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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How to light one or some LEDs with extremely low current?

My device, which is called a triboelectric nanogenerator, can generate from about 20 to 50 volts open circuit (in AC) but only 0.1 micro ampere (100 nano ampere.) Are there any methods to light up ...
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2 answers
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MCU not turning on via high side PMOS or PNP BJT

This board basically senses 24 VAC and drives a relay using the attiny10 as delay timer (already tried 555). The board will only be driving a few LEDs < 12 mA and a 5 V relay with ~40 mA coil ...
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Rectifier circuit behavior - Need an intuitive understanding

Case1: OUT Series res = 10 ohm -> spiky input current reaching upto 15 A -> capacitor charging fast After a long time: Case 2: OUT series res = 100 ohm -> almost sinusoidal input current ...
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Need help fixing an old TIG welder, Relay is not working and I can't figure out why

I have an old TIG welder that uses a relay to HF (High Frequency) start. I had a problem with it about a year ago and cleaning seemed to work, but now it's not even getting 12VDC to it. Here's the ...
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-2 votes
2 answers
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What is this component in a power supply?

We bought a Cisco 6500 series 6 kW PSU and took it apart. This is a module connected immediately to the inputs of the power supply unit. Does anyone know what it does?
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What are the assumptions involved in below rectifier output waveform?

The below waveform shows peak current occurs at the instant when diode starts conduction. Why is the peak current not happening at the max input voltage point? Usually the rectifier output caps are ...
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Getting AC output from purported DC-DC boost converter. What gives?

Hey gang got a "thing" here that has me confused. Briefly, I'm working on a project that needs +5VDC to power a load, but also needs -5VDC at one point in the circuit, to send to the Gate of ...
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1 vote
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What will the output voltage will look like if we have non sinusoidal AC paired with capacitor?

I am currently studying for exam and a lot of questions are popping up in my head. What will Uout of a full wave bridge rectifier with a capacitor look like? I am talking about square, trapezoidal, ...
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How to make a MHz-fast, 5 volt thyristor with discrete components? [closed]

Off-the-shelf thyristors are optimized to switch at mains frequency, - 60 Hz in the U.S.A. In my application, I need MHz speeds, 10 to 20 watts, 5 to 10 volts. Is it possible to emulate thyristor ...
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Difference between Harmonic Balance and Transient solver in ADS

I am performing a simulation of a half wave rectifier (HWR) in ADS. I had developed a MATLAB code for Harmonic balance solver and Transient solver in MATLAB. The code gives comparable results when ...
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Breadboard Layout Validation

I have a breadboard with a bridge rectifier circuit that I am hoping to have someone validate for me. The circuit with breadboard pins is: And a picture of my breadboard is: Thank you!
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Full wave active rectification for lower voltages?

I have been following these youtube tutorials on active rectification to learn more about the topic. https://www.youtube.com/watch?v=VR456CsHYx4 https://www.youtube.com/watch?v=arvNukW-jeo I simulated ...
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DC leakage in single and three-phase rectifier (Electric vehicle chargers)

It seems that the IEC 61851-1 standard ask for a device monitoring DC earth current for any EV charging station, either single or three phases. What I'm wondering, is, which topology of charger, or ...
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HV Rectifier output for APD biasing

I am trying to convert low 5V or 12V to -200V using this device. Which converts it using transformer and rectifier at the output: Can I just attach HV OUT to bias APD detectors? Or is there any ...
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How do I calculate the potentiometer value for the controlling of Alpha angle of a phase control IC? [closed]

The datasheet suggests to use a 10Kohm pot to control the Alpha angle, however no matter how much I try I can't control it. I used 1Mohm pot instead and now I can control it more, but still with very ...
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2 votes
1 answer
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Why aren't smoothing capacitors used in smoothing the output of fully controlled bridge rectifiers?

I was wondering why smoothing capacitors are not used in smoothing the output of fully controlled bridge rectifiers, like it is used in the uncontrolled bridge rectifiers.
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6 votes
2 answers
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Why is the telecom input power supply range 36 to 72 V (polarity ignored)?

Why is the telecom power supply voltage level specifieded with a wide range: 36 to 72 V? Is it because the rectified AC voltage would have variations as per AC line variations? We could easily get a ...
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3 votes
1 answer
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Noise of a precision/active rectifier

I am trying to build a precision rectifier circuit to implement AM demodulation in a sensor signal chain. For now I have calculated the sum RMS noise of the total signal chain except that of the ...
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What affect peak current in an RL load rectifier circuit?

so I'm running a half wave RL rectifier in simulink. I don't have much knowledge. May I know what affect the peak current in the half wave rectifier circuit (the theory behind it) and how do I ...
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4 votes
6 answers
538 views

Is full wave rectified AC, without a smoothing capacitor, okay for switching a DC solenoid and a DC relay?

I have a circuit where the 24V AC secondary voltage of a transformer is full wave rectified to DC. The only parts that this circuit is connected are some 24VDC solenoids and a 24VDC relay. The ...
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Is this output signal good to drive a thyristor gate?

I have the following signals: Blue is the input to the 10ohm resistor connected to the gate of the 2N7000 transistor Yellow is the output of the pulse transformer GG3 and K3 Is the output of the pulse ...
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1 answer
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How does the voltage change from DC to AC in capacitor//resistor circuit?

I was asked to calculate the expression for the voltage for this circuit in DC at the essential node $$v_o(t)$$ From the input voltage $$v_i(t) = A\sin(wt)$$ I did it for DC with nodal analysis over ...
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Confused in readings of oscilloscope

I have this reading of a oscilloscope for a half wave rectifier: Pk-Pk voltage is 17.6V. The channel is set to 5V division. I asked my dad who is a electric engineer and he told me that Vp = 17.6/2 = ...
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1 answer
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Need help with simulation of three-phase active rectifier on LTSPICE

I have already successfully simulated a three-phase rectifier on simulink. However, I wish to implement the same on LTspice because I would have liked to see the effect of using non-ideal components. ...
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2 votes
0 answers
37 views

Triboelectric Nanogenerators Full bridge rectifier design

I am working on energy harvesting from Triboelectric Nanogenerators abr. TENG (mechanical to electrical high impedance converters) and wanted to validate my understanding of the following circuit and ...
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0 answers
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Why does voltage jump up with a rectifier circuit?

I've got a need to measure the integral of voltage with respect to time. I'm measuring a 25V AC power source through one of these voltage dividers to get it down to a workable 5I. I then rectify it ...
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2 answers
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Half-wave rectifier with filter and clipped input signal in oscilloscope

When building a half-wave rectifier with a capacitor filter for my electronics lab, there was significant clipping at the peaks of the input signal. When looking at the .csv file pulled from the ...
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1 vote
1 answer
169 views

Which is better, the MB10S or the MB10F?

I am replacing a blown MB10 rectifier IC on a small LED power supply. The letter could not be read anymore so I don't know which one to get. The S or the F variant. In the datasheet the electrical ...
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0 answers
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What is a field effect rectifier diode

ST offers what they call field-effect rectifier diodes. Does anybody know what that actually is and how they work? Application wise it seems very similar to a Schottky diode (low voltage drop,) but ...
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1 answer
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Boost PFC converter stepping up voltage but unable to shape the input current

So, I have designed the following boost PFC circuit in simulink: This is the DC output voltage: But this is the input current: I am trying to tune the PI control but nothing works out. The PI ...
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1 vote
3 answers
83 views

How does the RMS voltage capture the time varying part in the conversion ratio of the half wave rectifier?

I am studying conversion ratio of a halfwave rectifier from here. It says that Conversion ratio (also called "rectification ratio", and confusingly, "efficiency") η is defined as ...
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2 answers
58 views

Which replacement standard recovery diodes do I use for a high voltage full bridge rectifier in a valve guitar amplifier?

The original diodes were four IN4007 (1A 1000V PRRV.) If I replace them with IN5408RGL (STANDARD DIODE, 3A, 1KV PRRV,) basically upping the current to 3A, will this have any detrimental effect on the ...
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3 votes
3 answers
284 views

Not able to figure out the logic behind sense circuitry of a AC/DC converter

In the below circuit, why would there be 2 extra diodes (D3 and D4) to sense AC input voltage? If D3 and D4 act as rectifier, wouldn't it be sufficient to directly sense at the output of bridge ...
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2 answers
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Is it appropriate to model a DC/DC converter as a variable resistance if I have input voltage and current datapoints?

So I am designing a circuit in MATLAB simulink which is basically a rectifier followed by a DC/DC converter. Both simulations are working perfectly individually. However, when I attach the DC/DC ...
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0 answers
37 views

Connecting a rectified and smoothen DC to an inverter

I'm preparing to build an axial flux generator and my plan is to generate 24v from the generator, rectify it, smoothen it with a super capacitor and then connect it to a 24v inverter. I want to avoid ...
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3 votes
3 answers
837 views

Transformer is not essential in half wave rectifier

My textbook for basic electronics states that Transformer is not essential in half wave rectifier (advantage of half wave rectifier)... But why? And there's another statement saying that half wave ...
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5 votes
1 answer
229 views

Need help with simulation of three-phase rectifier with hysteresis controller

I am attempting to design a closed loop three-phase rectifier with hysteresis control using MATLAB simulink. The outer loop compares output DC voltage with reference voltage, given to a PI controller ...
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3 votes
3 answers
100 views

Half-wave rectifier- How does the supply line current affect a transformer

i Have this half-wave rectifier circuit. i have placed a current probe on the input in order to measure the waveform of the supply current. The waveform is shown below. My question is what effect does ...
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0 answers
81 views

What happens when a diode goes "OPEN?

What happens when a diode goes "OPEN?" The output consists of peaks and spaces: When an electrolytic is added, the output voltage looks something like the following, depending on the value ...
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4 votes
2 answers
289 views

Why can't an inductor be used in a half wave rectifier?

I am studying filter circuits and there I spotted one sentence as disadvantage of an inductor filter, Inductor filter cannot be used in half wave rectifier . Why? I request simple answer because I ...
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0 answers
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Ripple of half-wave rectifier

I have an output sinusoidal voltage \$v_o = V_msin(\omega t) \ne0 \$ for \$ 0 < \omega t < \pi\$. The RMS value of \$v_o\$ is $$ V_{o, RMS} = \sqrt{\frac{1}{\pi} \int_{0}^{\pi}[V_m sin(\omega t)...
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-2 votes
1 answer
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Why is the capacitor filter in parallel with the load and the choke in series in a choke input filter?

What will happen if we interchange them? In a capacitor filter, the capacitor discharges through the load, it was connected in parallel to load. From what I have concluded, if the capacitor is in ...
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0 votes
3 answers
148 views

Transformer - 2 Wires in and 3 wires out - How to connect ground?

I have the following transformer: And the following power cable: This is for a dual-polarity power supply for some audio circuits. How should I connect the ground pin to this circuit? Can the ...
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0 votes
2 answers
253 views

How is the peak inverse voltage of diodes in a center tapped rectifier twice than the bridge?

I am not able to understand how the PIV becomes twice in case of centre-tapped rectifier. PIV is the maximum inverse voltage that a diode can handle before having a breakdown. For a half wave ...
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-1 votes
1 answer
113 views

How does this circuit act as a half wave rectifier?

I'm having trouble to understand how this circuit operates exactly. The op amp is an LM339 from ST (datasheet link). The circuit in question is as follows: The op amp should be a comparator, but the ...
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3 votes
5 answers
1k views

Can a diode bridge be connected to a high input voltage?

I'm trying to rectify an AC current at 220V. Many written tutorials don't mention any transformer before the diode bridge and many video tutorials use transformers that provide an output of 6V or more....
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1 vote
1 answer
88 views

Diode ratings question

Can I use a 1000 V, 3 A diode instead of a 400 V, 3 A diode? The dead diode is a uf5404, it was in a satellite receiver power supply. The only ones I can find in the market are fr307 and 1n5408. Here'...
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1 vote
2 answers
151 views

Do all AC-DC converters produce current spikes in input?

I am designing a simple rectifier circuit with LTSpice (I am planning to build one for myself) and I found out that AC-DC converters require PFC circuits to prevent huge input spikes (?). I tried ...
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1 vote
2 answers
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Current and voltage driven rectifiers

While going through resonant DC-DC converters, I came across two types of generally used rectifiers. The above image is current driven rectifier and it makes sense why one wants to drive it with ...
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2 answers
67 views

How does voltage distributes in full wave rectifier with resistive load?

I am a bit confused with how voltages distribute themselves in the circuit, for the positive cycle the diodes D1, D2 are turned on. We have positive input voltage terminal connected to D1's anode and ...
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