avg}\cdot I_{avg}\$ why cant we take \$V_{rms}\$ and \$I_{rms}\$ as we are taking like in electrical calculations and also what is the use of ...
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Full bridge rectifier - in depth explanation

Most explanations of full wave bridge rectifiers start off with a diagram like the one below, and then go on about what will happen on the positive and negative cycle of the AC input voltage. This is ...
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Help with LTSpice full-wave rectifier simulation

I'm fairly new to LTSpice and its function. Our professor asked us to construct this specific circuit (in the photo). I tried doing it on my own, but I am not that confident if my LTSpice circuit is ...
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How to remove huge spikes in current

I am making an DC to AC converter circuit in LTSpice. The schematic is posted below. When I plot the current across the transistors, I get huge spikes in the current, as seen in the diagrams below. ...
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91 views

What is the purpose of this zener diode from USB Vbus to Vcc?

tl;dr: The ESP32 DevkitC v4 has a BAT760-7 diode between the USB VBUS and the EXT_5V. What is the purpose of it? I am planning to make a hobbyist project where I need 4.9-5.1V to an external sensor (a ...
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33 views

Split Voltage Rectifier Blowing Fuses

I had somebody bring in some equipment for repair and the fuse on the -32v rail of the supply was blown. I checked the current at the junction of both of the 4.7 ohm 5W resisters and the positive ...
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46 views

How to model the three phase pwm rectifier?

I have been working on a dynamic model of the three phase pwm rectifier also known as active front end (AFE). The circuit diagram is following I have decided to solve that task this way: choose some ...
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1answer
63 views

Why is S11 measurement changing on Agilent E5071B Network Analyzer?

Just a note: This is the second time I've ever used a VNA. I am trying to measure S11 of the 1.88GHz RF Input of this Powercast RF Energy Harvesting board. Link to the datasheet. Powercast Board ...
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38 views

Formula for efficiency of half wave rectifier

I came across this formula for rectification efficiency of half wave rectifier: η= (40.6 *resistance of load resistor )/ (resistance of load resistor+ resistance of secondary of transformer + ...
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What does an AC signal look like when it is grounded with a DC signal?

Sorry if something doesn't make sense, I am not an electronic engineer, if I need to clarify something, please tell me to :) I am upgrading the light on my motorcycle to an LED light. My problem is ...
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MPPT Three-Phase Rectifier - BLDC Generator Project

I'm building a MCU controlled 3phase rectifier that allow voltage and current control. The generator is a BLDC motor (Kv=100, Imax=30A, Poles arrangement=36N42P). It will produce from 16v to 50v ...
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How can I calculate the RMS and Medium Voltage in a Controlled Three-phase Full-Wave Rectifier?

I want to calculate Vrms and Vmedium for the angles of 30º, 90º and 150º on the circuit above with and current source and a resistor load. I found a variety of formulas on the internet, but them all ...
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72 views

Is the peak-to-peak voltage the same as the peak voltage in rectified voltage?

I have a homework in which in need to calculate the peak-to-peak voltage through a half-wave rectifier, center tapped full wave rectifier, and bridge full wave rectifier. What is confusing is that ...
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What's wrong with my diode SPICE model for the HSMS-2860?

To be brief, I am as new as they get to creating SPICE models for components so I'm walking blind. I was trying to create a SPICE model for the HSMS-2860 diode. HSMS-2860 Schottky Diode Datasheet Here ...
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Bridge rectifier still putting out ac and dc, why?

I have a bridge rectifier on my snow blower and it still producing 8 V of AC current and 24 V of DC current. Anyone know why it would still be producing both AC and DC?
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Current limiting rectifier with capacitive reactance (isolated)

[UPDATE] I have answered my own question with links to experimental data and theory. Please expand on that answer if you can for the reference of future readers. Thanks for replies so far and ongoing....
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127 views

Why am I getting this oscilloscope reading? (Half wave rectifier)

I’m trying to use a half wave rectifier with a capacitor filter and instead of getting a ripple voltage at the output it’s giving a signal that looks like white noise(pic below). Any ideas? (a signal ...
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129 views

What's The Purpose of One Additional Diode Here

I'm trying to build a AC/DC buck converter and I've found an application note from ST. Two diodes are connected series at input to rectify the AC, but one is enough to have a half wave rectification. ...
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106 views

ADS Simulation of IV Diode Characteristics

I’m still quite new to ADS, and I’m trying to get a simple simulation of the IV diode characteristics. I want to plot the diode current against a DC sweep from -0.2V to +0.2V Here’s what I’ve got so ...
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Bridge Rectifier Network with three multimeters set to DC

1. Is the transformer functioning properly according to the reading of DMM1 (115-V rms)? In my opinion, the transformer must be working fine in this case. The turns ratio is n=1 (1:1); therefore, it ...
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92 views

ADS Simulation of Half-Wave Rectifier

I’m trying to simulate a half wave rectifier for a -84dBm 2.4GHz AC signal. The rectifier doesn’t seem to be giving me the correct waveform - the negative half cycle isn’t blocked? Also sort of ...
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71 views

LM2596 voltage regulator not providing steady voltage

I was trying to simulate a 3 phase AC full wave rectifier, and wanted a 5V output. I connected an LM2596 module to turn the rectified voltage into the desired 5V output and ran the simulation in ...
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192 views

Rectified Voltage doesn't seem possible

This is my first question on this forum. I recently bought a used guitar amplifier and have the schematic. It's been almost 30 years since I worked in electronics but I thought maybe I could handle ...
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138 views

Current-voltage characteristics of silicon carbide luminescence

I am currently studying the textbook Light-Emitting Diodes (3rd Edition) by E. Fred Schubert. Chapter 1.2 Henry Round's demonstration of the first LED says the following: The mechanism of light ...
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181 views

Understanding how the simple precision rectifier works

I'm specifically talking about this: If I try to graph \$V_{out}\$ , considering that I'm supplying \$V_oSin\left(\omega t\right)\$: I would start by assuming that the diode is reversely biased, ...
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45 views

How to troubleshoot low-voltage home lighting system from 50s

My home, built in the 50s, has a Sierra low-voltage lighting system, where low-voltage 24DC switches control relays that power the normal 120AC lights. In the last week, the switches have failed ...
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42 views

Ungrounded laptop power brick

I'm travelling at the moment and the three-prong plug on my laptop power brick is going through a two-prong adapter and therefore losing the connection to ground. The laptop stopped charging and I ...
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144 views

Is this DC instalation a dangerous situation?

At an industrial plant, we have three electrolytic cells supplied with a 6 V Rectifier (max current 10 kA). Each of the three cells is currently absorbing ~1000 A at 6 V through 8 240 mm² copper ...
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What is the difference between Rectification Efficiency and Transformer Utilization Factor?

As I was studying half-wave rectifiers and why they are less efficient than center-tapped and bridge type full wave rectifiers, I came across these two terms that both try and describe how well the ...
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70 views

Identifying which diodes are on in a full wave rectifier

For the circuit above, I am looking for which diodes are on during the positive and negative cycle. Is it safe to assume that I should just trace the path of the current based on where the diode is ...
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108 views

Sharing ground between two fully bridge rectified AC signals

I am designing a device which has two AC input signals. The Input signals are as follows. A - AC Signal A B - AC Signal B Com - Shared Neutral for above inputs ...
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31 views

Inductive half wave rectifier analysis

The following analysis is taken of power electronics book of William Hart I do not understand the process to pass of first equation to second, solving the derivative of the first equation and ...
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262 views

How can I explain the unexpected negative voltage in the output signal obtained from half wave rectifier?

I observed the output signal of half-wave rectifier sending sine wave and square wave for an experiment. The rectifier was built with a 1N 4001 diode and a 100 ohm resistor. The output signal across ...
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150 views

What is the reason the output signal I obtained from full-wave bridge rectifier has changing amplitude?

I observed the output signal of full-wave bridge rectifier sending sine wave and square wave for an experiment. In both of the output signals it is clear that each cycle shows one of the two different ...
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176 views

How to select the best diode for a full-wave diode rectifier which gives the most efficiency and minimal power loss

I want to make a bridge rectifier that can convert 230 VRMS 50Hz AC into fully rectified DC, but I don't know what particular diode to use for my circuit. In particular, I want to use Schottky diodes ...
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91 views

Half-wave rectifier with resistor and inductor load

I am studying a half-wave rectifier with a resistor and inductor load. It is commonly taught that the diode conducts when it is forward biased- that is, the anode voltage is greater than the cathode ...
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204 views

Rectifier unit in Neve 33609 Compressor Schematic

Real quick question, I'm analyzing the Neve 33609 schematic (as shown below), and I can't figure out what is responsible for rectifying the AC audio signal into a DC control voltage. If anyone has an ...

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