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

5
votes
5answers
1k 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
42 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
1answer
70 views

how to chose diode for rectifier

i used 1N4007s diode to make bridge type rectifier and connected it to 220v 50 hz main supply, without using transformer it blew up. d21 d22 d23 and d28 is the place of those diode
0
votes
0answers
48 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
78 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 ...
0
votes
0answers
26 views

Trickle charge a 12v battery on a 3v system without shorting the spark plug

I am currently trying to charge a 12v battery off of a 3-6v source for my motorcycle. The motorcycle does not have a battery nor any ac light output on the CDI box. I found a supposed solution online ...
0
votes
0answers
35 views

Multichannel voltage/current measurement device

I'm building a 4 channel voltage and current measurement device. 2 channels for voltage (ac 0-300V rms and dc 0-300V) 2 channels for current (ac 0-5A rms and dc 0-5A) There is a central ...
0
votes
1answer
48 views

Ac to DC conversion

In a battery charger (ex.laptop charger), the ac voltage of 120volts is converted to a DC voltage to charge the batteries in the laptop. But, the maximum current available from a 120v socket is 15 ...
0
votes
3answers
65 views

Full wave rectifier above 0V

I have a 1 kHz sine-wave signal with an amplitude of 5V (peak-to-peak), and a +2.5V offset. I want to rectify the signal so that I only get the portion of the signal above 2.5V. If the signal ...
0
votes
1answer
50 views

step down switching frequency

If I have a power supply that outputs 32V,7A and I need to power an LED that requires 24V-2.8A, can i use this step-down module to power up the LED? ...
-2
votes
2answers
176 views

Why are home appliances and other devices made to operate on dc?

Why are home appliances not designed to work on ac?why cant we just stepdown the incoming 230V and design the systems to operate at low ac voltages,instead of converting ac to dc?
0
votes
0answers
67 views

Bridge rectifier on pcb

I am pretty much a newbie at pcb making, so please excuse me for asking dumb question. Do you see anything wrong with this. R is 1k and C is 4.7mF. I just want to make sure I do not burn anything ...
-2
votes
1answer
44 views

Common ground with two bridge rectifiers [closed]

I have a transformer with multiple taps on the secondary coil deliverin many different voltages and I want to know if I blow something up when I convert the AC of the transformer to DC with bridge ...
0
votes
2answers
47 views

24 VAC source unable to drive servo motor

Here's my power supply (schematic except without the transformer since my source is already at 24 V AC and using a 100 uF electrolytic as my smoothing capacitor): 24 VAC rectifier -> 100 uF smoothing ...
0
votes
0answers
36 views

How do I design my protection circuit?

I am making a rectifier to input 80V AC at 10Hz To eliminate the ripples, I'm using a capacitor whose value is 5mF. It supplies a load of 10mW (Resistive). What are the protective circuits to be ...
0
votes
1answer
47 views

Combining two different voltages into one regulated voltage at higher amperage

The Commodore 64 user port has a +5V supply at 100mA and a 9VAC supply also at 100mA. I need about 150mA from the port at 3.3 volts. Is there a way I can use both supplies to get the amperage I ...
0
votes
2answers
67 views

Rectifier design priority?voltage or current?

I'm curious..which one is better..have a high voltage or high in current? If i want to design a rectifier cct, which one is the main priority? Large load,higher voltage but less current will be ...
0
votes
0answers
45 views

Rectified voltage less than AC, what could be the problem?

simulate this circuit – Schematic created using CircuitLab V1 = V2 = 251VAC V3 = 502VAC V4 = 112VDC D1, D2 are BA259 rated at 1kV. What am I doing wrong with this center-tapped ...
0
votes
2answers
137 views

why do rectified voltage boosts after adding a capacitor?

So I found this 9V 1A AC power supply laying around and decided to make a DC source. I rectified and added a capacitor to make things a bit even. After adding a capacitor my voltage boosted from 9V ...
2
votes
2answers
70 views

single phase rectifier

hello can someone pleas help me to solve this problem this is the scheme I cant recognize where the voltage can turn because all the diodes are blocked
1
vote
1answer
132 views

Problem understanding the operations of capacitor

So far I've learnt about some different types of capacitor arrangements , such as coupling , decoupling , bypass , filtering , and smoothing capacitor. Decoupling and bypass capacitors are the same ...
1
vote
2answers
68 views

What would be the results of two bridge rectifiers in series?

What would be the side-effects of placing two bridge rectifiers in series? The question stems from reading how some devices are manufactured with a bridge at the input to make reverse polarity ...
0
votes
1answer
33 views

How to decided which bridge rectifier to use?

I am making a torch without batteries ie. It has a neodymium magnet in a 1" PVC pipe with 1000 turns of enameled magnet wire and generates 4.4V AC easily, then I'll put the rectifier and then connect ...
0
votes
2answers
215 views

Choosing Diodes for 3-Phase Rectifier

I'm building a rectifier to rectify a 3-phase signal for part of a school project, so I'm not working at these power levels without help and supervision. This seems to be an appropriate circuit as ...
0
votes
1answer
137 views

D.C power supplies, regulated linear power supply question

Design giving the necessary ratings and characteristics the necessary for the transformer, bridge rectifier capacitor and regulator , a 12v , 2A regulated power supply . the available mains supply is ...
0
votes
3answers
87 views

Using half wave rectifier for low power applications

Im trying to make a low power application feeding it from a 9vAC, source, i have been reading that i can use a half wave instead of a full wave rectifier, i already did the circuit and been doing ...
0
votes
0answers
36 views

current feedback design

How do I select the current sensing resistor \$R_{56}\$ with following details: Feedback threshold voltage is 0.5V. DC input voltage 400V. AC output voltage 230V. output power is 500W. operating ...
1
vote
1answer
105 views

Why two resistors at Gate side of IGBT

Why two resistors(R5 and R9) are required at the gate side of IGBT Q3? According to me they are used as potential divider, but can any one tell why it is needed over there? In datasheet it is clear ...
0
votes
1answer
63 views

Ideal full wave rectifier for 100V @2A

I have a 50Vrms sinewave (100Hz and 2A), I rectify it using a full wave rectifier. Are their away to implement an( ideal full wave rectifier) with this specifications using LM358P (its input is 0 and ...
0
votes
1answer
65 views

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 ...
0
votes
0answers
67 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 ...
0
votes
3answers
81 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 ...
2
votes
2answers
292 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 ...
0
votes
0answers
38 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?
-1
votes
1answer
102 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 ...
3
votes
1answer
133 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 ...
0
votes
1answer
36 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 ...
0
votes
0answers
49 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 ...
4
votes
2answers
445 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 ...
-1
votes
2answers
69 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 ...
1
vote
2answers
149 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 ...
1
vote
1answer
92 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 ...
3
votes
2answers
423 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 ...
0
votes
1answer
108 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 ...
2
votes
1answer
105 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?
-1
votes
1answer
147 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 ...
1
vote
2answers
474 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 ...
0
votes
1answer
45 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 ...
0
votes
2answers
184 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 ...
1
vote
2answers
198 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 ...