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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What is the purpose of this circuit with op amps?
simulate this circuit – Schematic created using CircuitLab
As far as I know the first opamp seems to be a half wave recitifier and
the second a logarithmic one, (nevermind the values of the ...
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Very low RF-DC conversion efficiency in ADS (SMS7630 & HSMS-282E)
Simulating RF rectifier in ADS (2.45 GHz, 5 dBm). Using HSMS-282E gives 11% PCE, SMS7630 gives 20% PCE. Matching is correct (good S11). Using SPICE models from datasheets. Load = 2 kΩ. Using HB with ...
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Peak rectifier analysis
I am trying to analyse the attached peak rectifier, but I have some difficulties understanding the obtained values in the LTSpice, because they do not match my calculations.
For example, the ...
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Falstad: what is this sorcery? Unusual full-wave rectifier
It is one of the available circuits on Falstad.
Unless I am missing something really obvious, and I would feel really stupid in that case, I find this circuit very confusing despite its simplicity.
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Can line reactors be used for PFC chokes in high current Vienna rectifier?
I am working on a system where a Vienna rectifier will be used as the active front-end rectifier with power factor correction (PFC).
The input current into the system, and through the inductors, are ...
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Why do we desire line-frequency reactance greater than 2% of base impedance in 3-phase diode rectifiers?
In Ned Mohan, Power Electronics, ISBN 9781118074800, p. 113, Ch. 5 Rectification of Utility Input Using Diode Rectifiers, the following statement is made without elaborating,
The figures referenced:
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How do I connect a PLL sensor on transformer output with two secondary windings to a diode rectifier load?
Background:
I am working on a project of modernizing a system for a lead acid battery charger. I will do this with a Vienna rectifier, that needs the current angle, that I get from a PLL, for control.
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Circuit with 2 AC Voltage Sources and 2 Ideal Diodes
V1 = 100sin(wt) and V2 = -200sin(wt). I am trying to understand FB and RB with ideal diodes better and analysie the voltage across D1 and R_L when (state 1) 0 < wt< pi and (state 2) pi < wt &...
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Can I rectify the output of a VFD?
I would like to rectify the output of a VFD to create a variable DC power supply. Is this possible?
I was going to vary the DC voltage by varying the output of the VFD (V/Hz). The frequency would ...
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How do I pick capacitors for high power, high RMS capacitor current Vienna rectifier?
I am designing a Vienna rectifier as a first boost stage in a lead-accid charging station.
The input voltage to the system is 110 V L-L, and peak power is around 18,5 kW.
I have succesfully simulated ...
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Practical advice on using common diodes in series for voltage regulation
I have plenty of spare diodes, and a lot of Li+ ion powered flashlights that have dead batteries (batteries which I plan to remove), I want all flashlights LEDs repurposed them for my old AC 6 volts ...
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LTspice Simulation of AC-DC Rectifier Shows 0V Output
I'm trying to simulate this AC-DC rectifier circuit for power supply and expect to see a ~320V DC output, but the simulation shows a short circuit (0V output and ~80A input current).
I must be missing ...
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Are grounds of 1-phase and 3 phase rectifier DC output common if they are fed through same 3-phase power source?
I have a 3-phase power source (consider 3 lines L1 L2 L3). I am using all 3 lines for a 3 phase rectifier(L1 L2 L3) and 2 lines from the same 3-phase power source (consider L1 and L2) and feeding them ...
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How to correctly measure the Schottky dioded forward voltage
My goal is to check the forward voltage of a schottky diode.
To reach this, I'm using a multimeter with the Diode Test feature, but I'm finding a different value than the expected one.
Multimeter ...
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Three voltages with a single center-tapped transformer
This is not as much a practical problem, as just an excercise: I have a center-tapped transformer, which has 2x9V on the secondary (aka "9-0-9"). I want to generate approx. 12V, 24V and 48V ...
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No Output Voltage from Voltage Doubler Circuit in Ansys Nexxim
I am simulating a voltage doubler rectifier circuit in Ansys Electronics Desktop 2024 R2 using Nexxim. I have connected:
A sinusoidal input source (VSIN) with Pin = 5 dBm, impedance 50Ω.
A matching ...
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6 pulse diode rectifier
I want to analyzing the relationship between capacitance and output DC voltage (Vdc) in a diode rectifier simulation.
Generally, it is expected that increasing the capacitance improves the smoothing ...
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Single-phase full-wave rectifier with inductive load
A rectifier shown below is for a fully inductive load with a power of 10 kVA (18).
Draw and calculate the output voltage waveform, the waveforms and magnitudes of the currents \$i_1\$, \$i_2\$, and \$...
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Importing Schottky diode models (e.g., HSMS-282E) into Ansys Nexxim for RF rectifier HB analysis
I'm using Ansys Circuit Simulator (Nexxim) to perform Harmonic Balance (HB) simulations for RF energy harvesting, specifically to evaluate RF-to-DC conversion efficiency using a Schottky-based ...
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How to improve discrete active rectifier circuit
This circuit is commonly seen, a simple active rectifier:
simulate this circuit – Schematic created using CircuitLab
Just showing the half-wave version here, as it's also convenient to ...
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using a switching converter in front of an existing DC-DC converter for "smoother" operation
I have a DC-DC converter making a 13.8V (25Amps) output from a 10Vdc to 40Vdc input. The input is coming directly from the output of a 3-phase Full-Wave bridge rectifier (varying between 25 to 250 Hz) ...
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Best way to rectify low frequency AC voltage
I need to build a circuit that can rectify an AC voltage coming from a scooter engine to bring it to a stable 5V DC.
The main problem is that the AC voltage source has a variable frequency that varies ...
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Active Front End Rectifier - Leading current issues
I am currently working on an active front end rectifier control. More specifically, I am using dq control, setting Id_ref to DC link capacitor PI controller output and Iq_ref = 0. And switching ...
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Identifying Diode or Rectifier on FET Board
I'm looking for some guidance identifying this component, in order to find a replacement. This is from a magnum-dimensions 3000 watt inverter charger. These components are on the bottom of the FET ...
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Relation between Power supply and CMRR
This is from the analog enginneering book by Sergio Franco (Link to pdf), which mentions how to find line regulation for the circuit shown in figure 11.4 (Page 540). But I didn't understand how he got ...
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CWVM (Cockroft Walton voltage multiplier) rectification problem
I am running my own power oscillator and CWVM into a tunable load. My output voltage is rectified, but not the current. I'd like to rectify the current as well. Is this not the case with rectifiers?
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Full wave rectifier without centre tap
I had a discussion with a peer regarding a full wave rectifier.
In case of full wave rectifier without centre tapping how would it behave.
I argue that it wouldn't work at all as in each half cycle ...
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Half-wave rectifier for high-frequency signal
I am trying to make a half-wave rectifier for an RF signal, but it seems that the diode is not doing what I expect it to do, which is blocking the negative voltages. Instead, I get the same sine wave ...
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Understanding a complex rectifier circuit
I am currently trying to develop a rectifier circuit that delivers +18V, -5V. I found this circuit:
which works when simulated in LTSpice. However, I am struggling to understand why it works, and the ...
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Efficient rectifier for bike dynamo, LM74670
The question is relative to bike dynamo (actually an alternator) rectifying, the main goal being to minimize power loss. The system being mounted on a bicycle, space and weight are also a concern (so ...
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Select the maximum voltage from 2 synchronized alternating current sources
I have two phase-synchronized AC circuits, A and B, derived from a single master AC source. Depending on the state of a switch in the system one of the circuits will be 120 volts while the other will ...
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Low Power Electro-Mechanical Battery Charging System
This is my first time posting in this forum. It was recommended to me by a friend. I have a background in mechanical engineering and am looking for some help regarding battery charging.
I have ...
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Addressing Ripple Voltage and Unequal DC Currents in AFE System
We are operating a Variable Frequency Drive (VFD) fed from an Active Front End (AFE) via DC/DC converter. The AFE is directly connected to the grid via an AC transformer.
We’ve observed the following ...
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Trying to replicate a full-wave rectifier circuit in ngspice, but I'm running into an issue where the output isn't behaving as expected
I am in 12th grade, and I have just started learning ngspice. I was experimenting with a part of a circuit that works as a full-wave rectifier, which I found online. I was trying to apply it and ...
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BC547 transistor rectifier circuit with diodes 1N4007 and capacitor
I CANNOT DO THIS ON BREADBORD CAN YOU PLEASE HELP OR PROTEUS IMAGE IS ACCEPTABLE :)
Circuit Explanation
Power Supply (VDD):
A 15V DC power supply is used to power the circuit.
Input Signal (Vin):
A ...
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Finding capacitor voltage in this seemingly simple rectifier circuit
I've been experimenting with a simple rectifier circuit and wanted to share some observations. Without R1, the circuit functions as the well-known half-wave rectifier, where the capacitor quickly ...
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Simulating a basic bridge-rectifier circuit
I went through this SE post before asking my question:
How do you design a bridge rectifier circuit?
I have been continuously trying to simulate bridge-rectifier circuit in KiCAD and have kept failing....
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How to get or convert to +12V from -48V telecom power supply rail
I want to convert the -48V from rectifier output of telecom equipment to +12V DC.
I'm considering the following schematic for that purpose:
The rectifier controller has -48V DC and +VE DC bus bar, ...
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Diode SPICE model for the HSMS-2860 in CST schematic
Trying to create diode in CST schematic but getting this error.
Use same values and import it in CST as .lib file (notepad file names as .lib). Transmission lines used for impedance matching.
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Precision Full-Wave Rectifier doesnt work properly
I’m having some frustration with this circuit (Precision Full-Wave Rectifier) as shown in TI Precision Designs:, although I’m using an LM358N, the document references the OPA2211. I simulated the ...
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How to calculate efficiency of this half wave rectifier circuit in LTspice?
I have a project to simulate fast-charging power supply, and I want to find the efficiency the power at the output is 48w but at the ac supply (311.13 peak V) and (i peak 3.87 A). I don't know how to ...
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Why is my full wave rectifier circuit not working?
I built the following full wave rectifier circuit. The negative waves should be flipped to positive waves but they are completely cut off. Why are the negative waves cutoff and are not flipped ?
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Simplest way to find peak capacitor voltage in this circuit?
I'm curious about how the circuit diagrammed below can most easily be analyzed without the use of a circuit simulator -- the old fashioned way, by hand.
All I'm interested in calculating is the ...
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MOSFET rectifier is outputting a strange waveform at higher voltages
With the help of the people who commented on my last post, I finally got my MOSFET rectifier to work! Couldn't have done it without you!
After some tests, I noticed that the waveform begins to get ...
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Tried making a "poor man's" active/MOSFET rectifier. It doesn't work, and I didn't expect it to, but I don't understand why
I attempted to design and assemble a "poor man's" 3-phase AC rectifier that uses MOSFETs without being driven by a gate driver.
The only thing driving the gates are the opposing phases.
In ...
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Heatsink can cause a shortcircuit what kind of problem occurs?
I'm not sure what will happen in this kind of scenario I'll share the photo of two diodes and basic connections below.
These two diodes tab points are actually connecting same node because of tab is ...
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Power output of a full bridge diode rectifier
Assume a simple circuit with a 12 V (RMS) AC supply and a 100 ohms load resistor. The power dissipated is P = V^2/R = 1.44 W.
Now assume that a full bridge diode rectifier (without filtering) is ...
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Trouble getting current form BLDC generator
I am designing a battery charger using a BLDC motor attached to stationary bike, I was giving this project hoping to fix the current output because is delivering low amps to the charger even at ...
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ID & Possible Substitutions for Blown Old Vishay SMD Component
can anyone please identify the component "VD20" (Marked SJ 47A with Vishay logo) pictured in the attached images. There are 8 of these similarly marked components still intact on the board. ...
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Full wave bridge rectifier with Pi or T filter simulation won't converge
I'm designing a full wave bridge rectifier and want to compare a pi filter and T filter after the rectification. I intend to add a transformer at the input and a buck-boost converter on the output. ...
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