All About Circuits Forum Half-Wave Rectifier Average Diode Current
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#1
07-02-2009, 03:21 AM
 Petrucciowns Member Join Date: Jun 2009 Posts: 62
Half-Wave Rectifier Average Diode Current

http://img12.imageshack.us/img12/7084/helpphg.jpg

In the image shown above how is the average diode current calculated? This is an old homework assignment and I'm taking notes. I would appreciate any help.

Thank you.
#2
07-02-2009, 07:55 AM
 vvkannan Senior Member Join Date: Aug 2008 Location: India Posts: 137

Hi Petrucciowns,

The average load voltage divided by the load resistance will give you the average load current which is the average diode current.
#3
07-02-2009, 06:12 PM
 Petrucciowns Member Join Date: Jun 2009 Posts: 62

Hm, I know that is how to find the peak diode current, but the average diode current is different. How is the average diode current found? I tried to see if it was the same value in RMS but that is not correct. So I'm stumped.
#4
07-02-2009, 10:17 PM
 Jony130 Senior Member Join Date: Feb 2009 Location: Poland/Wroclaw Posts: 2,496

To find a average voltage, you have to finding the area under the output curve over a full cycle (2∏)
So you need to calculate the definite integral from 0 to ∏, to find area under the curve.
And then:
Vavg=area/2∏=1/2∏*∫Vpsinθ dθ =Vp/∏
#5
07-02-2009, 10:49 PM
 Petrucciowns Member Join Date: Jun 2009 Posts: 62

Awesome that was exactly what I was looking for.

Thanks

 Tags average, current, diode, halfwave, rectifier

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