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.

learn more… | top users | synonyms

1
vote
2answers
68 views

Why do we need to rectify or amplify the current/voltage? [on hold]

I am a beginner in Electronics. What i read now a days in my text book is about diodes,transistors etc. They are used for some rectification and amplification etc ? I wonder why do we need to give ...
2
votes
1answer
245 views

Why would someone prefer halfwave rectifier over bridge rectifier? [duplicate]

The other day, out of curiosity I was measuring the current wave shape of a laptop charger. The wave shape indicated a spike only in one half cycle. I'm guessing half wave rectifier here. One thing ...
1
vote
1answer
29 views

Sensitive AC detector circuit

I built a field mill based on this video link. This device generates a sine wave, where I am interested in the amplitude. Once i have the peak, or average value (does not matter, but average would ...
0
votes
1answer
54 views

Bridge Rectifier questions

I need to build an ammeter circuit for a model train layout. I want to use an analog ammeter (I just like the look of them) but I have to do some special stuff because DCC (the control system for the ...
4
votes
1answer
439 views

Why such low voltage across my filtered half-wave rectifier?

Essentially my problem is this: I built a simple half-wave rectifier with some capacitive filtering, but I can't account for why my voltage is so low. Below is the circuit I built: Vs is 5V ...
4
votes
4answers
258 views

Full wave rectifier vs full wave bridge rectifier

What is the difference between the full wave rectifier and the full wave bridge rectifier? In other words what do we gain if we use the bridge? As far as I know both do the same thing while the bridge ...
0
votes
2answers
58 views

Amplify the signal from ACS712 to adc

I am trying to amplify the signal from ACS712 to read it better. The problem is that I am using an 8-bit ADC, and what I want to take measure are things like energy-saving lights, or other things with ...
0
votes
3answers
37 views

Direction of flow of current in secondary circuit in AC transformer/rectifier

In this transformer/rectifier if the current in the primary circuit is clockwise what will be the direction of current in the secondary circuit?Why? I'm feeling a bit confused about the direction ...
0
votes
1answer
37 views

ESC to convert AC to DC?

I'm starting a project where I want to use a BLDC motor as a generator. I understand that BLDC's need an ESC to be controlled. Essentially an ESC converts DC power into AC and provides the necessary ...
6
votes
1answer
128 views

Two-sided connectorless USB on a PCB

This question is inspired by Connectorless USB on a PCB. I saw a cool USB LED on AliExpress that can be inserted in either direction: I'd like to build a board with a similar symmetric ...
0
votes
2answers
56 views

Scr triggering design, shuld i use four pulses for each SCR ot two for each pair of the SCR?

I have used a TRIAC and an MOC3021 opto-coupler connected to a PIC16F887A to simulate a a full wave rectifier. I am now to design the same using an SCR h-Bridge. My question is, in order to trigger ...
0
votes
0answers
57 views

zener diode as rectifier in cheap mobile charger

Opened a very cheap mobile multi charger and find a zener (4.8V, 1/2W) diode is used as rectifier. Surprisingly it is giving ~ 4.9 V when no load and about 430mA to an old 3.8V torch bulb, almost ...
6
votes
2answers
316 views

Why does this Bridge Rectifier claim to have no [Diode] Forward Voltage drop

I was, "OK, this is feasible"... But then I traced how it worked and it simply blocked current through Drain and Source when a P and N pair are reverse biased; then when the other P and N pair are ...
0
votes
1answer
31 views

LTSpice Full Wave Controlled Rectifier Erronous SCR Breakover

I'm attempting to simulate a full wave SCR rectifier: However it is not behaving correctly. In my setup V3 controls one pair of SCRs, and V4 controls the other. All the math on the side is just for ...
1
vote
0answers
43 views

Will “dimmable” 120VAC LED bulbs work on half-wave-rectified power? [closed]

My stove's vent hood has a pair of 120VAC 50W MR16s with GU10 bases, e.g. these halogen bulbs. These are some of the last incandescent bulbs in my house, and I'd like to replace them with something ...
0
votes
1answer
51 views

How can an active rectifier block current?

This is a 2 part question for my understand about how an MOSFET/IGBT based active rectifier controls current. 1) Assuming a 3 phase active front end to a DC bus, and some huge load on the DC bus ...
0
votes
1answer
39 views

Calculating phase currents of an automotive alternator

I have an automotive (3-phase) alternator with peak rated output of 150A at 14V (after rectification, of course). How can I determine phase (AC) currents in this situation?
4
votes
4answers
426 views

Is a linear voltage regulator necessary in AC to DC?

I was doing research on AC to DC power supplies and I came across a lot of schematics that use regulators like the one below: credit: ...
0
votes
0answers
49 views

Pulse for IGBT Rectifier in simulink

I have connected a Permanent Magnet Synchronous Machine(PMSM) to use as a generator(mechanical torque input -> 3phase output) to a IGBT bridge rectifier and I use PWM generator for the gate pulses. I ...
4
votes
2answers
88 views

Storing the the charge from a MOSFET Bridge Rectifier

I am using the following MOSFET Bridge to harvest AC bursts that coming off from a electromagnetic transducer. Infront of this circuit is a Super capasitor I have placed. I read the following on a ...
1
vote
1answer
48 views

Are pins of WOG bridge package numbered?

The WOG package used for a diode bridge looks like this: As I'm preparing a PCB layout footprint for this device, I need to assign pin numbers. Those pin numbers map to the schematic and ensure the ...
0
votes
1answer
24 views

implications of difference between RMS and mean in rectified and non rectified graphs

I have a project relating to EMG signals and i did a full wave rectification to zero for the graphs before calculating mean and RMS of the graph. My question is, would it make more sense to find the ...
0
votes
1answer
46 views

Why is the ripple frequency in dc side of 3 phase full wave converter is considered to be 6 times that of ac side?

I can't find why is the ripple frequency in dc side of 3 phase full wave converter is considered to be 6 times that of ac side?
-1
votes
3answers
135 views

What's a freewheeling diode [closed]

I was studying single phase rectifier circuit with RL load. There I found that they are using a freewheeling diode in parallel to the RL load. So is a freewheeling diode different from a power diode ? ...
2
votes
1answer
103 views

In a simulator, outputing +/-5V peak AC through bridge rectifier then opamp buffer gives 5V DC output… software error or does this really happen?

In a circuit simulator I'm using it shows that if I run an AC voltage through a bridge rectifier and output that to a op amp buffer, the voltage at the input of the opamp (and hence the output) is the ...
2
votes
3answers
134 views

What is the use of diode? [closed]

I am confused about the use of diode. As I am look into the use of diode in Wiki, it mentioned one of its use is to be a component of rectification circuit. But will it cause damages to the diodes if ...
1
vote
1answer
46 views

Is it possible to power a solar MPPT charge controller from a backup DC power supply?

I have a solar setup for some computing equipment that is working pretty well for me (most of the time), however it doesn't have quite enough juice to make it through the night on very overcast winter ...
1
vote
1answer
50 views

How to set phase delay for a three phase igbt rectifier

I have a three phase igbt rectifier like so. three phase voltage = 690V. how to set the phase delay and DC link capacitor value(F) to get Vdc = 1070. I have updated the complete simulation with the ...
0
votes
1answer
151 views

IGBT vs. SCR rectifier

I simulated three phase rectifier using a thyristor like so: I get the expected result. But if I change the thyristors to IGBTs as shown below, it does not work. Why do these two circuits behave ...
0
votes
1answer
49 views

Explain trim pot for VU meter

I have the following schematic that is supposed to rectify the signal going to a VU meter and also trim it, so the user can adjust the position of "0dB". What I don't understand is why and how the ...
0
votes
2answers
84 views

Inrush current limiter 230V AC 16A (~325V DC 3,6kW ) - low power losses - safe

I need an Inrush-Current limiter and struggling with a good starting point. Basically I was thinking about using a NTC which then get short-circuited by a relais after a short period of time to ...
0
votes
1answer
68 views

Synchronous rectification simulation [closed]

I am (for educational and research purposes) trying to replace diodes with MOSFETs in a rectifier of a conventional automotive alternator (12V). Before I proceed with hardware implementation, I ...
2
votes
2answers
49 views

Effect of rectifier input frequency on output voltage

Does changing the input frequency of a transformer rectifier change the output voltage, given that the input voltage is constant with no voltage regulator or protection circuit on the output?
0
votes
0answers
45 views

Simulating input impedance of rectifier with known power

I am simulating a rectenna with a dipole antenna and a bridge rectifier in ADS. As a diode's impedance is dependent on the current, to accurately measure the input impedance of the rectifier, I want ...
-1
votes
1answer
76 views

Bridge rectifier homework

A bridge-rectifier circuit with a filter capacitor has \$R=100\Omega\$. The secondary transformer delivers a sinusoid of \$12V\$ (RMS) and has a frequency of \$60 Hz\$. The diodes have \$VD = 0.8 V\$ ...
0
votes
0answers
66 views

Could Pythagorean Theorem be applied to convert AC current to DC?

I'm new to electronics so I would appreciate simple answers. Since an AC signal is a sine wave and we know that we can phase shift to get a cosine wave, then we have available to us a sine and cosine ...
0
votes
0answers
65 views

Problem while sectioning ground on LM7805

The 9V input is from a transformer, which outputs 9V AC. The middle connection is the central turn of the transformer. As you can see on the picture, there is a switch between the central turn and ...
2
votes
2answers
134 views

Why does the diode current waveform look like this in a full-wave rectifier?

The oscilloscope trace below shows the output waveforms for the diode current (yellow) and the load voltage (blue) for a single phase full-wave uncontrolled bridge rectifier. The load attached to the ...
0
votes
2answers
97 views

Between a full wave rectifier circuit and a half wave rectifier circuit which has a better(i.e lesser) voltage regulation?

I know that voltage regulation is give by $$ V.R.= \frac{V_{nl} - V_{fl}}{V_{fl}} \cdot 100 $$ where \$V_{nl}\$ is the no load output voltage and \$V_{fl}\$ is the full load output voltage. I can ...
0
votes
1answer
66 views

What is an alternative to this rectifier? - GB14C40L [closed]

We've nearly completed an engine swap on a car, which needs to have a piggy back ECU called an EMU to run the new engine. The trouble is, the new ECU only sends a spark on two of the 6 cylinders. We ...
0
votes
1answer
285 views

How to use center tapped transformer's one connection?

Im trying to build a Battery charge controller described on this link http://www.circuitsgallery.com/2014/01/battery-charge-controller-circuit.html in the circuit they used a 0-15V/2A Transformer ...
8
votes
4answers
1k views

Why does current flow from the most positive to the most negative in three phase system?

I put the following circuit in a simulator to see how it works. I understood it but I have a question: At the time of the vertical green line, The simulator shows me that the current flows from the ...
0
votes
0answers
123 views

Rectifier input impedance does not change when load changes

I simulated a fullwave rectifier with LTSpice. When I change load resiter or smoothing capacitor and even both. Input impedance of the rectifier is still same. Any idea why is that? Calculated ...
2
votes
2answers
85 views

What's the real inrush current in my AC/DC rectifier?

I'm working with rectifiers and power supplies at the moment and I'm trying to reconcile simulations with real world observations about my circuit. It's a full-bridge diode rectifier (4x 1N5821's) ...
0
votes
1answer
155 views

Powering 100w 32v LEDs

I need to power many 100w 32-36V LEDs... and building loads of 32V PSUs is costly and time consuming. This is a bit of a crazy idea, and I'm aware that it's probably not the safest way to do this, ...
1
vote
1answer
135 views

Inrush current limiter for a high power rectifier

I am designing a 10 kW rectifier (single phase, 230 V, 50 Hz, 44 Arms, 62 App) with power factor correction (a bridgeless boost DC-DC converter working in continuous conduction mode). All works ...
5
votes
5answers
2k views

Could most AC devices run off of DC rather than AC?

To be clear - I have absolutely ZERO intention of ever doing this. But when I learned what a rectifier does (flip the negative portion of the voltage into positive), it occurred to me that it ought ...
0
votes
0answers
69 views

centre-tap full wave rectifier DC voltage

simulate this circuit – Schematic created using CircuitLab Taking into account the loss from the diodes and the ripple voltage, would the DC voltage across R1 be equal to: 11.26v Using ...
0
votes
0answers
63 views

dynamic model of three phase diode bridge rectifier

I need to develop a dynamic model of three phase diode bridge rectifier with RL load. Because I don't exactly know how to do that, I tried to identify all conduction states in which the circuit can ...
0
votes
3answers
230 views

How to convert 220V AC @50 Hz to 400V @ 20KHz?

Sorry, I may be asking simple question but I'm not specialized in electronics. What I want to do is to increase the voltage from 220V AC to 400V AC. Also I want to increase the frequency from 50Hz ...