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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Dual Dc regulated voltage circuit design

I'm working on my term project which is designing a dual DC regulated voltage that gives a DC voltage between +or-ve 3 to +or-ve 15. I have completed the testing for positive DC output part, but I ...
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14 views

Multiple Oscilloscope measurement in Multisim with small Variance

I have a design that consists of several stages, it's Dual DC Regulated DC power supply, using transformer, bridge rectifier, capacitor filter and regulator. We add the components one by one and each ...
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3answers
72 views

Why is the rectifier necessary in this circuit?

I asked a previous question about this circuit: I am fairly confident that I understand why the transformer coil only sees something like 2V. What I am now unsure about is why the rectifier is ...
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2answers
271 views

Help me understand this load detecting circuit

I'm looking at this circuit: Which has come from here The claim is made that "it detects a voltage drop across a large bridge rectifier that acts as a high power shunt", which is referring to the ...
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0answers
29 views

a Half Rectified AC, filtered by an inductor in series

What does a Half Rectified AC, filtered by an inductor in series' Voltage will look like?? I think it would be still pretty much the same, or will it be much different than that?
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1answer
34 views

Using an AC speed controllet with an rectifier and dc motor

I salvaged a 12 amp motor from an AC lawnmower and wanted to use a motor controller to reduce the speed. This is the controller I used http://www.amazon.com/gp/aw/d/B00GMBYFRK. The motor is a dc ...
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42 views

led light engine design

i want to know -How to connect the led in series and in parallel according to the given watt? if we have:-7watt-170ma current,45volt,current tollerence-160 ma we have led of:- (1) 0.2watt (2)0.5watt ...
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1answer
67 views

3-phase Brushless Motor - Are Volts and Amps at (X)RPM equal/similar when used as Generator?

If I have a Brushless 3-phase motor that spins at 3000rpm when given 6.0A @ 20v (no load) will it produce 6.0A and 20v (or anywhere close) when used as a generator and spun at 3000rpm?? And i suppose ...
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1answer
25 views

Continuous charging and varying load on 48v AGM - Will an ESC work with a battery that is being charged?

So, in a lightweight IC/electric hybrid motorcycle I am using a small 4-stroke engine to turn a Brushless RC motor (the generator). Then a 3-phase rectifier bridge to supply 59.2v DC @ 12amps to a 48v ...
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0answers
48 views

Regarding bridge rectifier verification [duplicate]

I am trying to verify my bridge rectifier for proper functionality. It can be depicted by the above diagram. When I place the positive terminal of my voltmeter (switched to diode mode) on one of the ...
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2answers
366 views

Why do we rectify then invert current in induction heaters?

I was trying to build a simple zone refining prototype, so I thought of How to simplifying induction heater for zone refining? I throughly read What does a beginner need to know to build an inductive ...
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68 views

Under what conditions will the following circuit work?

The following circuit that only has a single supply wire and not grounded (see below). Under what condition can this circuit be made to work (supply a small amount of rectified current, say 5mA). In ...
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1answer
78 views

What happens when you rectify phase cut current?

Forgive the simplicity of the question, since I'm not a professional, just a tinker with a soldering iron. Just dancing with the idea in my head, I believe that if I rectify a current that's been ...
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1answer
75 views

What happened to my second half cycle of my half wave rectifier?

When I'm doing a simple half-wave rectifier with the set-up as shown above (Note: Diode D2 is not connected) and connected terminal 5 and 4 with positive and negative terminal of oscilloscope, this ...
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2answers
396 views

My half wave rectifier graphic is wrong

Here is the circuit we used (BT169 thyristor): And this is the output: In theory it should be a straight line when AC source goes negative. The question is "Why does it go into the negative ...
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1answer
65 views

Transformerless rectification is giving out AC component [duplicate]

I want to convert 240V AC 50hz to 12V DC without transformer.I want the output (12V) to drive 25 white LEDs.The circuit is giving an output of ~14V DC.But the problem is that it is also giving out ...
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1answer
97 views

Is the output of a smoothed rectifier same as the DC output of a battery?

When rectifying an AC signal to DC through full wave rectification and smoothing using capacitors, is the output same as that of a DC battery?
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1answer
89 views

how to design a power supply with a supercapacitor

I'm ask to design a power supply unit which could change its voltage from 0 V to 20 V DC and its current to 0 A to 5 A. The maximum internal resistance of the unit is 1 kΩ. At the same time, it could ...
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2answers
79 views

why the PIV of full wave rectifier is 2vm

Peak inverse voltage (PIV) is the maximum voltage a diode can handle in reverse bias condition. Why does the PIV of the diodes in a full wave rectifier need to be 2×Vm? (where Vm is the peak ...
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1answer
39 views

Strange reading from rectifier

I am new here so sorry if i don't ask this question correctly. I am currently trying to test a bridge rectifier from jameco(part # 103000) I am applying a 60hZ wave from wave generator with 1V peak ...
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2answers
106 views

How to design capacitance value for a given full wave rectifier [duplicate]

I have been searching for design equations for 5v regulated power supply but unable to figure it out. Please check the below circuit diagram Could anyone explain me why 470uf ? why not 2uf? how can ...
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2answers
133 views

How does a bridge rectifier work exactly?

If this question was posted before, please let me know. I searched for "how does a bridge rectifier work" and did not find an answer. The part that I especially find confusing is when I have the ...
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1answer
67 views

Trying to understand flyback diodes and general diode orientation

Let's start with this: I know the top image is of a flyback diode. I also get that its purpose is to protect the power supply from a voltage spike when the electromagnet releases. So I've gotten ...
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15 views

B6 rectifier if one thyristor's control device is damaged

This one is a task from the last year's exam in electronics. I have absolutely no idea how to solve this. The task was: a B6-rectifier with thyristors, trigger angle 30°, but the control device of ...
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2answers
79 views

Why does a large filter capacitor draw large (peak) current?

In my book it says that in a diode rectifier the capacitor gets charged close to the peak of the ac voltage. Is it true the larger the (filter) capacitor the larger the peak current drawn and if so ...
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172 views

Precision high speed peak detector

As a follow-up to my previous question, where I seek to determine the amplitude of a 2 MHz sine wave, I've settled for an op amp based solution. To recall, my input has a maximum 240 mV amplitude -- ...
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73 views

How to adjust the offset of a full-wave precision rectifier?

I've made a full-wave precision rectifier with TL072, for a vu-meter, and the first 3 leds are ON without signal, because I have +15mV offset at rectifier output and the levels for leds are: led1=7mV, ...
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2answers
1k views

Half-wave diode rectifier - is textbook wrong?

I've noticed that in all resources on diodes and rectifiers, they show the output voltage as the positive half-wave of the input signal. However, that seems wrong. I understand that there's a voltage ...
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1answer
338 views

What is the maximum frequency a bridge rectifier can handle?

I was designing a basic power supply with frequency ranging from 50-60Hz and thought about using this bridge rectifier KBPC50005. I cant seem to understand the range of input frequencies it can take, ...
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1answer
69 views

Which precision rectifier should I use for a 60dB LM3915 Vu-meter?

I want to make a 60dB Vu-meter with two LM3915 chips. In the datasheet is recommended to use an external precision rectifier and they give two type of rectifiers: half-wave and full-wave. My problem ...
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121 views

Will this circuit work as a AC-DC-AC rectifier-inverter?

I'm pretty sure I'm missing one or more things from this circuit and can't figure out what (new to this)! The end goal is that an alternating current will come in, run through the rectifier, then ...
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400 views

Determining amplitude of a 2 MHz sine wave

I'm designing a class E resonant inverter at a switching frequency of approx. 2 MHz. I need to control the inverter so as to maintain a constant current at the load. My strategy would be to put a ...
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1answer
296 views

Connecting center-tapped transformer to earth ground; or, why am I being electrocuted?

Silly question here. I've wired up a full-wave rectifier using this dual-secondary transformer. If you want to check my wiring, I connected red-to-orange to "create" the center tap (I assume this is ...
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2answers
96 views

Full wave AC Voltmeter Vs True Rms Voltmeter

Does a full-wave rectification AC Voltmeter give the same indication as a true rms voltmeter when you measure a 50 Hz sine wave?what happens if the the sine wave is clipped by an inadequate ...
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2answers
116 views

RMS or effective ac voltage component of a full wave rectified sine (not filtered)

Ignoring the voltage drop on the diodes, for a full wave rectified DC,can I say that: 1) Vrms of the original AC = Vrms of the rectified DC. ( I have just flipped one polarity. Power is same) 2) ...
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122 views

Example circuit with an F12C20C dual rectifier?

I've salvaged a MOSPEC F12C20C Dual Power Rectifier from an old PSU. I've been looking for example circuits that would use this component, and an explanation of how it works but I've only found its ...
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1answer
213 views

SMPS Design Transformer Core Selection

I'm trying to construct an SMPS power supply with 230VAC at 50 Hz input and 5.6V/2.5A output. Here is the schematic: The design was optimized with EE19 core selected and I am expected to optimize ...
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0answers
60 views

The current and power factor in the Full wave rectifier

I have some questions and I hope you can help me. All he question is about a Full wave rectifier with smoothing capacitor. Why the supply current in is big ? and it is not good to have large peak ...
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2answers
187 views

effective voltage of a sine wave

I am looking for effective voltage values for calculating power in a AC sine wave supplied circuit with a resistor under 2 conditions : full wave rectification; half wave rectification. I have ...
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102 views

Bottle dynamo (bike generator) rectification and stabilization circuit for LED light

A friend of mine would like to convert her bottle dynamo (bike generator) to run a LED light. The light needs to stay on for maybe 90 secs when the bike is stopped, and needs to blink (using a ...
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2answers
121 views

Rectifier for 3A load [closed]

What kind of rectifier circuit would I need to build a 25-30V 3A power supply with an input voltage of 24V AC?
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2answers
85 views

Diode detector strange discharging

I am building a diode detector circuit in order to detect ASK signal with 125 KHz carrier frequency and 8 KHz data rate. However, I realized I would say a strange behaviour and discharging of ...
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1answer
191 views

AC-DC voltage doubler rectifier

I designed a 50 Watt voltage doubler rectifier with rated input 12 VAC and output 48 VDC. The circuit configuration and simulation result are presented in figure below. 2 unit IRFP460 power ...
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votes
1answer
81 views

Connect a vibration motor to a headphone jack

I would like to solve the following problem: I have a a variometer-device for an RC plane. Its receiver has a standard 3.5 mm headphone jack that provides a beeping sounds to my headphones. I would ...
5
votes
2answers
302 views

Another 'What is this component?' question

I have looked through all the other 'what is this component' questions and have not found my component. I am looking for the component in the red box. It is from a rectifier circuit off a 1973 9.8 hp ...
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2answers
920 views

What's the purpose of the full wave diode bridge in this DC-DC power supply?

In the following power supply circuit, there is a full wave diode bridge (full wave rectifier?) after the DC Input. I can see how we need a full wave rectifier after an AC input, but why after a DC ...
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190 views

7809 Linear Voltage Regulator Outputs in Series

I'm building a linear power supply that converts 120VAC mains voltage into multiple 9VDC, isolated outputs. I'm using this transformer that has the proper primary winding and 8 secondaries that I'll ...
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Design help for my 1A variable power supply

In a 1A Variable Power Supply circuit given below is it possible to use a 2A transformer and 1A bridge diodes.
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2answers
106 views

Is it possible to calculate the load resistance in a full bridge rectifier when given only power, inductance, and input voltage?

I'm given a full bridge rectifier circuit with values for power, industance, and RMS input voltage: [P = 380 W, L = 85 uH, Vs = 115 V]. The question states to 'select' output resistance for a ...
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1answer
124 views

Selecting diodes for HV full bridge rectifier

I'm using a current-fed Royer self resonant circuit to generate 1kV DC output voltage. The transformer is producing a sine wave of 100kHz/2kVpp (Cap-Royer = 100nF). At the output of the transformer I ...