# rectifier

Discussion in 'Electronics Homework Help' started by imlookingforsomehelp, Oct 18, 2010.

1. ### imlookingforsomehelp

9
0
Oct 18, 2010
Hello.

Before I start writing about my problem, I would like to say, that i'm not english and i don't know the typical

electronics names in english language, so sorry for all mistakes that I will make . I will be also pasting some

pictures to let you know what I'm talking about. If I'm writing this in wrong section please move it to

another one.

So, well , I'm looking for some help with a report (kind of homework). It's about rectifier , which looks like

that Wej means -input , wyj - output.

I was doing measurements at school using oscilloscope , function generator and frequency meter. The

Below are the parameters that I've received:

1.Harmonic Voltage UTR =13V
2.Voltage rectified by the rectifier U1 = 13V . 200Hz (translating on english from my language it would be

like voltage rectified by the rectifier one-half. It gets results that looks like

)
3.Voltage rectified by the rectifier 'two-half" U2=12,5 V , 400Hz ( it gets results like

this )
4. Volage U1S – stabilized U1 byRC circuit 8,8V (constant) , 0.075V(variable)
5. Voltage U2S - stabilised U2 by RC circuit 10V(constant) , 0,04V (variable)

Unfortunately i didn't get frequency fot the last two , so i can only guess what it should be.

I had to check the voltages shapes when the generator gives triangular and rectangular voltage.

In the report I have to :

1. make a graph when the generator gives sinusoidal ,riangular and rectangular voltage ( the last two I didnt

check )

2 Calculate the average and effective voltages value Utr , U1 , U2 for rectifier one-half and two-half.

Mistakes Estimate by the total differential method.

3. Compare the caltulated average voltages values of U1 , U2 with the measured constant components U1S ,

U2S. Explain whe the variable components appeared.

4.Calculate the efficiency of the voltage and the ripple factor for both of the rectifier (one-half and

one-two). Mistakes estimate by the total differential method.

That's all. I hope this is readable and someone will help me! It's very important for me. And sorry for the

I will appreciate if someone can help me , especially on msn.

2. ### (*steve*)¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥdModerator

25,448
2,809
Jan 21, 2010
2) The correct term in English is "half-wave rectification". You can imagine that those gaps are where the lower half of the sine (harmonic?) wave that is your source.

3) The correct term in English is "full-wave rectification". You can imagine that the lower half of each sine wave is (sort of) folded up to fit in the gaps that you saw in (2).

3. ### imlookingforsomehelp

9
0
Oct 18, 2010
Ok, I dont know much about electronics so i need alot of help . I have to asnwer those questions but i dont even know how to start